/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 15:37:22,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 15:37:22,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 15:37:22,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 15:37:22,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 15:37:22,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 15:37:22,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 15:37:22,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 15:37:22,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 15:37:22,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 15:37:22,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 15:37:22,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 15:37:22,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 15:37:22,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 15:37:22,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 15:37:22,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 15:37:22,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 15:37:22,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 15:37:22,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 15:37:22,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 15:37:22,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 15:37:22,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 15:37:22,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 15:37:22,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 15:37:22,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-18 15:37:22,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-18 15:37:22,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-18 15:37:22,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-18 15:37:22,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-18 15:37:22,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-18 15:37:22,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 15:37:22,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 15:37:22,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 15:37:22,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 15:37:22,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 15:37:22,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 15:37:22,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 15:37:22,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 15:37:22,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 15:37:22,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 15:37:22,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 15:37:22,587 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 [2019-12-18 15:37:22,614 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 15:37:22,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 15:37:22,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 15:37:22,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 15:37:22,616 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 15:37:22,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 15:37:22,616 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 15:37:22,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 15:37:22,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 15:37:22,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 15:37:22,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 15:37:22,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 15:37:22,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 15:37:22,617 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 15:37:22,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 15:37:22,618 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 15:37:22,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 15:37:22,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 15:37:22,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 15:37:22,619 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 15:37:22,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 15:37:22,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 15:37:22,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 15:37:22,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 15:37:22,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 15:37:22,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 15:37:22,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 15:37:22,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 15:37:22,621 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 15:37:22,906 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 15:37:22,920 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 15:37:22,923 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 15:37:22,925 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 15:37:22,925 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 15:37:22,926 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2019-12-18 15:37:23,016 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9057ad316/8754ffdde557497f905ae9d4e201754d/FLAG45f06e563 [2019-12-18 15:37:23,612 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 15:37:23,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2019-12-18 15:37:23,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9057ad316/8754ffdde557497f905ae9d4e201754d/FLAG45f06e563 [2019-12-18 15:37:23,902 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9057ad316/8754ffdde557497f905ae9d4e201754d [2019-12-18 15:37:23,911 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 15:37:23,913 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 15:37:23,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 15:37:23,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 15:37:23,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 15:37:23,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 03:37:23" (1/1) ... [2019-12-18 15:37:23,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@497b151a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:23, skipping insertion in model container [2019-12-18 15:37:23,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 03:37:23" (1/1) ... [2019-12-18 15:37:23,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 15:37:23,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 15:37:24,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 15:37:24,454 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 15:37:24,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 15:37:24,581 INFO L208 MainTranslator]: Completed translation [2019-12-18 15:37:24,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24 WrapperNode [2019-12-18 15:37:24,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 15:37:24,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 15:37:24,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 15:37:24,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 15:37:24,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 15:37:24,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 15:37:24,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 15:37:24,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 15:37:24,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... [2019-12-18 15:37:24,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 15:37:24,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 15:37:24,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 15:37:24,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 15:37:24,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 15:37:24,725 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 15:37:24,725 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 15:37:24,725 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 15:37:24,726 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 15:37:24,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 15:37:24,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 15:37:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 15:37:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 15:37:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 15:37:24,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 15:37:24,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 15:37:24,729 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-18 15:37:25,085 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 15:37:25,085 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 15:37:25,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 03:37:25 BoogieIcfgContainer [2019-12-18 15:37:25,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 15:37:25,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 15:37:25,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 15:37:25,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 15:37:25,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 03:37:23" (1/3) ... [2019-12-18 15:37:25,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d5e937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 03:37:25, skipping insertion in model container [2019-12-18 15:37:25,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 03:37:24" (2/3) ... [2019-12-18 15:37:25,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d5e937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 03:37:25, skipping insertion in model container [2019-12-18 15:37:25,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 03:37:25" (3/3) ... [2019-12-18 15:37:25,101 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2019-12-18 15:37:25,112 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 15:37:25,113 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 15:37:25,124 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 15:37:25,125 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 15:37:25,157 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,157 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,158 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,158 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,158 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,159 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,159 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,159 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,159 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,160 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,160 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,160 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,160 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,161 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,161 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,162 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,162 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,162 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,162 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,163 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,163 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,163 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,163 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,164 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,164 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,165 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,165 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,165 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,165 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,166 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,170 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,170 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,170 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,171 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,171 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,171 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,177 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,177 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,178 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,178 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,178 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,178 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 15:37:25,194 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 15:37:25,216 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 15:37:25,216 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 15:37:25,216 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 15:37:25,217 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 15:37:25,217 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 15:37:25,217 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 15:37:25,217 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 15:37:25,217 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 15:37:25,231 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-18 15:37:25,233 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 15:37:25,275 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 15:37:25,275 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 15:37:25,282 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 6/51 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-18 15:37:25,286 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-18 15:37:25,303 INFO L126 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-18 15:37:25,303 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 15:37:25,305 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 6/51 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-18 15:37:25,308 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-18 15:37:25,309 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-18 15:37:26,545 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-18 15:37:26,670 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-18 15:37:26,670 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-18 15:37:26,674 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-18 15:37:26,682 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-18 15:37:26,684 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-18 15:37:26,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-18 15:37:26,691 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:26,692 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-18 15:37:26,692 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:26,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:26,698 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-18 15:37:26,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:26,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428754400] [2019-12-18 15:37:26,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:26,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428754400] [2019-12-18 15:37:26,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 15:37:26,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-18 15:37:26,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345467128] [2019-12-18 15:37:26,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 15:37:26,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:26,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 15:37:26,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 15:37:26,982 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-18 15:37:27,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:27,023 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-18 15:37:27,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 15:37:27,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-18 15:37:27,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:27,056 INFO L225 Difference]: With dead ends: 54 [2019-12-18 15:37:27,056 INFO L226 Difference]: Without dead ends: 36 [2019-12-18 15:37:27,057 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 15:37:27,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-18 15:37:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-18 15:37:27,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-18 15:37:27,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-18 15:37:27,090 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-18 15:37:27,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:27,091 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-18 15:37:27,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 15:37:27,091 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-18 15:37:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 15:37:27,092 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:27,092 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:27,092 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:27,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:27,093 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-18 15:37:27,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:27,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298307470] [2019-12-18 15:37:27,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:27,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298307470] [2019-12-18 15:37:27,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 15:37:27,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 15:37:27,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605987860] [2019-12-18 15:37:27,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 15:37:27,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:27,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 15:37:27,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 15:37:27,190 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-18 15:37:27,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:27,211 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-18 15:37:27,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 15:37:27,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 15:37:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:27,213 INFO L225 Difference]: With dead ends: 42 [2019-12-18 15:37:27,213 INFO L226 Difference]: Without dead ends: 41 [2019-12-18 15:37:27,214 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 15:37:27,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-18 15:37:27,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-18 15:37:27,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-18 15:37:27,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-18 15:37:27,222 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-18 15:37:27,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:27,222 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-18 15:37:27,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 15:37:27,223 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-18 15:37:27,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 15:37:27,223 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:27,224 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:27,224 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:27,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:27,224 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-18 15:37:27,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:27,225 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938254878] [2019-12-18 15:37:27,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:27,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938254878] [2019-12-18 15:37:27,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 15:37:27,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 15:37:27,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258192398] [2019-12-18 15:37:27,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 15:37:27,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:27,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 15:37:27,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 15:37:27,319 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-18 15:37:27,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:27,332 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-18 15:37:27,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 15:37:27,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 15:37:27,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:27,334 INFO L225 Difference]: With dead ends: 51 [2019-12-18 15:37:27,334 INFO L226 Difference]: Without dead ends: 50 [2019-12-18 15:37:27,335 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 15:37:27,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-18 15:37:27,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-18 15:37:27,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-18 15:37:27,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-18 15:37:27,343 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-18 15:37:27,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:27,343 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-18 15:37:27,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 15:37:27,343 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-18 15:37:27,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 15:37:27,344 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:27,344 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:27,345 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:27,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-18 15:37:27,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:27,345 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117720227] [2019-12-18 15:37:27,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:27,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117720227] [2019-12-18 15:37:27,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427340249] [2019-12-18 15:37:27,469 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:27,547 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:27,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:27,550 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 15:37:27,559 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:27,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:27,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 15:37:27,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429148455] [2019-12-18 15:37:27,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 15:37:27,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:27,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 15:37:27,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-18 15:37:27,617 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-18 15:37:27,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:27,654 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-18 15:37:27,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 15:37:27,655 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 15:37:27,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:27,657 INFO L225 Difference]: With dead ends: 56 [2019-12-18 15:37:27,659 INFO L226 Difference]: Without dead ends: 55 [2019-12-18 15:37:27,660 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-18 15:37:27,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-18 15:37:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-18 15:37:27,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-18 15:37:27,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-18 15:37:27,674 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-18 15:37:27,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:27,675 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-18 15:37:27,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 15:37:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-18 15:37:27,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 15:37:27,676 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:27,676 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:27,881 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:27,884 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:27,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:27,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-18 15:37:27,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:27,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425530072] [2019-12-18 15:37:27,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:27,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425530072] [2019-12-18 15:37:27,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626214906] [2019-12-18 15:37:27,985 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:28,042 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:28,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:28,044 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 15:37:28,045 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:28,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:28,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-18 15:37:28,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303903350] [2019-12-18 15:37:28,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 15:37:28,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:28,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 15:37:28,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-18 15:37:28,093 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 8 states. [2019-12-18 15:37:28,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:28,163 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-18 15:37:28,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 15:37:28,165 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-18 15:37:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:28,166 INFO L225 Difference]: With dead ends: 63 [2019-12-18 15:37:28,166 INFO L226 Difference]: Without dead ends: 62 [2019-12-18 15:37:28,170 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-18 15:37:28,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-18 15:37:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-18 15:37:28,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-18 15:37:28,185 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-18 15:37:28,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:28,186 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-18 15:37:28,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 15:37:28,186 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-18 15:37:28,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 15:37:28,187 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:28,187 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:28,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:28,388 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:28,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:28,389 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-18 15:37:28,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:28,389 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162528053] [2019-12-18 15:37:28,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:28,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162528053] [2019-12-18 15:37:28,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843476973] [2019-12-18 15:37:28,501 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:28,559 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:37:28,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:28,560 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:37:28,561 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:28,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:28,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 15:37:28,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792437560] [2019-12-18 15:37:28,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:37:28,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:28,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:37:28,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:28,630 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-18 15:37:28,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:28,660 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-18 15:37:28,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 15:37:28,660 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 15:37:28,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:28,661 INFO L225 Difference]: With dead ends: 66 [2019-12-18 15:37:28,661 INFO L226 Difference]: Without dead ends: 65 [2019-12-18 15:37:28,662 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:28,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-18 15:37:28,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-18 15:37:28,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-18 15:37:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-18 15:37:28,671 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-18 15:37:28,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:28,671 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-18 15:37:28,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:37:28,671 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-18 15:37:28,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 15:37:28,672 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:28,672 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:28,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:28,877 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:28,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:28,877 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-18 15:37:28,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:28,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170501306] [2019-12-18 15:37:28,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:28,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170501306] [2019-12-18 15:37:28,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 15:37:28,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 15:37:28,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809449576] [2019-12-18 15:37:28,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 15:37:28,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:28,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 15:37:28,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-18 15:37:28,968 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-18 15:37:28,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:28,990 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-18 15:37:28,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 15:37:28,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 15:37:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:28,994 INFO L225 Difference]: With dead ends: 68 [2019-12-18 15:37:28,994 INFO L226 Difference]: Without dead ends: 67 [2019-12-18 15:37:28,995 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-18 15:37:28,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-18 15:37:29,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-18 15:37:29,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-18 15:37:29,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-18 15:37:29,005 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-18 15:37:29,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:29,010 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-18 15:37:29,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 15:37:29,010 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-18 15:37:29,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 15:37:29,011 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:29,011 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:29,011 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:29,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:29,012 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-18 15:37:29,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:29,015 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196362860] [2019-12-18 15:37:29,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:29,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196362860] [2019-12-18 15:37:29,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 15:37:29,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 15:37:29,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419033192] [2019-12-18 15:37:29,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 15:37:29,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:29,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 15:37:29,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-18 15:37:29,089 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-18 15:37:29,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:29,122 INFO L93 Difference]: Finished difference Result 69 states and 145 transitions. [2019-12-18 15:37:29,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 15:37:29,123 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 15:37:29,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:29,124 INFO L225 Difference]: With dead ends: 69 [2019-12-18 15:37:29,124 INFO L226 Difference]: Without dead ends: 68 [2019-12-18 15:37:29,124 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-12-18 15:37:29,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-18 15:37:29,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2019-12-18 15:37:29,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-18 15:37:29,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-18 15:37:29,133 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-18 15:37:29,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:29,136 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-18 15:37:29,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 15:37:29,136 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-18 15:37:29,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 15:37:29,137 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:29,137 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:29,137 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:29,138 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-18 15:37:29,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:29,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372907162] [2019-12-18 15:37:29,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:29,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372907162] [2019-12-18 15:37:29,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140274643] [2019-12-18 15:37:29,213 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:29,252 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:37:29,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:29,254 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:37:29,254 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:29,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:29,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 15:37:29,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721442357] [2019-12-18 15:37:29,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:37:29,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:29,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:37:29,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:29,307 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 10 states. [2019-12-18 15:37:29,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:29,395 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-18 15:37:29,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 15:37:29,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-18 15:37:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:29,396 INFO L225 Difference]: With dead ends: 77 [2019-12-18 15:37:29,396 INFO L226 Difference]: Without dead ends: 76 [2019-12-18 15:37:29,397 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-12-18 15:37:29,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-18 15:37:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-18 15:37:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-18 15:37:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-18 15:37:29,402 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-18 15:37:29,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:29,403 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-18 15:37:29,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:37:29,403 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-18 15:37:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:37:29,404 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:29,404 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:29,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:29,605 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:29,605 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-18 15:37:29,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:29,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658986219] [2019-12-18 15:37:29,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:29,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658986219] [2019-12-18 15:37:29,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827299093] [2019-12-18 15:37:29,687 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:29,736 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:29,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:29,737 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:29,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:29,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:29,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:29,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542812438] [2019-12-18 15:37:29,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:29,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:29,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:29,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:29,816 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-18 15:37:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:29,853 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-18 15:37:29,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 15:37:29,854 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 15:37:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:29,855 INFO L225 Difference]: With dead ends: 80 [2019-12-18 15:37:29,855 INFO L226 Difference]: Without dead ends: 79 [2019-12-18 15:37:29,855 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-18 15:37:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-18 15:37:29,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-18 15:37:29,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-18 15:37:29,865 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-18 15:37:29,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:29,865 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-18 15:37:29,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:29,865 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-18 15:37:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:37:29,866 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:29,866 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:30,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:30,068 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:30,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:30,068 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-18 15:37:30,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:30,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934740806] [2019-12-18 15:37:30,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:30,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934740806] [2019-12-18 15:37:30,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518744948] [2019-12-18 15:37:30,144 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:30,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:37:30,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:30,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:37:30,197 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:30,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:30,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 15:37:30,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680965777] [2019-12-18 15:37:30,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:37:30,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:30,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:37:30,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:30,300 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-18 15:37:30,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:30,400 INFO L93 Difference]: Finished difference Result 81 states and 174 transitions. [2019-12-18 15:37:30,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 15:37:30,400 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 15:37:30,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:30,401 INFO L225 Difference]: With dead ends: 81 [2019-12-18 15:37:30,402 INFO L226 Difference]: Without dead ends: 80 [2019-12-18 15:37:30,402 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-12-18 15:37:30,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-18 15:37:30,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2019-12-18 15:37:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-18 15:37:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-18 15:37:30,416 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-18 15:37:30,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:30,417 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-18 15:37:30,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:37:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-18 15:37:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:37:30,421 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:30,421 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:30,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:30,623 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:30,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:30,623 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-18 15:37:30,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:30,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4816611] [2019-12-18 15:37:30,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:30,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4816611] [2019-12-18 15:37:30,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995729374] [2019-12-18 15:37:30,701 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:30,763 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:30,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:30,764 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:37:30,768 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:30,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:30,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 15:37:30,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649285225] [2019-12-18 15:37:30,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:37:30,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:30,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:37:30,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:30,841 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-18 15:37:30,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:30,908 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-18 15:37:30,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 15:37:30,908 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 15:37:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:30,909 INFO L225 Difference]: With dead ends: 85 [2019-12-18 15:37:30,909 INFO L226 Difference]: Without dead ends: 84 [2019-12-18 15:37:30,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-12-18 15:37:30,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-18 15:37:30,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2019-12-18 15:37:30,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-18 15:37:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-18 15:37:30,914 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-18 15:37:30,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:30,915 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-18 15:37:30,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:37:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-18 15:37:30,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:37:30,916 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:30,916 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:31,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:31,125 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:31,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:31,126 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-18 15:37:31,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:31,127 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477425450] [2019-12-18 15:37:31,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:31,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477425450] [2019-12-18 15:37:31,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000653200] [2019-12-18 15:37:31,183 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:31,232 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:31,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:31,233 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:37:31,234 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:31,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:31,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 15:37:31,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208208830] [2019-12-18 15:37:31,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:37:31,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:31,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:37:31,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:31,283 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-18 15:37:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:31,393 INFO L93 Difference]: Finished difference Result 86 states and 182 transitions. [2019-12-18 15:37:31,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:31,393 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 15:37:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:31,395 INFO L225 Difference]: With dead ends: 86 [2019-12-18 15:37:31,395 INFO L226 Difference]: Without dead ends: 85 [2019-12-18 15:37:31,395 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:31,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-18 15:37:31,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2019-12-18 15:37:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-18 15:37:31,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-18 15:37:31,403 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-18 15:37:31,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:31,403 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-18 15:37:31,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:37:31,404 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-18 15:37:31,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:37:31,405 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:31,405 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:31,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:31,617 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:31,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:31,617 INFO L82 PathProgramCache]: Analyzing trace with hash 507891352, now seen corresponding path program 6 times [2019-12-18 15:37:31,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:31,618 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818655039] [2019-12-18 15:37:31,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:31,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818655039] [2019-12-18 15:37:31,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444763500] [2019-12-18 15:37:31,669 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:31,723 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 15:37:31,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:31,724 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:31,725 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:31,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:31,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 15:37:31,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295747691] [2019-12-18 15:37:31,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:37:31,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:31,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:37:31,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:31,770 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-18 15:37:31,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:31,866 INFO L93 Difference]: Finished difference Result 89 states and 185 transitions. [2019-12-18 15:37:31,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:37:31,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 15:37:31,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:31,868 INFO L225 Difference]: With dead ends: 89 [2019-12-18 15:37:31,868 INFO L226 Difference]: Without dead ends: 88 [2019-12-18 15:37:31,868 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-12-18 15:37:31,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-12-18 15:37:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2019-12-18 15:37:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-18 15:37:31,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-18 15:37:31,872 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-18 15:37:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:31,873 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-18 15:37:31,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:37:31,873 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-18 15:37:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:37:31,873 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:31,873 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:32,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:32,074 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:32,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:32,074 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 7 times [2019-12-18 15:37:32,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:32,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827997165] [2019-12-18 15:37:32,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:32,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827997165] [2019-12-18 15:37:32,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491393476] [2019-12-18 15:37:32,132 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:32,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:37:32,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:32,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:32,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 15:37:32,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044689003] [2019-12-18 15:37:32,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:37:32,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:32,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:37:32,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:32,251 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-18 15:37:32,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:32,352 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-18 15:37:32,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:37:32,353 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 15:37:32,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:32,354 INFO L225 Difference]: With dead ends: 88 [2019-12-18 15:37:32,354 INFO L226 Difference]: Without dead ends: 87 [2019-12-18 15:37:32,354 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2019-12-18 15:37:32,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-18 15:37:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2019-12-18 15:37:32,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-18 15:37:32,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-18 15:37:32,358 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-18 15:37:32,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:32,359 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-18 15:37:32,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:37:32,359 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-18 15:37:32,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:37:32,359 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:32,359 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:32,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:32,564 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:32,564 INFO L82 PathProgramCache]: Analyzing trace with hash 507886547, now seen corresponding path program 8 times [2019-12-18 15:37:32,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:32,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381943950] [2019-12-18 15:37:32,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:32,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381943950] [2019-12-18 15:37:32,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520549436] [2019-12-18 15:37:32,617 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:32,663 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:32,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:32,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 15:37:32,666 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:32,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:32,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-18 15:37:32,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160661884] [2019-12-18 15:37:32,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 15:37:32,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:32,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 15:37:32,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-18 15:37:32,718 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-18 15:37:32,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:32,808 INFO L93 Difference]: Finished difference Result 87 states and 180 transitions. [2019-12-18 15:37:32,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:37:32,809 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-18 15:37:32,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:32,810 INFO L225 Difference]: With dead ends: 87 [2019-12-18 15:37:32,810 INFO L226 Difference]: Without dead ends: 86 [2019-12-18 15:37:32,811 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2019-12-18 15:37:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-18 15:37:32,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2019-12-18 15:37:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-18 15:37:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-18 15:37:32,815 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-18 15:37:32,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:32,815 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-18 15:37:32,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 15:37:32,815 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-18 15:37:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 15:37:32,816 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:32,816 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:33,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:33,020 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:33,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:33,021 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-18 15:37:33,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:33,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041721689] [2019-12-18 15:37:33,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:33,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041721689] [2019-12-18 15:37:33,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195488849] [2019-12-18 15:37:33,111 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:33,152 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:33,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:33,153 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:33,154 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:33,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:33,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:33,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263398253] [2019-12-18 15:37:33,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:33,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:33,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:33,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:33,213 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 12 states. [2019-12-18 15:37:33,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:33,310 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-18 15:37:33,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 15:37:33,310 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-18 15:37:33,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:33,311 INFO L225 Difference]: With dead ends: 92 [2019-12-18 15:37:33,312 INFO L226 Difference]: Without dead ends: 91 [2019-12-18 15:37:33,312 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:37:33,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-18 15:37:33,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-18 15:37:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-18 15:37:33,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-18 15:37:33,316 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-18 15:37:33,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:33,316 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-18 15:37:33,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:33,316 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-18 15:37:33,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:33,317 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:33,317 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:33,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:33,518 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:33,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:33,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-18 15:37:33,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:33,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352712173] [2019-12-18 15:37:33,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:33,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352712173] [2019-12-18 15:37:33,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945553896] [2019-12-18 15:37:33,589 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:33,641 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:37:33,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:33,642 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:33,643 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:33,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:33,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:33,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080714601] [2019-12-18 15:37:33,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:33,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:33,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:33,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:33,745 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-18 15:37:33,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:33,792 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-18 15:37:33,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:33,793 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 15:37:33,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:33,794 INFO L225 Difference]: With dead ends: 95 [2019-12-18 15:37:33,795 INFO L226 Difference]: Without dead ends: 94 [2019-12-18 15:37:33,795 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:33,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-18 15:37:33,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-18 15:37:33,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 15:37:33,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 15:37:33,799 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 15:37:33,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:33,800 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 15:37:33,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:33,800 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 15:37:33,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:33,801 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:33,801 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:34,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:34,007 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:34,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:34,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 9 times [2019-12-18 15:37:34,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:34,008 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412524483] [2019-12-18 15:37:34,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:34,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412524483] [2019-12-18 15:37:34,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908812831] [2019-12-18 15:37:34,070 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:34,117 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:37:34,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:34,118 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:34,119 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:34,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:34,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:34,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556004587] [2019-12-18 15:37:34,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:34,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:34,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:34,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:34,206 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 15:37:34,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:34,308 INFO L93 Difference]: Finished difference Result 98 states and 211 transitions. [2019-12-18 15:37:34,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 15:37:34,309 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:34,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:34,310 INFO L225 Difference]: With dead ends: 98 [2019-12-18 15:37:34,310 INFO L226 Difference]: Without dead ends: 97 [2019-12-18 15:37:34,310 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:37:34,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-18 15:37:34,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2019-12-18 15:37:34,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 15:37:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 15:37:34,314 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 15:37:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:34,314 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 15:37:34,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:34,314 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 15:37:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:34,315 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:34,315 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:34,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:34,522 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:34,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:34,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 10 times [2019-12-18 15:37:34,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:34,523 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74824276] [2019-12-18 15:37:34,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:34,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74824276] [2019-12-18 15:37:34,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118216300] [2019-12-18 15:37:34,586 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:34,633 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:34,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:34,634 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:34,636 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:34,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:34,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:34,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964551988] [2019-12-18 15:37:34,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:34,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:34,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:34,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:34,712 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 15:37:34,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:34,806 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-18 15:37:34,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 15:37:34,806 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:34,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:34,807 INFO L225 Difference]: With dead ends: 101 [2019-12-18 15:37:34,807 INFO L226 Difference]: Without dead ends: 100 [2019-12-18 15:37:34,808 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:37:34,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-18 15:37:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-18 15:37:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 15:37:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 15:37:34,812 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 15:37:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:34,812 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 15:37:34,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:34,813 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 15:37:34,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:34,813 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:34,813 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:35,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:35,016 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 11 times [2019-12-18 15:37:35,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:35,017 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573244447] [2019-12-18 15:37:35,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:35,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573244447] [2019-12-18 15:37:35,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112232587] [2019-12-18 15:37:35,072 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:35,123 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:35,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:35,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:35,125 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:35,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:35,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:35,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077430627] [2019-12-18 15:37:35,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:35,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:35,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:35,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:35,235 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 15:37:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:35,403 INFO L93 Difference]: Finished difference Result 105 states and 221 transitions. [2019-12-18 15:37:35,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:37:35,403 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:35,404 INFO L225 Difference]: With dead ends: 105 [2019-12-18 15:37:35,405 INFO L226 Difference]: Without dead ends: 104 [2019-12-18 15:37:35,405 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2019-12-18 15:37:35,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-18 15:37:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2019-12-18 15:37:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-18 15:37:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-18 15:37:35,410 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-18 15:37:35,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:35,411 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-18 15:37:35,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:35,411 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-18 15:37:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:35,412 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:35,412 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:35,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:35,615 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:35,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:35,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555059, now seen corresponding path program 12 times [2019-12-18 15:37:35,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:35,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702754370] [2019-12-18 15:37:35,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:35,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702754370] [2019-12-18 15:37:35,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925035248] [2019-12-18 15:37:35,680 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:35,729 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 15:37:35,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:35,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:35,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:35,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:35,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:35,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833283087] [2019-12-18 15:37:35,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:35,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:35,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:35,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:35,814 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-18 15:37:35,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:35,915 INFO L93 Difference]: Finished difference Result 103 states and 216 transitions. [2019-12-18 15:37:35,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 15:37:35,916 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:35,917 INFO L225 Difference]: With dead ends: 103 [2019-12-18 15:37:35,917 INFO L226 Difference]: Without dead ends: 102 [2019-12-18 15:37:35,918 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:37:35,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-18 15:37:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2019-12-18 15:37:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-18 15:37:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-18 15:37:35,922 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-18 15:37:35,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:35,923 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-18 15:37:35,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:35,923 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-18 15:37:35,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:35,923 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:35,923 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:36,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:36,127 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:36,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 13 times [2019-12-18 15:37:36,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:36,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6682535] [2019-12-18 15:37:36,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:36,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6682535] [2019-12-18 15:37:36,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067662430] [2019-12-18 15:37:36,191 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:36,245 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:36,245 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:36,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:36,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:36,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580987873] [2019-12-18 15:37:36,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:36,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:36,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:36,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:36,323 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-18 15:37:36,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:36,466 INFO L93 Difference]: Finished difference Result 110 states and 232 transitions. [2019-12-18 15:37:36,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:37:36,466 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:36,467 INFO L225 Difference]: With dead ends: 110 [2019-12-18 15:37:36,467 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 15:37:36,468 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2019-12-18 15:37:36,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 15:37:36,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2019-12-18 15:37:36,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 15:37:36,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 15:37:36,473 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 15:37:36,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:36,473 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 15:37:36,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:36,474 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 15:37:36,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:36,474 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:36,474 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:36,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:36,678 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:36,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:36,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 14 times [2019-12-18 15:37:36,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:36,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628316973] [2019-12-18 15:37:36,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:36,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628316973] [2019-12-18 15:37:36,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229583156] [2019-12-18 15:37:36,743 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:36,801 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:36,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:36,802 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:36,804 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:36,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:36,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:36,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965863857] [2019-12-18 15:37:36,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:36,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:36,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:36,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:36,864 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 15:37:37,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:37,012 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-18 15:37:37,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 15:37:37,020 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:37,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:37,021 INFO L225 Difference]: With dead ends: 112 [2019-12-18 15:37:37,021 INFO L226 Difference]: Without dead ends: 111 [2019-12-18 15:37:37,021 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:37:37,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-18 15:37:37,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2019-12-18 15:37:37,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 15:37:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 15:37:37,025 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 15:37:37,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:37,025 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 15:37:37,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 15:37:37,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:37,026 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:37,026 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:37,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:37,230 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:37,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:37,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 15 times [2019-12-18 15:37:37,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:37,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636779794] [2019-12-18 15:37:37,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:37,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636779794] [2019-12-18 15:37:37,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571958236] [2019-12-18 15:37:37,291 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:37,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:37:37,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:37,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:37,340 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:37,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:37,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:37,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014628568] [2019-12-18 15:37:37,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:37,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:37,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:37,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:37,402 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 15:37:37,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:37,537 INFO L93 Difference]: Finished difference Result 106 states and 225 transitions. [2019-12-18 15:37:37,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:37:37,538 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:37,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:37,539 INFO L225 Difference]: With dead ends: 106 [2019-12-18 15:37:37,539 INFO L226 Difference]: Without dead ends: 105 [2019-12-18 15:37:37,539 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:37:37,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-18 15:37:37,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2019-12-18 15:37:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 15:37:37,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 15:37:37,543 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 15:37:37,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:37,543 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 15:37:37,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 15:37:37,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:37,544 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:37,544 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:37,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:37,747 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:37,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1435231979, now seen corresponding path program 16 times [2019-12-18 15:37:37,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:37,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871091505] [2019-12-18 15:37:37,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:37,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871091505] [2019-12-18 15:37:37,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847410049] [2019-12-18 15:37:37,822 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:37,866 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:37,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:37,867 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:37,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:37,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:37,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:37,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418447521] [2019-12-18 15:37:37,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:37,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:37,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:37,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:37,945 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 15:37:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:38,213 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-18 15:37:38,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:37:38,213 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:38,214 INFO L225 Difference]: With dead ends: 112 [2019-12-18 15:37:38,214 INFO L226 Difference]: Without dead ends: 111 [2019-12-18 15:37:38,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2019-12-18 15:37:38,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-18 15:37:38,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2019-12-18 15:37:38,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-18 15:37:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-18 15:37:38,218 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-18 15:37:38,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:38,218 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-18 15:37:38,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:38,218 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-18 15:37:38,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:38,219 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:38,219 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:38,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:38,423 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:38,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:38,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236629, now seen corresponding path program 17 times [2019-12-18 15:37:38,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:38,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356725748] [2019-12-18 15:37:38,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:38,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356725748] [2019-12-18 15:37:38,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158481210] [2019-12-18 15:37:38,487 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:38,534 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:38,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:38,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:38,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:38,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:38,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:38,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617842582] [2019-12-18 15:37:38,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:38,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:38,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:38,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:38,627 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-18 15:37:38,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:38,840 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-18 15:37:38,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:37:38,840 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:38,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:38,841 INFO L225 Difference]: With dead ends: 115 [2019-12-18 15:37:38,841 INFO L226 Difference]: Without dead ends: 114 [2019-12-18 15:37:38,841 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:37:38,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-18 15:37:38,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2019-12-18 15:37:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-18 15:37:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-18 15:37:38,845 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-18 15:37:38,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:38,845 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-18 15:37:38,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-18 15:37:38,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:38,846 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:38,846 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:39,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:39,050 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:39,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:39,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236784, now seen corresponding path program 18 times [2019-12-18 15:37:39,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:39,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141734325] [2019-12-18 15:37:39,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:39,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141734325] [2019-12-18 15:37:39,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213037879] [2019-12-18 15:37:39,122 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:39,162 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 15:37:39,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:39,163 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:39,163 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:39,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:39,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:39,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660266931] [2019-12-18 15:37:39,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:39,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:39,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:39,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:39,254 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-18 15:37:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:39,499 INFO L93 Difference]: Finished difference Result 111 states and 231 transitions. [2019-12-18 15:37:39,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:37:39,500 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:39,501 INFO L225 Difference]: With dead ends: 111 [2019-12-18 15:37:39,501 INFO L226 Difference]: Without dead ends: 109 [2019-12-18 15:37:39,502 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:37:39,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-18 15:37:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2019-12-18 15:37:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-18 15:37:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-18 15:37:39,506 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-18 15:37:39,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:39,506 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-18 15:37:39,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:39,507 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-18 15:37:39,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:39,507 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:39,507 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:39,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:39,711 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:39,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:39,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380779, now seen corresponding path program 19 times [2019-12-18 15:37:39,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:39,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981166188] [2019-12-18 15:37:39,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:39,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981166188] [2019-12-18 15:37:39,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873481006] [2019-12-18 15:37:39,782 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:39,829 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:39,830 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:39,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:39,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:39,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727043287] [2019-12-18 15:37:39,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:39,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:39,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:39,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:39,899 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 12 states. [2019-12-18 15:37:40,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:40,090 INFO L93 Difference]: Finished difference Result 109 states and 228 transitions. [2019-12-18 15:37:40,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 15:37:40,091 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:40,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:40,092 INFO L225 Difference]: With dead ends: 109 [2019-12-18 15:37:40,092 INFO L226 Difference]: Without dead ends: 108 [2019-12-18 15:37:40,092 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2019-12-18 15:37:40,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-18 15:37:40,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2019-12-18 15:37:40,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-18 15:37:40,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 194 transitions. [2019-12-18 15:37:40,097 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 194 transitions. Word has length 11 [2019-12-18 15:37:40,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:40,098 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 194 transitions. [2019-12-18 15:37:40,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:40,098 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 194 transitions. [2019-12-18 15:37:40,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:40,098 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:40,098 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:40,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:40,302 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:40,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 20 times [2019-12-18 15:37:40,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:40,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614727122] [2019-12-18 15:37:40,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:40,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614727122] [2019-12-18 15:37:40,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173112608] [2019-12-18 15:37:40,389 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:40,454 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:40,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:40,455 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 15:37:40,456 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:40,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:40,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:40,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600078795] [2019-12-18 15:37:40,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:40,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:40,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:40,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:40,555 INFO L87 Difference]: Start difference. First operand 88 states and 194 transitions. Second operand 12 states. [2019-12-18 15:37:40,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:40,840 INFO L93 Difference]: Finished difference Result 116 states and 244 transitions. [2019-12-18 15:37:40,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:37:40,841 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:40,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:40,842 INFO L225 Difference]: With dead ends: 116 [2019-12-18 15:37:40,843 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 15:37:40,843 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-18 15:37:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 15:37:40,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2019-12-18 15:37:40,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-18 15:37:40,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 190 transitions. [2019-12-18 15:37:40,849 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 190 transitions. Word has length 11 [2019-12-18 15:37:40,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:40,850 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 190 transitions. [2019-12-18 15:37:40,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:40,851 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 190 transitions. [2019-12-18 15:37:40,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:40,852 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:40,852 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:41,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:41,056 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:41,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:41,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385584, now seen corresponding path program 21 times [2019-12-18 15:37:41,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:41,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347677661] [2019-12-18 15:37:41,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:41,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347677661] [2019-12-18 15:37:41,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707456267] [2019-12-18 15:37:41,118 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:41,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:37:41,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:41,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 15:37:41,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:41,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:41,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-18 15:37:41,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279296546] [2019-12-18 15:37:41,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 15:37:41,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:41,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 15:37:41,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 15:37:41,220 INFO L87 Difference]: Start difference. First operand 87 states and 190 transitions. Second operand 12 states. [2019-12-18 15:37:41,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:41,372 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-18 15:37:41,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:37:41,372 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-18 15:37:41,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:41,373 INFO L225 Difference]: With dead ends: 115 [2019-12-18 15:37:41,373 INFO L226 Difference]: Without dead ends: 114 [2019-12-18 15:37:41,374 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:37:41,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-18 15:37:41,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2019-12-18 15:37:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-18 15:37:41,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-18 15:37:41,377 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-18 15:37:41,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:41,377 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-18 15:37:41,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 15:37:41,378 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-18 15:37:41,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 15:37:41,378 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:41,378 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:41,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:41,583 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:41,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:41,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-18 15:37:41,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:41,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869896612] [2019-12-18 15:37:41,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:41,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869896612] [2019-12-18 15:37:41,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630788668] [2019-12-18 15:37:41,688 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:41,749 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:37:41,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:41,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:41,751 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:41,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:41,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:41,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973415058] [2019-12-18 15:37:41,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:41,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:41,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:41,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:41,857 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 14 states. [2019-12-18 15:37:42,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:42,040 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-18 15:37:42,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:42,040 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-18 15:37:42,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:42,042 INFO L225 Difference]: With dead ends: 107 [2019-12-18 15:37:42,042 INFO L226 Difference]: Without dead ends: 106 [2019-12-18 15:37:42,042 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-12-18 15:37:42,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-18 15:37:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-18 15:37:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-18 15:37:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-18 15:37:42,048 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-18 15:37:42,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:42,048 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-18 15:37:42,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:42,049 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-18 15:37:42,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:42,049 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:42,050 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:42,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:42,254 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:42,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-18 15:37:42,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:42,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111662564] [2019-12-18 15:37:42,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:42,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111662564] [2019-12-18 15:37:42,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713478855] [2019-12-18 15:37:42,340 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:42,393 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 15:37:42,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:42,394 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 15:37:42,395 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:42,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 15:37:42,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2019-12-18 15:37:42,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529836982] [2019-12-18 15:37:42,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 15:37:42,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:42,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 15:37:42,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-12-18 15:37:42,483 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 8 states. [2019-12-18 15:37:42,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:42,518 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2019-12-18 15:37:42,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:42,518 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-18 15:37:42,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:42,520 INFO L225 Difference]: With dead ends: 124 [2019-12-18 15:37:42,520 INFO L226 Difference]: Without dead ends: 115 [2019-12-18 15:37:42,521 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-12-18 15:37:42,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-18 15:37:42,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-12-18 15:37:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-18 15:37:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 274 transitions. [2019-12-18 15:37:42,528 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 274 transitions. Word has length 12 [2019-12-18 15:37:42,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:42,528 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 274 transitions. [2019-12-18 15:37:42,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 15:37:42,528 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 274 transitions. [2019-12-18 15:37:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:42,529 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:42,529 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:42,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:42,734 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:42,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:42,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 22 times [2019-12-18 15:37:42,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:42,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352643865] [2019-12-18 15:37:42,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:42,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352643865] [2019-12-18 15:37:42,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594670410] [2019-12-18 15:37:42,842 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:42,915 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:42,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:42,917 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:42,918 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:43,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:43,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:43,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683886342] [2019-12-18 15:37:43,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:43,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:43,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:43,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:43,049 INFO L87 Difference]: Start difference. First operand 115 states and 274 transitions. Second operand 14 states. [2019-12-18 15:37:43,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:43,234 INFO L93 Difference]: Finished difference Result 133 states and 305 transitions. [2019-12-18 15:37:43,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:43,235 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:43,236 INFO L225 Difference]: With dead ends: 133 [2019-12-18 15:37:43,237 INFO L226 Difference]: Without dead ends: 132 [2019-12-18 15:37:43,237 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2019-12-18 15:37:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-18 15:37:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 117. [2019-12-18 15:37:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-18 15:37:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 279 transitions. [2019-12-18 15:37:43,241 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 279 transitions. Word has length 12 [2019-12-18 15:37:43,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:43,242 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 279 transitions. [2019-12-18 15:37:43,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 279 transitions. [2019-12-18 15:37:43,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:43,243 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:43,243 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:43,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:43,447 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:43,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:43,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 23 times [2019-12-18 15:37:43,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:43,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736569896] [2019-12-18 15:37:43,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:43,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736569896] [2019-12-18 15:37:43,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950287144] [2019-12-18 15:37:43,528 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:43,576 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:43,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:43,577 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:43,578 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:43,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:43,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:43,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352340365] [2019-12-18 15:37:43,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:43,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:43,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:43,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:43,658 INFO L87 Difference]: Start difference. First operand 117 states and 279 transitions. Second operand 14 states. [2019-12-18 15:37:43,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:43,787 INFO L93 Difference]: Finished difference Result 140 states and 321 transitions. [2019-12-18 15:37:43,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:43,788 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:43,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:43,789 INFO L225 Difference]: With dead ends: 140 [2019-12-18 15:37:43,789 INFO L226 Difference]: Without dead ends: 139 [2019-12-18 15:37:43,790 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2019-12-18 15:37:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-18 15:37:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2019-12-18 15:37:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-18 15:37:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 283 transitions. [2019-12-18 15:37:43,795 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 283 transitions. Word has length 12 [2019-12-18 15:37:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:43,795 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 283 transitions. [2019-12-18 15:37:43,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 283 transitions. [2019-12-18 15:37:43,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:43,796 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:43,796 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:43,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:43,999 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:43,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:44,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 24 times [2019-12-18 15:37:44,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:44,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044411895] [2019-12-18 15:37:44,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:44,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044411895] [2019-12-18 15:37:44,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323892095] [2019-12-18 15:37:44,074 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:44,133 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:37:44,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:44,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:44,135 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:44,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:44,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:44,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012890580] [2019-12-18 15:37:44,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:44,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:44,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:44,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:44,458 INFO L87 Difference]: Start difference. First operand 118 states and 283 transitions. Second operand 14 states. [2019-12-18 15:37:44,866 WARN L192 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-18 15:37:45,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:45,021 INFO L93 Difference]: Finished difference Result 142 states and 323 transitions. [2019-12-18 15:37:45,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:37:45,022 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:45,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:45,023 INFO L225 Difference]: With dead ends: 142 [2019-12-18 15:37:45,023 INFO L226 Difference]: Without dead ends: 141 [2019-12-18 15:37:45,024 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2019-12-18 15:37:45,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-18 15:37:45,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 119. [2019-12-18 15:37:45,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-18 15:37:45,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 284 transitions. [2019-12-18 15:37:45,028 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 284 transitions. Word has length 12 [2019-12-18 15:37:45,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:45,028 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 284 transitions. [2019-12-18 15:37:45,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:45,028 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 284 transitions. [2019-12-18 15:37:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:45,029 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:45,029 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:45,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:45,233 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:45,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 25 times [2019-12-18 15:37:45,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:45,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638184579] [2019-12-18 15:37:45,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:45,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638184579] [2019-12-18 15:37:45,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928236981] [2019-12-18 15:37:45,299 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:45,351 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:45,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:45,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:45,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:45,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032749526] [2019-12-18 15:37:45,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:45,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:45,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:45,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:45,438 INFO L87 Difference]: Start difference. First operand 119 states and 284 transitions. Second operand 14 states. [2019-12-18 15:37:45,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:45,565 INFO L93 Difference]: Finished difference Result 142 states and 326 transitions. [2019-12-18 15:37:45,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:45,571 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:45,572 INFO L225 Difference]: With dead ends: 142 [2019-12-18 15:37:45,572 INFO L226 Difference]: Without dead ends: 141 [2019-12-18 15:37:45,573 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2019-12-18 15:37:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-18 15:37:45,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2019-12-18 15:37:45,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-18 15:37:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 292 transitions. [2019-12-18 15:37:45,577 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 292 transitions. Word has length 12 [2019-12-18 15:37:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:45,577 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 292 transitions. [2019-12-18 15:37:45,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 292 transitions. [2019-12-18 15:37:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:45,578 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:45,578 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:45,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:45,782 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:45,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 26 times [2019-12-18 15:37:45,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:45,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554269892] [2019-12-18 15:37:45,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:45,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554269892] [2019-12-18 15:37:45,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115531175] [2019-12-18 15:37:45,837 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:45,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:45,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:45,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:45,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:45,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:45,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:45,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327466374] [2019-12-18 15:37:45,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:45,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:45,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:45,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:45,976 INFO L87 Difference]: Start difference. First operand 121 states and 292 transitions. Second operand 14 states. [2019-12-18 15:37:46,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:46,893 INFO L93 Difference]: Finished difference Result 153 states and 349 transitions. [2019-12-18 15:37:46,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 15:37:46,893 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:46,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:46,895 INFO L225 Difference]: With dead ends: 153 [2019-12-18 15:37:46,895 INFO L226 Difference]: Without dead ends: 152 [2019-12-18 15:37:46,895 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2019-12-18 15:37:46,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-18 15:37:46,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 120. [2019-12-18 15:37:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-18 15:37:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 288 transitions. [2019-12-18 15:37:46,900 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 288 transitions. Word has length 12 [2019-12-18 15:37:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:46,900 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 288 transitions. [2019-12-18 15:37:46,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 288 transitions. [2019-12-18 15:37:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:46,901 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:46,901 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:47,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:47,105 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:47,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 27 times [2019-12-18 15:37:47,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:47,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857098114] [2019-12-18 15:37:47,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:47,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857098114] [2019-12-18 15:37:47,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974431729] [2019-12-18 15:37:47,169 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:47,217 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:37:47,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:47,218 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:47,219 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:47,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:47,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:47,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416268319] [2019-12-18 15:37:47,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:47,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:47,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:47,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:47,359 INFO L87 Difference]: Start difference. First operand 120 states and 288 transitions. Second operand 14 states. [2019-12-18 15:37:48,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:48,459 INFO L93 Difference]: Finished difference Result 158 states and 360 transitions. [2019-12-18 15:37:48,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:37:48,460 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:48,461 INFO L225 Difference]: With dead ends: 158 [2019-12-18 15:37:48,461 INFO L226 Difference]: Without dead ends: 157 [2019-12-18 15:37:48,461 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2019-12-18 15:37:48,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-12-18 15:37:48,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 121. [2019-12-18 15:37:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-18 15:37:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 292 transitions. [2019-12-18 15:37:48,464 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 292 transitions. Word has length 12 [2019-12-18 15:37:48,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:48,464 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 292 transitions. [2019-12-18 15:37:48,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:48,464 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 292 transitions. [2019-12-18 15:37:48,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:48,465 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:48,465 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:48,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:48,665 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:48,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:48,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 28 times [2019-12-18 15:37:48,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:48,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210030] [2019-12-18 15:37:48,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:48,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210030] [2019-12-18 15:37:48,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702717741] [2019-12-18 15:37:48,756 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:48,798 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:48,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:48,799 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:48,799 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:48,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:48,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:48,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186752628] [2019-12-18 15:37:48,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:48,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:48,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:48,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:48,935 INFO L87 Difference]: Start difference. First operand 121 states and 292 transitions. Second operand 14 states. [2019-12-18 15:37:49,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:49,217 INFO L93 Difference]: Finished difference Result 146 states and 333 transitions. [2019-12-18 15:37:49,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 15:37:49,217 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:49,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:49,218 INFO L225 Difference]: With dead ends: 146 [2019-12-18 15:37:49,218 INFO L226 Difference]: Without dead ends: 145 [2019-12-18 15:37:49,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2019-12-18 15:37:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-18 15:37:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 121. [2019-12-18 15:37:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-18 15:37:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 289 transitions. [2019-12-18 15:37:49,223 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 289 transitions. Word has length 12 [2019-12-18 15:37:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:49,223 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 289 transitions. [2019-12-18 15:37:49,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:49,223 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 289 transitions. [2019-12-18 15:37:49,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:49,224 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:49,224 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:49,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:49,427 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:49,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:49,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1750434070, now seen corresponding path program 29 times [2019-12-18 15:37:49,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:49,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238441840] [2019-12-18 15:37:49,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:49,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238441840] [2019-12-18 15:37:49,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505682762] [2019-12-18 15:37:49,497 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:49,539 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:37:49,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:49,540 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:49,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:49,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:49,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:49,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120611916] [2019-12-18 15:37:49,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:49,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:49,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:49,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:49,613 INFO L87 Difference]: Start difference. First operand 121 states and 289 transitions. Second operand 14 states. [2019-12-18 15:37:49,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:49,727 INFO L93 Difference]: Finished difference Result 143 states and 324 transitions. [2019-12-18 15:37:49,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:37:49,728 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:49,729 INFO L225 Difference]: With dead ends: 143 [2019-12-18 15:37:49,730 INFO L226 Difference]: Without dead ends: 142 [2019-12-18 15:37:49,730 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2019-12-18 15:37:49,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-18 15:37:49,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2019-12-18 15:37:49,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 15:37:49,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-18 15:37:49,734 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-18 15:37:49,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:49,735 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-18 15:37:49,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:49,735 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-18 15:37:49,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:49,735 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:49,736 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:49,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:49,939 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:49,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:49,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1750433915, now seen corresponding path program 30 times [2019-12-18 15:37:49,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:49,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143242392] [2019-12-18 15:37:49,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:50,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143242392] [2019-12-18 15:37:50,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137638600] [2019-12-18 15:37:50,007 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:50,050 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:37:50,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:50,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:50,052 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:50,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:50,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:50,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705445531] [2019-12-18 15:37:50,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:50,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:50,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:50,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:50,131 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 14 states. [2019-12-18 15:37:50,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:50,314 INFO L93 Difference]: Finished difference Result 159 states and 361 transitions. [2019-12-18 15:37:50,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:37:50,315 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:50,316 INFO L225 Difference]: With dead ends: 159 [2019-12-18 15:37:50,316 INFO L226 Difference]: Without dead ends: 158 [2019-12-18 15:37:50,317 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2019-12-18 15:37:50,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-18 15:37:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 124. [2019-12-18 15:37:50,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 15:37:50,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 298 transitions. [2019-12-18 15:37:50,321 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 298 transitions. Word has length 12 [2019-12-18 15:37:50,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:50,322 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 298 transitions. [2019-12-18 15:37:50,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:50,322 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 298 transitions. [2019-12-18 15:37:50,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:50,322 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:50,322 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:50,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:50,526 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:50,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:50,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 31 times [2019-12-18 15:37:50,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:50,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441671379] [2019-12-18 15:37:50,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:50,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441671379] [2019-12-18 15:37:50,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136881054] [2019-12-18 15:37:50,586 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:50,627 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:50,628 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:50,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:50,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:50,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386150610] [2019-12-18 15:37:50,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:50,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:50,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:50,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:50,824 INFO L87 Difference]: Start difference. First operand 124 states and 298 transitions. Second operand 14 states. [2019-12-18 15:37:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:52,026 INFO L93 Difference]: Finished difference Result 170 states and 378 transitions. [2019-12-18 15:37:52,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:37:52,026 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:52,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:52,027 INFO L225 Difference]: With dead ends: 170 [2019-12-18 15:37:52,027 INFO L226 Difference]: Without dead ends: 169 [2019-12-18 15:37:52,028 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=298, Unknown=1, NotChecked=0, Total=462 [2019-12-18 15:37:52,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-12-18 15:37:52,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 125. [2019-12-18 15:37:52,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 15:37:52,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-18 15:37:52,033 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-18 15:37:52,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:52,033 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-18 15:37:52,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:52,033 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-18 15:37:52,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:52,034 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:52,034 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:52,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:52,237 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:52,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:52,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 32 times [2019-12-18 15:37:52,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:52,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265769878] [2019-12-18 15:37:52,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:52,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265769878] [2019-12-18 15:37:52,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464824132] [2019-12-18 15:37:52,296 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:52,335 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:52,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:52,336 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:52,337 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:52,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:52,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:52,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652317476] [2019-12-18 15:37:52,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:52,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:52,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:52,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:52,411 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 14 states. [2019-12-18 15:37:52,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:52,693 INFO L93 Difference]: Finished difference Result 167 states and 376 transitions. [2019-12-18 15:37:52,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:37:52,694 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:52,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:52,695 INFO L225 Difference]: With dead ends: 167 [2019-12-18 15:37:52,695 INFO L226 Difference]: Without dead ends: 165 [2019-12-18 15:37:52,696 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2019-12-18 15:37:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-18 15:37:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2019-12-18 15:37:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 15:37:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-18 15:37:52,701 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-18 15:37:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:52,701 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-18 15:37:52,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:52,701 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-18 15:37:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:52,702 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:52,702 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:52,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:52,905 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:52,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:52,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 33 times [2019-12-18 15:37:52,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:52,907 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836585264] [2019-12-18 15:37:52,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:52,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836585264] [2019-12-18 15:37:52,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419514837] [2019-12-18 15:37:52,973 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:53,024 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:37:53,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:53,025 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:53,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:53,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:53,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:53,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721717336] [2019-12-18 15:37:53,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:53,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:53,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:53,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:53,113 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-18 15:37:53,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:53,313 INFO L93 Difference]: Finished difference Result 169 states and 380 transitions. [2019-12-18 15:37:53,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:37:53,314 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:53,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:53,315 INFO L225 Difference]: With dead ends: 169 [2019-12-18 15:37:53,315 INFO L226 Difference]: Without dead ends: 168 [2019-12-18 15:37:53,316 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:37:53,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-12-18 15:37:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 127. [2019-12-18 15:37:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-18 15:37:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-18 15:37:53,320 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-18 15:37:53,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:53,320 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-18 15:37:53,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-18 15:37:53,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:53,321 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:53,321 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:53,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:53,524 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:53,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:53,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 34 times [2019-12-18 15:37:53,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:53,525 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569441841] [2019-12-18 15:37:53,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:53,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569441841] [2019-12-18 15:37:53,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548287927] [2019-12-18 15:37:53,588 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:53,629 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:53,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:53,630 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:53,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:53,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:53,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:53,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752775157] [2019-12-18 15:37:53,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:53,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:53,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:53,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:53,706 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 14 states. [2019-12-18 15:37:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:53,937 INFO L93 Difference]: Finished difference Result 166 states and 380 transitions. [2019-12-18 15:37:53,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:37:53,938 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:53,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:53,939 INFO L225 Difference]: With dead ends: 166 [2019-12-18 15:37:53,939 INFO L226 Difference]: Without dead ends: 165 [2019-12-18 15:37:53,940 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:37:53,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-12-18 15:37:53,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2019-12-18 15:37:53,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 15:37:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-18 15:37:53,945 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-18 15:37:53,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:53,945 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-18 15:37:53,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:53,945 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-18 15:37:53,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:53,946 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:53,946 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:54,149 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:54,149 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:54,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:54,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 35 times [2019-12-18 15:37:54,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:54,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546126499] [2019-12-18 15:37:54,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:54,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546126499] [2019-12-18 15:37:54,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131332666] [2019-12-18 15:37:54,213 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:54,254 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:54,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:54,255 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:54,256 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:54,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:54,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:54,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641946483] [2019-12-18 15:37:54,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:54,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:54,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:54,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:54,329 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-18 15:37:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:54,512 INFO L93 Difference]: Finished difference Result 163 states and 371 transitions. [2019-12-18 15:37:54,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 15:37:54,512 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:54,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:54,514 INFO L225 Difference]: With dead ends: 163 [2019-12-18 15:37:54,514 INFO L226 Difference]: Without dead ends: 162 [2019-12-18 15:37:54,515 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:37:54,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-18 15:37:54,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 124. [2019-12-18 15:37:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 15:37:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-18 15:37:54,519 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-18 15:37:54,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:54,519 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-18 15:37:54,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:54,519 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-18 15:37:54,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:54,520 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:54,520 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:54,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:54,723 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:54,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:54,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1542513096, now seen corresponding path program 36 times [2019-12-18 15:37:54,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:54,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400634454] [2019-12-18 15:37:54,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:54,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400634454] [2019-12-18 15:37:54,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983396518] [2019-12-18 15:37:54,791 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:54,841 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:37:54,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:54,842 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:54,843 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:54,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:54,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:54,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835285608] [2019-12-18 15:37:54,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:54,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:54,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:54,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:54,971 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 14 states. [2019-12-18 15:37:55,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:55,181 INFO L93 Difference]: Finished difference Result 152 states and 342 transitions. [2019-12-18 15:37:55,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:37:55,181 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:55,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:55,183 INFO L225 Difference]: With dead ends: 152 [2019-12-18 15:37:55,183 INFO L226 Difference]: Without dead ends: 151 [2019-12-18 15:37:55,183 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:37:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-18 15:37:55,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 124. [2019-12-18 15:37:55,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 15:37:55,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-18 15:37:55,188 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-18 15:37:55,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:55,188 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-18 15:37:55,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:55,188 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-18 15:37:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:55,189 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:55,189 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:55,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:55,392 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:55,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:55,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517746, now seen corresponding path program 37 times [2019-12-18 15:37:55,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:55,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357835590] [2019-12-18 15:37:55,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:55,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357835590] [2019-12-18 15:37:55,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696253040] [2019-12-18 15:37:55,468 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:55,515 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:55,515 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:55,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:55,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:55,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956338879] [2019-12-18 15:37:55,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:55,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:55,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:55,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:55,592 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 14 states. [2019-12-18 15:37:57,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:57,729 INFO L93 Difference]: Finished difference Result 167 states and 372 transitions. [2019-12-18 15:37:57,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:37:57,730 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:57,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:57,732 INFO L225 Difference]: With dead ends: 167 [2019-12-18 15:37:57,732 INFO L226 Difference]: Without dead ends: 166 [2019-12-18 15:37:57,732 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=303, Unknown=1, NotChecked=0, Total=462 [2019-12-18 15:37:57,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-18 15:37:57,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 125. [2019-12-18 15:37:57,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-18 15:37:57,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-18 15:37:57,736 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 12 [2019-12-18 15:37:57,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:57,736 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-18 15:37:57,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:57,736 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-18 15:37:57,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:57,737 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:57,737 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:57,940 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:57,940 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:57,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517901, now seen corresponding path program 38 times [2019-12-18 15:37:57,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:57,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447236963] [2019-12-18 15:37:57,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:58,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447236963] [2019-12-18 15:37:58,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151472363] [2019-12-18 15:37:58,014 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:58,055 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:37:58,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:58,056 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:58,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:58,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:58,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:58,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602100145] [2019-12-18 15:37:58,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:58,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:58,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:58,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:58,151 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 14 states. [2019-12-18 15:37:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:58,421 INFO L93 Difference]: Finished difference Result 160 states and 359 transitions. [2019-12-18 15:37:58,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:37:58,422 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:58,423 INFO L225 Difference]: With dead ends: 160 [2019-12-18 15:37:58,423 INFO L226 Difference]: Without dead ends: 159 [2019-12-18 15:37:58,424 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2019-12-18 15:37:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-18 15:37:58,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 124. [2019-12-18 15:37:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-18 15:37:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-18 15:37:58,428 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-18 15:37:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:58,429 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-18 15:37:58,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:58,429 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-18 15:37:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:58,429 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:58,430 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:58,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:58,633 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:58,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1542661896, now seen corresponding path program 39 times [2019-12-18 15:37:58,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:58,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229019927] [2019-12-18 15:37:58,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:58,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229019927] [2019-12-18 15:37:58,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754435376] [2019-12-18 15:37:58,735 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:58,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:37:58,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:58,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:58,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:58,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:58,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:58,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214576604] [2019-12-18 15:37:58,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:58,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:58,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:58,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:58,877 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 14 states. [2019-12-18 15:37:59,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:37:59,224 INFO L93 Difference]: Finished difference Result 162 states and 361 transitions. [2019-12-18 15:37:59,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:37:59,225 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:37:59,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:37:59,226 INFO L225 Difference]: With dead ends: 162 [2019-12-18 15:37:59,227 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 15:37:59,227 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-12-18 15:37:59,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 15:37:59,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 126. [2019-12-18 15:37:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 15:37:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-18 15:37:59,232 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-18 15:37:59,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:37:59,232 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-18 15:37:59,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:37:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-18 15:37:59,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:37:59,233 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:37:59,233 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:37:59,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:59,437 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:37:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:37:59,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1542662051, now seen corresponding path program 40 times [2019-12-18 15:37:59,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:37:59,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499974121] [2019-12-18 15:37:59,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:37:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:37:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:59,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499974121] [2019-12-18 15:37:59,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242553196] [2019-12-18 15:37:59,504 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:37:59,543 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:37:59,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:37:59,544 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:37:59,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:37:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:37:59,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:37:59,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:37:59,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944473500] [2019-12-18 15:37:59,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:37:59,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:37:59,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:37:59,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:37:59,644 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-18 15:38:00,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:00,508 INFO L93 Difference]: Finished difference Result 178 states and 396 transitions. [2019-12-18 15:38:00,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:00,509 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:38:00,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:00,510 INFO L225 Difference]: With dead ends: 178 [2019-12-18 15:38:00,510 INFO L226 Difference]: Without dead ends: 176 [2019-12-18 15:38:00,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:38:00,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-18 15:38:00,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2019-12-18 15:38:00,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-18 15:38:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-18 15:38:00,514 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-18 15:38:00,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:00,515 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-18 15:38:00,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:38:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-18 15:38:00,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:38:00,515 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:00,515 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:00,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:00,717 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:00,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666701, now seen corresponding path program 41 times [2019-12-18 15:38:00,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:00,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670861684] [2019-12-18 15:38:00,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:00,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670861684] [2019-12-18 15:38:00,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508353324] [2019-12-18 15:38:00,775 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:00,823 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:38:00,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:00,824 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:38:00,824 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:00,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:00,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:38:00,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23737378] [2019-12-18 15:38:00,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:38:00,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:00,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:38:00,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:38:00,914 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 14 states. [2019-12-18 15:38:01,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:01,449 INFO L93 Difference]: Finished difference Result 178 states and 393 transitions. [2019-12-18 15:38:01,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:38:01,450 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:38:01,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:01,452 INFO L225 Difference]: With dead ends: 178 [2019-12-18 15:38:01,452 INFO L226 Difference]: Without dead ends: 176 [2019-12-18 15:38:01,452 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-18 15:38:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-18 15:38:01,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127. [2019-12-18 15:38:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-18 15:38:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-18 15:38:01,456 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-18 15:38:01,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:01,456 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-18 15:38:01,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:38:01,456 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-18 15:38:01,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:38:01,457 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:01,457 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:01,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:01,660 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:01,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130546, now seen corresponding path program 42 times [2019-12-18 15:38:01,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:01,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516381674] [2019-12-18 15:38:01,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:01,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516381674] [2019-12-18 15:38:01,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868570485] [2019-12-18 15:38:01,747 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:01,792 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:38:01,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:01,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:38:01,794 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:01,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:01,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:38:01,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120499419] [2019-12-18 15:38:01,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:38:01,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:01,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:38:01,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:38:01,870 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 14 states. [2019-12-18 15:38:02,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:02,133 INFO L93 Difference]: Finished difference Result 161 states and 369 transitions. [2019-12-18 15:38:02,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:02,134 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:38:02,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:02,135 INFO L225 Difference]: With dead ends: 161 [2019-12-18 15:38:02,135 INFO L226 Difference]: Without dead ends: 160 [2019-12-18 15:38:02,136 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:38:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-18 15:38:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 129. [2019-12-18 15:38:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-18 15:38:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2019-12-18 15:38:02,140 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2019-12-18 15:38:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:02,140 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2019-12-18 15:38:02,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:38:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2019-12-18 15:38:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:38:02,141 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:02,141 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:02,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:02,342 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:02,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130701, now seen corresponding path program 43 times [2019-12-18 15:38:02,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:02,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325099552] [2019-12-18 15:38:02,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:02,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325099552] [2019-12-18 15:38:02,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934383858] [2019-12-18 15:38:02,431 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:02,473 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:38:02,474 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:02,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:02,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:38:02,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251376032] [2019-12-18 15:38:02,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:38:02,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:02,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:38:02,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:38:02,542 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 14 states. [2019-12-18 15:38:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:02,818 INFO L93 Difference]: Finished difference Result 179 states and 405 transitions. [2019-12-18 15:38:02,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:38:02,819 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:38:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:02,820 INFO L225 Difference]: With dead ends: 179 [2019-12-18 15:38:02,820 INFO L226 Difference]: Without dead ends: 178 [2019-12-18 15:38:02,821 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-12-18 15:38:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-18 15:38:02,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 128. [2019-12-18 15:38:02,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-18 15:38:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 311 transitions. [2019-12-18 15:38:02,828 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 311 transitions. Word has length 12 [2019-12-18 15:38:02,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:02,828 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 311 transitions. [2019-12-18 15:38:02,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:38:02,828 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 311 transitions. [2019-12-18 15:38:02,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:38:02,829 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:02,829 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:03,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:03,032 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:03,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:03,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 44 times [2019-12-18 15:38:03,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:03,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585292146] [2019-12-18 15:38:03,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:03,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585292146] [2019-12-18 15:38:03,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869710934] [2019-12-18 15:38:03,090 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:03,143 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:38:03,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:03,144 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:38:03,145 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:03,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:03,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:38:03,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611263146] [2019-12-18 15:38:03,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:38:03,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:03,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:38:03,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:38:03,226 INFO L87 Difference]: Start difference. First operand 128 states and 311 transitions. Second operand 14 states. [2019-12-18 15:38:03,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:03,504 INFO L93 Difference]: Finished difference Result 182 states and 409 transitions. [2019-12-18 15:38:03,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:38:03,505 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:38:03,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:03,506 INFO L225 Difference]: With dead ends: 182 [2019-12-18 15:38:03,506 INFO L226 Difference]: Without dead ends: 180 [2019-12-18 15:38:03,507 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2019-12-18 15:38:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-12-18 15:38:03,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 129. [2019-12-18 15:38:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-18 15:38:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2019-12-18 15:38:03,511 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2019-12-18 15:38:03,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:03,511 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2019-12-18 15:38:03,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:38:03,511 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2019-12-18 15:38:03,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:38:03,512 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:03,512 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:03,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:03,713 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:03,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:03,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135506, now seen corresponding path program 45 times [2019-12-18 15:38:03,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:03,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784305432] [2019-12-18 15:38:03,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:03,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784305432] [2019-12-18 15:38:03,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065365530] [2019-12-18 15:38:03,772 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:03,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:38:03,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:03,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:38:03,813 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:03,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:03,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:38:03,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844599859] [2019-12-18 15:38:03,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:38:03,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:03,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:38:03,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:38:03,890 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 14 states. [2019-12-18 15:38:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:04,146 INFO L93 Difference]: Finished difference Result 179 states and 406 transitions. [2019-12-18 15:38:04,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:04,146 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:38:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:04,148 INFO L225 Difference]: With dead ends: 179 [2019-12-18 15:38:04,148 INFO L226 Difference]: Without dead ends: 177 [2019-12-18 15:38:04,148 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2019-12-18 15:38:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-18 15:38:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-18 15:38:04,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-18 15:38:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 311 transitions. [2019-12-18 15:38:04,151 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 311 transitions. Word has length 12 [2019-12-18 15:38:04,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:04,152 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 311 transitions. [2019-12-18 15:38:04,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:38:04,152 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 311 transitions. [2019-12-18 15:38:04,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:38:04,153 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:04,153 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:04,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:04,356 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:04,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:04,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279656, now seen corresponding path program 46 times [2019-12-18 15:38:04,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:04,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749555694] [2019-12-18 15:38:04,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:04,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749555694] [2019-12-18 15:38:04,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130489079] [2019-12-18 15:38:04,423 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:04,464 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:38:04,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:04,465 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 15:38:04,466 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:04,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:04,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-18 15:38:04,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877920668] [2019-12-18 15:38:04,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 15:38:04,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:04,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 15:38:04,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-18 15:38:04,571 INFO L87 Difference]: Start difference. First operand 131 states and 311 transitions. Second operand 14 states. [2019-12-18 15:38:05,085 WARN L192 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2019-12-18 15:38:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:05,329 INFO L93 Difference]: Finished difference Result 176 states and 396 transitions. [2019-12-18 15:38:05,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:38:05,329 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-18 15:38:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:05,331 INFO L225 Difference]: With dead ends: 176 [2019-12-18 15:38:05,331 INFO L226 Difference]: Without dead ends: 175 [2019-12-18 15:38:05,331 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2019-12-18 15:38:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-18 15:38:05,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 128. [2019-12-18 15:38:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-18 15:38:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 299 transitions. [2019-12-18 15:38:05,335 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 299 transitions. Word has length 12 [2019-12-18 15:38:05,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:05,335 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 299 transitions. [2019-12-18 15:38:05,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 15:38:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 299 transitions. [2019-12-18 15:38:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 15:38:05,336 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:05,336 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:05,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:05,539 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:05,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:05,539 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-18 15:38:05,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:05,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726558860] [2019-12-18 15:38:05,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:05,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726558860] [2019-12-18 15:38:05,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794612118] [2019-12-18 15:38:05,650 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:05,693 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 15:38:05,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:05,694 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:05,694 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:05,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:05,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:05,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641808295] [2019-12-18 15:38:05,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:05,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:05,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:05,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:05,774 INFO L87 Difference]: Start difference. First operand 128 states and 299 transitions. Second operand 16 states. [2019-12-18 15:38:05,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:05,920 INFO L93 Difference]: Finished difference Result 143 states and 324 transitions. [2019-12-18 15:38:05,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:38:05,920 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-18 15:38:05,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:05,922 INFO L225 Difference]: With dead ends: 143 [2019-12-18 15:38:05,922 INFO L226 Difference]: Without dead ends: 142 [2019-12-18 15:38:05,922 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:38:05,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-18 15:38:05,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 133. [2019-12-18 15:38:05,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-18 15:38:05,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 313 transitions. [2019-12-18 15:38:05,926 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 313 transitions. Word has length 12 [2019-12-18 15:38:05,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:05,927 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 313 transitions. [2019-12-18 15:38:05,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:05,927 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 313 transitions. [2019-12-18 15:38:05,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:05,928 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:05,928 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:06,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:06,131 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:06,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:06,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 47 times [2019-12-18 15:38:06,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:06,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902366231] [2019-12-18 15:38:06,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:06,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902366231] [2019-12-18 15:38:06,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452401502] [2019-12-18 15:38:06,192 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:06,237 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:38:06,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:06,237 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:06,238 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:06,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:06,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:06,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804129585] [2019-12-18 15:38:06,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:06,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:06,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:06,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:06,333 INFO L87 Difference]: Start difference. First operand 133 states and 313 transitions. Second operand 16 states. [2019-12-18 15:38:06,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:06,493 INFO L93 Difference]: Finished difference Result 154 states and 348 transitions. [2019-12-18 15:38:06,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:38:06,494 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:06,495 INFO L225 Difference]: With dead ends: 154 [2019-12-18 15:38:06,495 INFO L226 Difference]: Without dead ends: 152 [2019-12-18 15:38:06,496 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:38:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-18 15:38:06,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2019-12-18 15:38:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-18 15:38:06,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 314 transitions. [2019-12-18 15:38:06,500 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 314 transitions. Word has length 13 [2019-12-18 15:38:06,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:06,500 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 314 transitions. [2019-12-18 15:38:06,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:06,500 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 314 transitions. [2019-12-18 15:38:06,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:06,501 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:06,501 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:06,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:06,702 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:06,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:06,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 48 times [2019-12-18 15:38:06,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:06,703 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488442741] [2019-12-18 15:38:06,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:06,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488442741] [2019-12-18 15:38:06,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930055872] [2019-12-18 15:38:06,786 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:06,834 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:38:06,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:06,835 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:06,835 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:06,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:06,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:06,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098539445] [2019-12-18 15:38:06,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:06,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:06,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:06,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:06,922 INFO L87 Difference]: Start difference. First operand 133 states and 314 transitions. Second operand 16 states. [2019-12-18 15:38:07,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:07,088 INFO L93 Difference]: Finished difference Result 163 states and 369 transitions. [2019-12-18 15:38:07,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:38:07,088 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:07,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:07,089 INFO L225 Difference]: With dead ends: 163 [2019-12-18 15:38:07,090 INFO L226 Difference]: Without dead ends: 162 [2019-12-18 15:38:07,090 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:38:07,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-18 15:38:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2019-12-18 15:38:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 15:38:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 318 transitions. [2019-12-18 15:38:07,094 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 318 transitions. Word has length 13 [2019-12-18 15:38:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:07,094 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 318 transitions. [2019-12-18 15:38:07,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:07,094 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 318 transitions. [2019-12-18 15:38:07,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:07,095 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:07,095 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:07,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:07,296 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:07,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:07,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 49 times [2019-12-18 15:38:07,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:07,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880472537] [2019-12-18 15:38:07,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:07,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880472537] [2019-12-18 15:38:07,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394038242] [2019-12-18 15:38:07,372 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:07,423 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:07,423 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:10,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:10,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:10,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104645620] [2019-12-18 15:38:10,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:10,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:10,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:10,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=153, Unknown=2, NotChecked=0, Total=240 [2019-12-18 15:38:10,123 INFO L87 Difference]: Start difference. First operand 134 states and 318 transitions. Second operand 16 states. [2019-12-18 15:38:10,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:10,364 INFO L93 Difference]: Finished difference Result 164 states and 368 transitions. [2019-12-18 15:38:10,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:38:10,364 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:10,366 INFO L225 Difference]: With dead ends: 164 [2019-12-18 15:38:10,366 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 15:38:10,366 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=185, Invalid=319, Unknown=2, NotChecked=0, Total=506 [2019-12-18 15:38:10,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 15:38:10,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2019-12-18 15:38:10,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-18 15:38:10,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 317 transitions. [2019-12-18 15:38:10,370 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 317 transitions. Word has length 13 [2019-12-18 15:38:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:10,370 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 317 transitions. [2019-12-18 15:38:10,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:10,370 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 317 transitions. [2019-12-18 15:38:10,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:10,371 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:10,371 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:10,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:10,571 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:10,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:10,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 50 times [2019-12-18 15:38:10,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:10,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481871210] [2019-12-18 15:38:10,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:10,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481871210] [2019-12-18 15:38:10,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227440993] [2019-12-18 15:38:10,651 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:10,694 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:38:10,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:10,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:10,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:10,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:10,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:10,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701142761] [2019-12-18 15:38:10,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:10,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:10,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:10,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:10,791 INFO L87 Difference]: Start difference. First operand 134 states and 317 transitions. Second operand 16 states. [2019-12-18 15:38:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:10,966 INFO L93 Difference]: Finished difference Result 167 states and 378 transitions. [2019-12-18 15:38:10,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:38:10,966 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:10,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:10,968 INFO L225 Difference]: With dead ends: 167 [2019-12-18 15:38:10,968 INFO L226 Difference]: Without dead ends: 166 [2019-12-18 15:38:10,968 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:38:10,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-18 15:38:10,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 136. [2019-12-18 15:38:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-18 15:38:10,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 325 transitions. [2019-12-18 15:38:10,972 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 325 transitions. Word has length 13 [2019-12-18 15:38:10,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:10,972 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 325 transitions. [2019-12-18 15:38:10,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:10,972 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 325 transitions. [2019-12-18 15:38:10,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:10,973 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:10,973 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:11,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:11,177 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:11,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:11,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 51 times [2019-12-18 15:38:11,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:11,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333990009] [2019-12-18 15:38:11,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:11,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333990009] [2019-12-18 15:38:11,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973186824] [2019-12-18 15:38:11,249 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:11,295 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:38:11,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:11,297 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:11,298 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:11,626 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 15:38:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:11,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:11,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:11,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467427645] [2019-12-18 15:38:11,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:11,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:11,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:11,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:11,629 INFO L87 Difference]: Start difference. First operand 136 states and 325 transitions. Second operand 16 states. [2019-12-18 15:38:12,251 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:38:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:12,292 INFO L93 Difference]: Finished difference Result 179 states and 403 transitions. [2019-12-18 15:38:12,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:38:12,293 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:12,294 INFO L225 Difference]: With dead ends: 179 [2019-12-18 15:38:12,294 INFO L226 Difference]: Without dead ends: 178 [2019-12-18 15:38:12,295 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2019-12-18 15:38:12,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-18 15:38:12,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 135. [2019-12-18 15:38:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-18 15:38:12,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 321 transitions. [2019-12-18 15:38:12,299 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 321 transitions. Word has length 13 [2019-12-18 15:38:12,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:12,299 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 321 transitions. [2019-12-18 15:38:12,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:12,300 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 321 transitions. [2019-12-18 15:38:12,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:12,300 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:12,300 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:12,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:12,503 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:12,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:12,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 52 times [2019-12-18 15:38:12,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:12,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322414284] [2019-12-18 15:38:12,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:12,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322414284] [2019-12-18 15:38:12,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010192915] [2019-12-18 15:38:12,584 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:12,637 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:38:12,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:12,638 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:12,639 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:13,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:13,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:13,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690825843] [2019-12-18 15:38:13,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:13,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:13,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:13,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=157, Unknown=1, NotChecked=0, Total=240 [2019-12-18 15:38:13,369 INFO L87 Difference]: Start difference. First operand 135 states and 321 transitions. Second operand 16 states. [2019-12-18 15:38:14,028 WARN L192 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 15:38:14,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:14,239 INFO L93 Difference]: Finished difference Result 188 states and 421 transitions. [2019-12-18 15:38:14,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 15:38:14,243 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:14,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:14,244 INFO L225 Difference]: With dead ends: 188 [2019-12-18 15:38:14,245 INFO L226 Difference]: Without dead ends: 187 [2019-12-18 15:38:14,245 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=197, Invalid=354, Unknown=1, NotChecked=0, Total=552 [2019-12-18 15:38:14,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-18 15:38:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 136. [2019-12-18 15:38:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-18 15:38:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 325 transitions. [2019-12-18 15:38:14,247 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 325 transitions. Word has length 13 [2019-12-18 15:38:14,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:14,248 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 325 transitions. [2019-12-18 15:38:14,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 325 transitions. [2019-12-18 15:38:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:14,248 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:14,249 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:14,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:14,449 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:14,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:14,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 53 times [2019-12-18 15:38:14,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:14,450 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222775859] [2019-12-18 15:38:14,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:14,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222775859] [2019-12-18 15:38:14,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915267014] [2019-12-18 15:38:14,525 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:14,567 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:38:14,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:14,568 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:14,569 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:15,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:15,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:15,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090052504] [2019-12-18 15:38:15,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:15,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:15,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:15,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=151, Unknown=1, NotChecked=0, Total=240 [2019-12-18 15:38:15,229 INFO L87 Difference]: Start difference. First operand 136 states and 325 transitions. Second operand 16 states. [2019-12-18 15:38:16,499 WARN L192 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:38:17,098 WARN L192 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 15:38:17,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:17,118 INFO L93 Difference]: Finished difference Result 168 states and 377 transitions. [2019-12-18 15:38:17,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 15:38:17,118 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:17,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:17,120 INFO L225 Difference]: With dead ends: 168 [2019-12-18 15:38:17,120 INFO L226 Difference]: Without dead ends: 164 [2019-12-18 15:38:17,120 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=212, Invalid=339, Unknown=1, NotChecked=0, Total=552 [2019-12-18 15:38:17,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-18 15:38:17,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 135. [2019-12-18 15:38:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-18 15:38:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 320 transitions. [2019-12-18 15:38:17,124 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 320 transitions. Word has length 13 [2019-12-18 15:38:17,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:17,124 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 320 transitions. [2019-12-18 15:38:17,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 320 transitions. [2019-12-18 15:38:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:17,125 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:17,125 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:17,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:17,326 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:17,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:17,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828976, now seen corresponding path program 54 times [2019-12-18 15:38:17,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:17,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961243231] [2019-12-18 15:38:17,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:17,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961243231] [2019-12-18 15:38:17,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888273993] [2019-12-18 15:38:17,414 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:17,461 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:38:17,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:17,461 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:17,462 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:17,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:17,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:17,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491123977] [2019-12-18 15:38:17,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:17,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:17,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:17,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:17,554 INFO L87 Difference]: Start difference. First operand 135 states and 320 transitions. Second operand 16 states. [2019-12-18 15:38:17,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:17,714 INFO L93 Difference]: Finished difference Result 165 states and 375 transitions. [2019-12-18 15:38:17,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:38:17,714 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:17,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:17,716 INFO L225 Difference]: With dead ends: 165 [2019-12-18 15:38:17,716 INFO L226 Difference]: Without dead ends: 164 [2019-12-18 15:38:17,716 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:38:17,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-18 15:38:17,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 138. [2019-12-18 15:38:17,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:38:17,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-18 15:38:17,720 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-18 15:38:17,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:17,720 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-18 15:38:17,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-18 15:38:17,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:17,721 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:17,721 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:17,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:17,924 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:17,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:17,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 55 times [2019-12-18 15:38:17,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:17,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348933089] [2019-12-18 15:38:17,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:17,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348933089] [2019-12-18 15:38:17,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150450737] [2019-12-18 15:38:17,991 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:18,034 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:18,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:18,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:18,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:18,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968104255] [2019-12-18 15:38:18,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:18,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:18,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:18,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:18,159 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 16 states. [2019-12-18 15:38:18,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:18,460 INFO L93 Difference]: Finished difference Result 190 states and 429 transitions. [2019-12-18 15:38:18,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:38:18,460 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:18,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:18,462 INFO L225 Difference]: With dead ends: 190 [2019-12-18 15:38:18,462 INFO L226 Difference]: Without dead ends: 189 [2019-12-18 15:38:18,462 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:38:18,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-18 15:38:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 137. [2019-12-18 15:38:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 15:38:18,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2019-12-18 15:38:18,466 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 13 [2019-12-18 15:38:18,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:18,466 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2019-12-18 15:38:18,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2019-12-18 15:38:18,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:18,467 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:18,467 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:18,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:18,670 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:18,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:18,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 56 times [2019-12-18 15:38:18,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:18,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247926562] [2019-12-18 15:38:18,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:18,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247926562] [2019-12-18 15:38:18,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909865981] [2019-12-18 15:38:18,744 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:18,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:38:18,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:18,789 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:18,789 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:18,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:18,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:18,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839893525] [2019-12-18 15:38:18,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:18,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:18,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:18,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:18,910 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand 16 states. [2019-12-18 15:38:19,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:19,695 INFO L93 Difference]: Finished difference Result 200 states and 448 transitions. [2019-12-18 15:38:19,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:38:19,695 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:19,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:19,697 INFO L225 Difference]: With dead ends: 200 [2019-12-18 15:38:19,697 INFO L226 Difference]: Without dead ends: 199 [2019-12-18 15:38:19,698 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2019-12-18 15:38:19,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-18 15:38:19,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 138. [2019-12-18 15:38:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:38:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-18 15:38:19,701 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-18 15:38:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:19,701 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-18 15:38:19,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-18 15:38:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:19,702 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:19,702 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:19,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:19,903 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:19,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:19,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 57 times [2019-12-18 15:38:19,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:19,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394112480] [2019-12-18 15:38:19,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:19,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394112480] [2019-12-18 15:38:19,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909220905] [2019-12-18 15:38:19,991 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:20,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 15:38:20,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:20,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:20,039 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:20,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:20,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:20,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244944984] [2019-12-18 15:38:20,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:20,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:20,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:20,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:20,182 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 16 states. [2019-12-18 15:38:20,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:20,676 INFO L93 Difference]: Finished difference Result 195 states and 434 transitions. [2019-12-18 15:38:20,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:20,677 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:20,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:20,678 INFO L225 Difference]: With dead ends: 195 [2019-12-18 15:38:20,678 INFO L226 Difference]: Without dead ends: 189 [2019-12-18 15:38:20,679 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=445, Unknown=0, NotChecked=0, Total=702 [2019-12-18 15:38:20,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-18 15:38:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 138. [2019-12-18 15:38:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:38:20,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 329 transitions. [2019-12-18 15:38:20,683 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 329 transitions. Word has length 13 [2019-12-18 15:38:20,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:20,683 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 329 transitions. [2019-12-18 15:38:20,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 329 transitions. [2019-12-18 15:38:20,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:20,684 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:20,684 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:20,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:20,888 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:20,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:20,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 58 times [2019-12-18 15:38:20,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:20,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515719664] [2019-12-18 15:38:20,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:20,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515719664] [2019-12-18 15:38:20,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798878079] [2019-12-18 15:38:20,967 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:21,008 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:38:21,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:21,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:21,009 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:21,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:21,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:21,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556078788] [2019-12-18 15:38:21,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:21,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:21,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:21,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:21,143 INFO L87 Difference]: Start difference. First operand 138 states and 329 transitions. Second operand 16 states. [2019-12-18 15:38:21,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:21,542 INFO L93 Difference]: Finished difference Result 194 states and 439 transitions. [2019-12-18 15:38:21,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:21,543 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:21,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:21,544 INFO L225 Difference]: With dead ends: 194 [2019-12-18 15:38:21,544 INFO L226 Difference]: Without dead ends: 193 [2019-12-18 15:38:21,545 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:38:21,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-18 15:38:21,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 139. [2019-12-18 15:38:21,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-18 15:38:21,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2019-12-18 15:38:21,548 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 13 [2019-12-18 15:38:21,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:21,549 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2019-12-18 15:38:21,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:21,549 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2019-12-18 15:38:21,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:21,549 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:21,549 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:21,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:21,752 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 59 times [2019-12-18 15:38:21,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:21,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681960145] [2019-12-18 15:38:21,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:21,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681960145] [2019-12-18 15:38:21,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364641525] [2019-12-18 15:38:21,824 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:21,867 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:38:21,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:21,869 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:21,869 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:22,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:22,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:22,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181368687] [2019-12-18 15:38:22,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:22,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:22,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:22,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:22,023 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand 16 states. [2019-12-18 15:38:22,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:22,788 INFO L93 Difference]: Finished difference Result 201 states and 456 transitions. [2019-12-18 15:38:22,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:22,788 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:22,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:22,790 INFO L225 Difference]: With dead ends: 201 [2019-12-18 15:38:22,790 INFO L226 Difference]: Without dead ends: 200 [2019-12-18 15:38:22,791 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:38:22,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-18 15:38:22,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 138. [2019-12-18 15:38:22,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:38:22,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 329 transitions. [2019-12-18 15:38:22,796 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 329 transitions. Word has length 13 [2019-12-18 15:38:22,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:22,797 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 329 transitions. [2019-12-18 15:38:22,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:22,797 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 329 transitions. [2019-12-18 15:38:22,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:22,797 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:22,797 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:22,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:22,998 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:22,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:22,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 60 times [2019-12-18 15:38:22,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:22,999 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892025004] [2019-12-18 15:38:22,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:23,117 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892025004] [2019-12-18 15:38:23,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576845258] [2019-12-18 15:38:23,118 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:23,185 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:38:23,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:23,186 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:23,187 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:23,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:23,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:23,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971532225] [2019-12-18 15:38:23,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:23,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:23,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:23,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:23,466 INFO L87 Difference]: Start difference. First operand 138 states and 329 transitions. Second operand 16 states. [2019-12-18 15:38:23,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:23,977 INFO L93 Difference]: Finished difference Result 186 states and 420 transitions. [2019-12-18 15:38:23,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:38:23,978 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:23,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:23,979 INFO L225 Difference]: With dead ends: 186 [2019-12-18 15:38:23,980 INFO L226 Difference]: Without dead ends: 185 [2019-12-18 15:38:23,980 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:38:23,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-18 15:38:23,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 136. [2019-12-18 15:38:23,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-18 15:38:23,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 323 transitions. [2019-12-18 15:38:23,984 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 323 transitions. Word has length 13 [2019-12-18 15:38:23,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:23,984 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 323 transitions. [2019-12-18 15:38:23,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:23,984 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 323 transitions. [2019-12-18 15:38:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:23,985 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:23,985 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:24,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:24,186 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:24,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:24,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 61 times [2019-12-18 15:38:24,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:24,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875834854] [2019-12-18 15:38:24,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:24,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875834854] [2019-12-18 15:38:24,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384072373] [2019-12-18 15:38:24,255 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:24,294 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:24,295 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:24,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:24,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:24,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009585951] [2019-12-18 15:38:24,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:24,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:24,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:24,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:24,385 INFO L87 Difference]: Start difference. First operand 136 states and 323 transitions. Second operand 16 states. [2019-12-18 15:38:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:24,550 INFO L93 Difference]: Finished difference Result 162 states and 365 transitions. [2019-12-18 15:38:24,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 15:38:24,550 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:24,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:24,551 INFO L225 Difference]: With dead ends: 162 [2019-12-18 15:38:24,551 INFO L226 Difference]: Without dead ends: 161 [2019-12-18 15:38:24,552 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2019-12-18 15:38:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-18 15:38:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 141. [2019-12-18 15:38:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 15:38:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-18 15:38:24,556 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-18 15:38:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:24,556 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-18 15:38:24,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-18 15:38:24,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:24,557 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:24,557 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:24,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:24,760 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:24,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:24,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118190, now seen corresponding path program 62 times [2019-12-18 15:38:24,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:24,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101642287] [2019-12-18 15:38:24,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:24,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101642287] [2019-12-18 15:38:24,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828354505] [2019-12-18 15:38:24,835 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:24,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:38:24,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:24,885 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:24,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:24,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:24,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:24,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962445914] [2019-12-18 15:38:24,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:24,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:24,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:24,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:24,996 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 16 states. [2019-12-18 15:38:25,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:25,262 INFO L93 Difference]: Finished difference Result 183 states and 412 transitions. [2019-12-18 15:38:25,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:38:25,263 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:25,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:25,264 INFO L225 Difference]: With dead ends: 183 [2019-12-18 15:38:25,264 INFO L226 Difference]: Without dead ends: 182 [2019-12-18 15:38:25,265 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:38:25,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-18 15:38:25,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 140. [2019-12-18 15:38:25,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 15:38:25,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 336 transitions. [2019-12-18 15:38:25,268 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 336 transitions. Word has length 13 [2019-12-18 15:38:25,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:25,268 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 336 transitions. [2019-12-18 15:38:25,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:25,269 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 336 transitions. [2019-12-18 15:38:25,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:25,269 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:25,269 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:25,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:25,470 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:25,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:25,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122840, now seen corresponding path program 63 times [2019-12-18 15:38:25,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:25,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511472841] [2019-12-18 15:38:25,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:25,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511472841] [2019-12-18 15:38:25,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015167416] [2019-12-18 15:38:25,540 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:25,584 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:38:25,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:25,584 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:25,585 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:25,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:25,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:25,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062991933] [2019-12-18 15:38:25,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:25,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:25,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:25,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:25,682 INFO L87 Difference]: Start difference. First operand 140 states and 336 transitions. Second operand 16 states. [2019-12-18 15:38:26,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:26,024 INFO L93 Difference]: Finished difference Result 208 states and 461 transitions. [2019-12-18 15:38:26,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:26,025 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:26,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:26,027 INFO L225 Difference]: With dead ends: 208 [2019-12-18 15:38:26,027 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 15:38:26,027 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:38:26,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 15:38:26,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 141. [2019-12-18 15:38:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 15:38:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-18 15:38:26,031 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-18 15:38:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:26,032 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-18 15:38:26,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-18 15:38:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:26,032 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:26,032 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:26,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:26,235 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:26,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122995, now seen corresponding path program 64 times [2019-12-18 15:38:26,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:26,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379305663] [2019-12-18 15:38:26,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:26,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379305663] [2019-12-18 15:38:26,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966039893] [2019-12-18 15:38:26,311 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:26,354 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:38:26,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:26,355 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:26,355 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:26,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:26,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:26,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786104816] [2019-12-18 15:38:26,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:26,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:26,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:26,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:26,449 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 16 states. [2019-12-18 15:38:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:26,784 INFO L93 Difference]: Finished difference Result 192 states and 432 transitions. [2019-12-18 15:38:26,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:26,784 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:26,786 INFO L225 Difference]: With dead ends: 192 [2019-12-18 15:38:26,786 INFO L226 Difference]: Without dead ends: 191 [2019-12-18 15:38:26,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2019-12-18 15:38:26,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-18 15:38:26,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 139. [2019-12-18 15:38:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-18 15:38:26,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 332 transitions. [2019-12-18 15:38:26,790 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 332 transitions. Word has length 13 [2019-12-18 15:38:26,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:26,790 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 332 transitions. [2019-12-18 15:38:26,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 332 transitions. [2019-12-18 15:38:26,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:26,791 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:26,791 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:26,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:26,994 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:26,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:26,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 65 times [2019-12-18 15:38:26,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:26,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839609161] [2019-12-18 15:38:26,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:27,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839609161] [2019-12-18 15:38:27,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111535089] [2019-12-18 15:38:27,080 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:27,126 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:38:27,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:27,127 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:27,128 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:27,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:27,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:27,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906094200] [2019-12-18 15:38:27,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:27,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:27,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:27,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:27,243 INFO L87 Difference]: Start difference. First operand 139 states and 332 transitions. Second operand 16 states. [2019-12-18 15:38:27,935 WARN L192 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:38:28,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:28,457 INFO L93 Difference]: Finished difference Result 208 states and 458 transitions. [2019-12-18 15:38:28,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:28,457 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:28,459 INFO L225 Difference]: With dead ends: 208 [2019-12-18 15:38:28,459 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 15:38:28,459 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2019-12-18 15:38:28,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 15:38:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 141. [2019-12-18 15:38:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 15:38:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-18 15:38:28,463 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-18 15:38:28,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:28,464 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-18 15:38:28,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:28,464 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-18 15:38:28,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:28,464 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:28,464 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:28,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:28,665 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:28,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 66 times [2019-12-18 15:38:28,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:28,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603816632] [2019-12-18 15:38:28,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:28,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603816632] [2019-12-18 15:38:28,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725921719] [2019-12-18 15:38:28,743 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:28,801 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:38:28,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:28,802 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:28,803 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:29,049 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-18 15:38:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:29,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:29,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:29,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006366559] [2019-12-18 15:38:29,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:29,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:29,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:29,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:29,091 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 16 states. [2019-12-18 15:38:30,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:30,844 INFO L93 Difference]: Finished difference Result 224 states and 504 transitions. [2019-12-18 15:38:30,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:38:30,845 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:30,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:30,846 INFO L225 Difference]: With dead ends: 224 [2019-12-18 15:38:30,847 INFO L226 Difference]: Without dead ends: 222 [2019-12-18 15:38:30,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=244, Invalid=457, Unknown=1, NotChecked=0, Total=702 [2019-12-18 15:38:30,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-18 15:38:30,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 143. [2019-12-18 15:38:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 15:38:30,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 348 transitions. [2019-12-18 15:38:30,850 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 348 transitions. Word has length 13 [2019-12-18 15:38:30,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:30,851 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 348 transitions. [2019-12-18 15:38:30,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 348 transitions. [2019-12-18 15:38:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:30,851 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:30,852 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:31,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:31,055 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:31,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:31,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 67 times [2019-12-18 15:38:31,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:31,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098957810] [2019-12-18 15:38:31,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:31,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098957810] [2019-12-18 15:38:31,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956965922] [2019-12-18 15:38:31,137 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:31,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:31,179 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:31,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:31,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:31,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100446940] [2019-12-18 15:38:31,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:31,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:31,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:31,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:31,294 INFO L87 Difference]: Start difference. First operand 143 states and 348 transitions. Second operand 16 states. [2019-12-18 15:38:31,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:31,754 INFO L93 Difference]: Finished difference Result 221 states and 494 transitions. [2019-12-18 15:38:31,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:31,755 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:31,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:31,756 INFO L225 Difference]: With dead ends: 221 [2019-12-18 15:38:31,757 INFO L226 Difference]: Without dead ends: 219 [2019-12-18 15:38:31,757 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=534, Unknown=0, NotChecked=0, Total=812 [2019-12-18 15:38:31,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-18 15:38:31,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 142. [2019-12-18 15:38:31,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 15:38:31,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 344 transitions. [2019-12-18 15:38:31,761 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 344 transitions. Word has length 13 [2019-12-18 15:38:31,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:31,761 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 344 transitions. [2019-12-18 15:38:31,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:31,761 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 344 transitions. [2019-12-18 15:38:31,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:31,761 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:31,762 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:31,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:31,962 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:31,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 68 times [2019-12-18 15:38:31,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:31,963 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973225940] [2019-12-18 15:38:31,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:32,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973225940] [2019-12-18 15:38:32,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086831855] [2019-12-18 15:38:32,028 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:32,068 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:38:32,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:32,069 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:32,069 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:32,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:32,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:32,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163673567] [2019-12-18 15:38:32,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:32,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:32,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:32,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:32,164 INFO L87 Difference]: Start difference. First operand 142 states and 344 transitions. Second operand 16 states. [2019-12-18 15:38:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:32,452 INFO L93 Difference]: Finished difference Result 199 states and 449 transitions. [2019-12-18 15:38:32,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:38:32,452 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:32,454 INFO L225 Difference]: With dead ends: 199 [2019-12-18 15:38:32,454 INFO L226 Difference]: Without dead ends: 198 [2019-12-18 15:38:32,455 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2019-12-18 15:38:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-18 15:38:32,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 144. [2019-12-18 15:38:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:38:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 352 transitions. [2019-12-18 15:38:32,459 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 352 transitions. Word has length 13 [2019-12-18 15:38:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:32,460 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 352 transitions. [2019-12-18 15:38:32,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:32,460 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 352 transitions. [2019-12-18 15:38:32,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:32,461 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:32,461 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:32,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:32,664 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:32,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:32,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 69 times [2019-12-18 15:38:32,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:32,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311795269] [2019-12-18 15:38:32,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:32,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311795269] [2019-12-18 15:38:32,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107749966] [2019-12-18 15:38:32,732 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:32,773 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:38:32,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:32,774 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:32,775 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:32,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:32,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:32,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855330579] [2019-12-18 15:38:32,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:32,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:32,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:32,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:32,868 INFO L87 Difference]: Start difference. First operand 144 states and 352 transitions. Second operand 16 states. [2019-12-18 15:38:33,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:33,174 INFO L93 Difference]: Finished difference Result 211 states and 484 transitions. [2019-12-18 15:38:33,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:38:33,174 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:33,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:33,176 INFO L225 Difference]: With dead ends: 211 [2019-12-18 15:38:33,176 INFO L226 Difference]: Without dead ends: 210 [2019-12-18 15:38:33,176 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2019-12-18 15:38:33,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-18 15:38:33,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 143. [2019-12-18 15:38:33,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 15:38:33,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 348 transitions. [2019-12-18 15:38:33,180 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 348 transitions. Word has length 13 [2019-12-18 15:38:33,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:33,180 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 348 transitions. [2019-12-18 15:38:33,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:33,180 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 348 transitions. [2019-12-18 15:38:33,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:33,180 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:33,181 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:33,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:33,381 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:33,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:33,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 70 times [2019-12-18 15:38:33,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:33,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570304062] [2019-12-18 15:38:33,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:33,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570304062] [2019-12-18 15:38:33,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756256249] [2019-12-18 15:38:33,468 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:33,510 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:38:33,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:33,511 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:33,511 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:33,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:33,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:33,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175846844] [2019-12-18 15:38:33,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:33,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:33,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:33,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:33,600 INFO L87 Difference]: Start difference. First operand 143 states and 348 transitions. Second operand 16 states. [2019-12-18 15:38:33,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:33,892 INFO L93 Difference]: Finished difference Result 219 states and 500 transitions. [2019-12-18 15:38:33,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:38:33,893 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:33,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:33,895 INFO L225 Difference]: With dead ends: 219 [2019-12-18 15:38:33,895 INFO L226 Difference]: Without dead ends: 218 [2019-12-18 15:38:33,895 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2019-12-18 15:38:33,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-18 15:38:33,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 144. [2019-12-18 15:38:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:38:33,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 352 transitions. [2019-12-18 15:38:33,899 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 352 transitions. Word has length 13 [2019-12-18 15:38:33,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:33,900 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 352 transitions. [2019-12-18 15:38:33,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:33,900 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 352 transitions. [2019-12-18 15:38:33,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:33,900 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:33,900 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:34,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:34,104 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:34,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:34,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 71 times [2019-12-18 15:38:34,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:34,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841489327] [2019-12-18 15:38:34,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:34,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841489327] [2019-12-18 15:38:34,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653951417] [2019-12-18 15:38:34,172 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:34,214 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:38:34,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:34,215 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:34,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:34,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:34,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:34,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982532128] [2019-12-18 15:38:34,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:34,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:34,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:34,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:34,305 INFO L87 Difference]: Start difference. First operand 144 states and 352 transitions. Second operand 16 states. [2019-12-18 15:38:34,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:34,605 INFO L93 Difference]: Finished difference Result 210 states and 476 transitions. [2019-12-18 15:38:34,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:34,605 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:34,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:34,607 INFO L225 Difference]: With dead ends: 210 [2019-12-18 15:38:34,607 INFO L226 Difference]: Without dead ends: 203 [2019-12-18 15:38:34,608 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2019-12-18 15:38:34,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-18 15:38:34,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 141. [2019-12-18 15:38:34,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 15:38:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 337 transitions. [2019-12-18 15:38:34,611 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 337 transitions. Word has length 13 [2019-12-18 15:38:34,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:34,611 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 337 transitions. [2019-12-18 15:38:34,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 337 transitions. [2019-12-18 15:38:34,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:34,612 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:34,612 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:34,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:34,813 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:34,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:34,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 72 times [2019-12-18 15:38:34,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:34,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502537074] [2019-12-18 15:38:34,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:34,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502537074] [2019-12-18 15:38:34,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170597870] [2019-12-18 15:38:34,915 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:34,968 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 15:38:34,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:34,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:34,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:35,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:35,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:35,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341112719] [2019-12-18 15:38:35,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:35,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:35,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:35,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:35,082 INFO L87 Difference]: Start difference. First operand 141 states and 337 transitions. Second operand 16 states. [2019-12-18 15:38:35,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:35,458 INFO L93 Difference]: Finished difference Result 206 states and 464 transitions. [2019-12-18 15:38:35,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:35,458 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:35,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:35,460 INFO L225 Difference]: With dead ends: 206 [2019-12-18 15:38:35,460 INFO L226 Difference]: Without dead ends: 205 [2019-12-18 15:38:35,461 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2019-12-18 15:38:35,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-18 15:38:35,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 138. [2019-12-18 15:38:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:38:35,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-18 15:38:35,464 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-18 15:38:35,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:35,465 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-18 15:38:35,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-18 15:38:35,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:35,468 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:35,468 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:35,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:35,669 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:35,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:35,670 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 73 times [2019-12-18 15:38:35,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:35,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227094224] [2019-12-18 15:38:35,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:35,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227094224] [2019-12-18 15:38:35,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204673819] [2019-12-18 15:38:35,735 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:35,777 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:35,777 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:35,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:35,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:35,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358677351] [2019-12-18 15:38:35,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:35,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:35,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:35,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:35,861 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-18 15:38:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:36,178 INFO L93 Difference]: Finished difference Result 173 states and 386 transitions. [2019-12-18 15:38:36,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:38:36,179 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:36,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:36,180 INFO L225 Difference]: With dead ends: 173 [2019-12-18 15:38:36,181 INFO L226 Difference]: Without dead ends: 172 [2019-12-18 15:38:36,181 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2019-12-18 15:38:36,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-18 15:38:36,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 138. [2019-12-18 15:38:36,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:38:36,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-18 15:38:36,184 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-18 15:38:36,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:36,185 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-18 15:38:36,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:36,185 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-18 15:38:36,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:36,185 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:36,186 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:36,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:36,386 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:36,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:36,387 INFO L82 PathProgramCache]: Analyzing trace with hash -573265077, now seen corresponding path program 74 times [2019-12-18 15:38:36,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:36,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224238301] [2019-12-18 15:38:36,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:36,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224238301] [2019-12-18 15:38:36,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505857332] [2019-12-18 15:38:36,464 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:36,506 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:38:36,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:36,507 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:36,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:36,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:36,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:36,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116164903] [2019-12-18 15:38:36,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:36,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:36,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:36,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:36,599 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-18 15:38:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:37,060 INFO L93 Difference]: Finished difference Result 189 states and 417 transitions. [2019-12-18 15:38:37,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:37,061 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:37,063 INFO L225 Difference]: With dead ends: 189 [2019-12-18 15:38:37,063 INFO L226 Difference]: Without dead ends: 188 [2019-12-18 15:38:37,063 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-12-18 15:38:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-18 15:38:37,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 139. [2019-12-18 15:38:37,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-18 15:38:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 331 transitions. [2019-12-18 15:38:37,066 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 331 transitions. Word has length 13 [2019-12-18 15:38:37,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:37,067 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 331 transitions. [2019-12-18 15:38:37,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:37,067 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 331 transitions. [2019-12-18 15:38:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:37,067 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:37,067 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:37,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:37,268 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:37,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:37,268 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 75 times [2019-12-18 15:38:37,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:37,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806186188] [2019-12-18 15:38:37,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:37,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806186188] [2019-12-18 15:38:37,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78177236] [2019-12-18 15:38:37,367 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:37,423 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:38:37,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:37,425 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:37,426 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:37,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:37,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:37,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601003144] [2019-12-18 15:38:37,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:37,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:37,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:37,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:37,573 INFO L87 Difference]: Start difference. First operand 139 states and 331 transitions. Second operand 16 states. [2019-12-18 15:38:37,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:37,883 INFO L93 Difference]: Finished difference Result 182 states and 406 transitions. [2019-12-18 15:38:37,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:38:37,884 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:37,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:37,885 INFO L225 Difference]: With dead ends: 182 [2019-12-18 15:38:37,885 INFO L226 Difference]: Without dead ends: 181 [2019-12-18 15:38:37,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2019-12-18 15:38:37,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-18 15:38:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 138. [2019-12-18 15:38:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:38:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-18 15:38:37,889 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-18 15:38:37,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:37,889 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-18 15:38:37,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:37,889 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-18 15:38:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:37,890 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:37,890 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:38,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:38,091 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:38,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:38,091 INFO L82 PathProgramCache]: Analyzing trace with hash -573409227, now seen corresponding path program 76 times [2019-12-18 15:38:38,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:38,092 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022887638] [2019-12-18 15:38:38,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:38,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022887638] [2019-12-18 15:38:38,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342252798] [2019-12-18 15:38:38,177 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:38,221 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:38:38,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:38,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:38,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:38,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:38,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:38,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128723182] [2019-12-18 15:38:38,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:38,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:38,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:38,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:38,564 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-18 15:38:39,115 WARN L192 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:38:40,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:40,042 INFO L93 Difference]: Finished difference Result 199 states and 439 transitions. [2019-12-18 15:38:40,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:40,043 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:40,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:40,044 INFO L225 Difference]: With dead ends: 199 [2019-12-18 15:38:40,045 INFO L226 Difference]: Without dead ends: 198 [2019-12-18 15:38:40,045 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2019-12-18 15:38:40,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-18 15:38:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 140. [2019-12-18 15:38:40,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 15:38:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-18 15:38:40,048 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-18 15:38:40,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:40,048 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-18 15:38:40,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:40,048 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-18 15:38:40,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:40,049 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:40,049 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:40,249 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:40,250 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:40,251 INFO L82 PathProgramCache]: Analyzing trace with hash -573409382, now seen corresponding path program 77 times [2019-12-18 15:38:40,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:40,251 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914928258] [2019-12-18 15:38:40,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:40,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914928258] [2019-12-18 15:38:40,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468580941] [2019-12-18 15:38:40,331 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:40,373 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:38:40,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:40,377 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:40,378 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:41,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:41,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:41,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877428665] [2019-12-18 15:38:41,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:41,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:41,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:41,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=170, Unknown=1, NotChecked=0, Total=240 [2019-12-18 15:38:41,923 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 16 states. [2019-12-18 15:38:42,558 WARN L192 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:38:42,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:42,879 INFO L93 Difference]: Finished difference Result 215 states and 476 transitions. [2019-12-18 15:38:42,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:42,879 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:42,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:42,881 INFO L225 Difference]: With dead ends: 215 [2019-12-18 15:38:42,881 INFO L226 Difference]: Without dead ends: 213 [2019-12-18 15:38:42,881 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=229, Invalid=472, Unknown=1, NotChecked=0, Total=702 [2019-12-18 15:38:42,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-18 15:38:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 140. [2019-12-18 15:38:42,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 15:38:42,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-18 15:38:42,885 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-18 15:38:42,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:42,886 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-18 15:38:42,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:42,886 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-18 15:38:42,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:42,886 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:42,886 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:43,089 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:43,089 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:43,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:43,090 INFO L82 PathProgramCache]: Analyzing trace with hash -573414032, now seen corresponding path program 78 times [2019-12-18 15:38:43,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:43,091 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896253860] [2019-12-18 15:38:43,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:43,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896253860] [2019-12-18 15:38:43,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440862269] [2019-12-18 15:38:43,160 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:43,205 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:38:43,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:43,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:43,207 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:43,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:43,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:43,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926126013] [2019-12-18 15:38:43,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:43,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:43,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:43,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:43,341 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 16 states. [2019-12-18 15:38:43,625 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2019-12-18 15:38:44,241 WARN L192 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-18 15:38:44,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:44,721 INFO L93 Difference]: Finished difference Result 201 states and 451 transitions. [2019-12-18 15:38:44,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:44,722 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:44,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:44,724 INFO L225 Difference]: With dead ends: 201 [2019-12-18 15:38:44,724 INFO L226 Difference]: Without dead ends: 200 [2019-12-18 15:38:44,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2019-12-18 15:38:44,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-18 15:38:44,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 138. [2019-12-18 15:38:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:38:44,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-18 15:38:44,728 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-18 15:38:44,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:44,728 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-18 15:38:44,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-18 15:38:44,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:44,729 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:44,729 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:44,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:44,932 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:44,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:44,932 INFO L82 PathProgramCache]: Analyzing trace with hash -577877877, now seen corresponding path program 79 times [2019-12-18 15:38:44,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:44,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635912260] [2019-12-18 15:38:44,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:45,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635912260] [2019-12-18 15:38:45,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153091410] [2019-12-18 15:38:45,008 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:45,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:45,048 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:45,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:45,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:45,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976894179] [2019-12-18 15:38:45,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:45,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:45,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:45,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:45,155 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 16 states. [2019-12-18 15:38:45,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:45,656 INFO L93 Difference]: Finished difference Result 187 states and 415 transitions. [2019-12-18 15:38:45,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:38:45,656 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:45,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:45,658 INFO L225 Difference]: With dead ends: 187 [2019-12-18 15:38:45,658 INFO L226 Difference]: Without dead ends: 186 [2019-12-18 15:38:45,658 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2019-12-18 15:38:45,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-18 15:38:45,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 141. [2019-12-18 15:38:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 15:38:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-18 15:38:45,661 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-18 15:38:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:45,662 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-18 15:38:45,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-18 15:38:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:45,662 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:45,662 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:45,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:45,863 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:45,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:45,864 INFO L82 PathProgramCache]: Analyzing trace with hash -577878032, now seen corresponding path program 80 times [2019-12-18 15:38:45,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:45,864 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443855252] [2019-12-18 15:38:45,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:45,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443855252] [2019-12-18 15:38:45,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807260031] [2019-12-18 15:38:45,960 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:46,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:38:46,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:46,023 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:46,024 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:48,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:48,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:48,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231107149] [2019-12-18 15:38:48,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:48,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:48,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:48,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:48,303 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 16 states. [2019-12-18 15:38:54,317 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-18 15:38:54,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:54,454 INFO L93 Difference]: Finished difference Result 207 states and 458 transitions. [2019-12-18 15:38:54,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:38:54,455 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:54,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:54,456 INFO L225 Difference]: With dead ends: 207 [2019-12-18 15:38:54,456 INFO L226 Difference]: Without dead ends: 206 [2019-12-18 15:38:54,457 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2019-12-18 15:38:54,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-18 15:38:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 140. [2019-12-18 15:38:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 15:38:54,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-18 15:38:54,460 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-18 15:38:54,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:54,461 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-18 15:38:54,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:54,461 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-18 15:38:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:54,461 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:54,461 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:54,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:54,662 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:54,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:54,663 INFO L82 PathProgramCache]: Analyzing trace with hash -577882682, now seen corresponding path program 81 times [2019-12-18 15:38:54,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:54,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118474958] [2019-12-18 15:38:54,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:54,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118474958] [2019-12-18 15:38:54,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481961469] [2019-12-18 15:38:54,737 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:54,777 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:38:54,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:54,778 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:54,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:54,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:54,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:54,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90860794] [2019-12-18 15:38:54,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:54,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:54,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:54,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:54,912 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 16 states. [2019-12-18 15:38:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:55,394 INFO L93 Difference]: Finished difference Result 229 states and 508 transitions. [2019-12-18 15:38:55,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:55,394 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:55,396 INFO L225 Difference]: With dead ends: 229 [2019-12-18 15:38:55,396 INFO L226 Difference]: Without dead ends: 227 [2019-12-18 15:38:55,396 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2019-12-18 15:38:55,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-18 15:38:55,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 143. [2019-12-18 15:38:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-18 15:38:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 347 transitions. [2019-12-18 15:38:55,400 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 347 transitions. Word has length 13 [2019-12-18 15:38:55,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:55,400 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 347 transitions. [2019-12-18 15:38:55,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:55,401 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 347 transitions. [2019-12-18 15:38:55,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:55,401 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:55,401 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:55,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:55,602 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:55,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:55,603 INFO L82 PathProgramCache]: Analyzing trace with hash -577882837, now seen corresponding path program 82 times [2019-12-18 15:38:55,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:55,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086867887] [2019-12-18 15:38:55,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:55,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086867887] [2019-12-18 15:38:55,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694187570] [2019-12-18 15:38:55,676 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:55,716 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:38:55,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:55,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:55,718 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:55,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:55,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:55,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138293917] [2019-12-18 15:38:55,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:55,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:55,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:55,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:55,864 INFO L87 Difference]: Start difference. First operand 143 states and 347 transitions. Second operand 16 states. [2019-12-18 15:38:56,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:56,413 INFO L93 Difference]: Finished difference Result 214 states and 479 transitions. [2019-12-18 15:38:56,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:38:56,413 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:56,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:56,415 INFO L225 Difference]: With dead ends: 214 [2019-12-18 15:38:56,415 INFO L226 Difference]: Without dead ends: 212 [2019-12-18 15:38:56,415 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2019-12-18 15:38:56,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-12-18 15:38:56,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 141. [2019-12-18 15:38:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-18 15:38:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-18 15:38:56,418 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-18 15:38:56,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:56,419 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-18 15:38:56,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:56,419 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-18 15:38:56,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:56,419 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:56,419 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:56,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:56,620 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:56,621 INFO L82 PathProgramCache]: Analyzing trace with hash -578026987, now seen corresponding path program 83 times [2019-12-18 15:38:56,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:56,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924147276] [2019-12-18 15:38:56,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:56,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924147276] [2019-12-18 15:38:56,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041165362] [2019-12-18 15:38:56,692 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:56,734 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:38:56,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:56,736 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:56,736 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:56,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:56,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:56,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817048706] [2019-12-18 15:38:56,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:56,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:56,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:56,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:56,873 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 16 states. [2019-12-18 15:38:57,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:57,799 INFO L93 Difference]: Finished difference Result 224 states and 495 transitions. [2019-12-18 15:38:57,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:38:57,800 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:57,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:57,801 INFO L225 Difference]: With dead ends: 224 [2019-12-18 15:38:57,801 INFO L226 Difference]: Without dead ends: 222 [2019-12-18 15:38:57,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-12-18 15:38:57,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-18 15:38:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 142. [2019-12-18 15:38:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 15:38:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-18 15:38:57,805 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-18 15:38:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:57,806 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-18 15:38:57,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-18 15:38:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:57,806 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:57,807 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:58,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:58,008 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:58,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:58,009 INFO L82 PathProgramCache]: Analyzing trace with hash -716406027, now seen corresponding path program 84 times [2019-12-18 15:38:58,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:58,010 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825654950] [2019-12-18 15:38:58,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:58,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825654950] [2019-12-18 15:38:58,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864544795] [2019-12-18 15:38:58,092 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:58,133 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:38:58,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:58,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:58,135 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:58,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:58,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:58,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324540430] [2019-12-18 15:38:58,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:58,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:58,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:58,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:58,212 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 16 states. [2019-12-18 15:38:58,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:58,558 INFO L93 Difference]: Finished difference Result 184 states and 421 transitions. [2019-12-18 15:38:58,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:38:58,558 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:58,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:58,559 INFO L225 Difference]: With dead ends: 184 [2019-12-18 15:38:58,560 INFO L226 Difference]: Without dead ends: 183 [2019-12-18 15:38:58,560 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:38:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-18 15:38:58,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 145. [2019-12-18 15:38:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 15:38:58,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-18 15:38:58,564 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-18 15:38:58,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:58,564 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-18 15:38:58,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:58,564 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-18 15:38:58,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:58,565 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:58,565 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:58,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:58,768 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:58,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:58,769 INFO L82 PathProgramCache]: Analyzing trace with hash -716406182, now seen corresponding path program 85 times [2019-12-18 15:38:58,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:58,769 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753960738] [2019-12-18 15:38:58,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:58,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753960738] [2019-12-18 15:38:58,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087182539] [2019-12-18 15:38:58,846 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:58,884 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:58,885 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:58,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:58,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:58,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078195319] [2019-12-18 15:38:58,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:58,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:58,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:58,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:58,977 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-18 15:38:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:38:59,447 INFO L93 Difference]: Finished difference Result 216 states and 492 transitions. [2019-12-18 15:38:59,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:38:59,448 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:38:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:38:59,449 INFO L225 Difference]: With dead ends: 216 [2019-12-18 15:38:59,450 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 15:38:59,450 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:38:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 15:38:59,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 144. [2019-12-18 15:38:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:38:59,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-18 15:38:59,454 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 13 [2019-12-18 15:38:59,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:38:59,455 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-18 15:38:59,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:38:59,455 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-18 15:38:59,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:38:59,455 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:38:59,455 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:38:59,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:59,659 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:38:59,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:38:59,660 INFO L82 PathProgramCache]: Analyzing trace with hash -716410832, now seen corresponding path program 86 times [2019-12-18 15:38:59,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:38:59,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503031946] [2019-12-18 15:38:59,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:38:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:38:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:59,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503031946] [2019-12-18 15:38:59,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953700955] [2019-12-18 15:38:59,734 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:38:59,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:38:59,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:38:59,804 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:38:59,805 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:38:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:38:59,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:38:59,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:38:59,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891311468] [2019-12-18 15:38:59,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:38:59,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:38:59,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:38:59,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:38:59,968 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-18 15:39:00,540 WARN L192 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2019-12-18 15:39:01,002 WARN L192 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-18 15:39:02,154 WARN L192 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 15:39:02,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:02,180 INFO L93 Difference]: Finished difference Result 222 states and 500 transitions. [2019-12-18 15:39:02,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:39:02,181 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:39:02,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:02,182 INFO L225 Difference]: With dead ends: 222 [2019-12-18 15:39:02,182 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 15:39:02,183 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2019-12-18 15:39:02,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 15:39:02,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 145. [2019-12-18 15:39:02,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 15:39:02,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-18 15:39:02,187 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-18 15:39:02,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:02,187 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-18 15:39:02,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:39:02,188 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-18 15:39:02,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:39:02,188 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:02,188 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:02,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:02,390 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:02,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:02,391 INFO L82 PathProgramCache]: Analyzing trace with hash -716410987, now seen corresponding path program 87 times [2019-12-18 15:39:02,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:02,391 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619061046] [2019-12-18 15:39:02,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:02,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619061046] [2019-12-18 15:39:02,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366588820] [2019-12-18 15:39:02,488 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:02,531 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 15:39:02,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:02,532 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:39:02,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:02,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:02,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:39:02,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941117502] [2019-12-18 15:39:02,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:39:02,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:02,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:39:02,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:02,641 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-18 15:39:03,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:03,082 INFO L93 Difference]: Finished difference Result 226 states and 511 transitions. [2019-12-18 15:39:03,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 15:39:03,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:39:03,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:03,084 INFO L225 Difference]: With dead ends: 226 [2019-12-18 15:39:03,084 INFO L226 Difference]: Without dead ends: 224 [2019-12-18 15:39:03,085 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:39:03,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-18 15:39:03,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 144. [2019-12-18 15:39:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:39:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-18 15:39:03,089 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 13 [2019-12-18 15:39:03,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:03,089 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-18 15:39:03,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:39:03,089 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-18 15:39:03,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:39:03,090 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:03,090 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:03,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:03,293 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:03,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:03,294 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 88 times [2019-12-18 15:39:03,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:03,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756715123] [2019-12-18 15:39:03,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:03,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756715123] [2019-12-18 15:39:03,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576891004] [2019-12-18 15:39:03,365 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:03,405 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:39:03,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:03,406 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:39:03,407 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:03,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:03,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:39:03,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934497911] [2019-12-18 15:39:03,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:39:03,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:03,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:39:03,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:03,483 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-18 15:39:03,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:03,846 INFO L93 Difference]: Finished difference Result 229 states and 515 transitions. [2019-12-18 15:39:03,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 15:39:03,847 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:39:03,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:03,849 INFO L225 Difference]: With dead ends: 229 [2019-12-18 15:39:03,849 INFO L226 Difference]: Without dead ends: 227 [2019-12-18 15:39:03,850 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2019-12-18 15:39:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-18 15:39:03,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 145. [2019-12-18 15:39:03,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 15:39:03,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-18 15:39:03,853 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-18 15:39:03,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:03,854 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-18 15:39:03,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:39:03,854 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-18 15:39:03,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:39:03,854 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:03,855 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:04,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:04,058 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:04,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:04,058 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 89 times [2019-12-18 15:39:04,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:04,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446845070] [2019-12-18 15:39:04,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:04,138 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446845070] [2019-12-18 15:39:04,138 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449588707] [2019-12-18 15:39:04,138 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:04,181 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:39:04,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:04,182 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:39:04,183 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:04,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:04,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:04,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:39:04,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066444907] [2019-12-18 15:39:04,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:39:04,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:04,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:39:04,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:04,271 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-18 15:39:04,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:04,561 INFO L93 Difference]: Finished difference Result 219 states and 501 transitions. [2019-12-18 15:39:04,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:39:04,561 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:39:04,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:04,563 INFO L225 Difference]: With dead ends: 219 [2019-12-18 15:39:04,563 INFO L226 Difference]: Without dead ends: 218 [2019-12-18 15:39:04,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2019-12-18 15:39:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-18 15:39:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 146. [2019-12-18 15:39:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-18 15:39:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 359 transitions. [2019-12-18 15:39:04,568 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 359 transitions. Word has length 13 [2019-12-18 15:39:04,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:04,568 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 359 transitions. [2019-12-18 15:39:04,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:39:04,568 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 359 transitions. [2019-12-18 15:39:04,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:39:04,569 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:04,569 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:04,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:04,770 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:04,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:04,771 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 90 times [2019-12-18 15:39:04,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:04,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070415047] [2019-12-18 15:39:04,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:04,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070415047] [2019-12-18 15:39:04,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400255285] [2019-12-18 15:39:04,840 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:04,880 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:39:04,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:04,881 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:39:04,882 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:05,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:05,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:39:05,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838441859] [2019-12-18 15:39:05,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:39:05,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:05,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:39:05,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:05,004 INFO L87 Difference]: Start difference. First operand 146 states and 359 transitions. Second operand 16 states. [2019-12-18 15:39:05,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:05,403 INFO L93 Difference]: Finished difference Result 222 states and 507 transitions. [2019-12-18 15:39:05,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 15:39:05,404 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:39:05,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:05,404 INFO L225 Difference]: With dead ends: 222 [2019-12-18 15:39:05,405 INFO L226 Difference]: Without dead ends: 220 [2019-12-18 15:39:05,405 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=583, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:39:05,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-18 15:39:05,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 145. [2019-12-18 15:39:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 15:39:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 355 transitions. [2019-12-18 15:39:05,408 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 355 transitions. Word has length 13 [2019-12-18 15:39:05,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:05,408 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 355 transitions. [2019-12-18 15:39:05,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:39:05,408 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 355 transitions. [2019-12-18 15:39:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:39:05,409 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:05,409 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:05,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:05,611 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:05,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:05,612 INFO L82 PathProgramCache]: Analyzing trace with hash -721023787, now seen corresponding path program 91 times [2019-12-18 15:39:05,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:05,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007465274] [2019-12-18 15:39:05,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:05,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007465274] [2019-12-18 15:39:05,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391079973] [2019-12-18 15:39:05,681 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:05,720 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:39:05,720 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:05,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:05,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:39:05,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199474712] [2019-12-18 15:39:05,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:39:05,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:05,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:39:05,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:05,829 INFO L87 Difference]: Start difference. First operand 145 states and 355 transitions. Second operand 16 states. [2019-12-18 15:39:06,194 WARN L192 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2019-12-18 15:39:06,730 WARN L192 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-18 15:39:07,337 WARN L192 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:39:07,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:07,367 INFO L93 Difference]: Finished difference Result 222 states and 501 transitions. [2019-12-18 15:39:07,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 15:39:07,367 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:39:07,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:07,368 INFO L225 Difference]: With dead ends: 222 [2019-12-18 15:39:07,369 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 15:39:07,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2019-12-18 15:39:07,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 15:39:07,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 144. [2019-12-18 15:39:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:39:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-18 15:39:07,372 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 13 [2019-12-18 15:39:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:07,373 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-18 15:39:07,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:39:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-18 15:39:07,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:39:07,373 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:07,373 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:07,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:07,574 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:07,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:07,574 INFO L82 PathProgramCache]: Analyzing trace with hash -721028437, now seen corresponding path program 92 times [2019-12-18 15:39:07,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:07,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87312351] [2019-12-18 15:39:07,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:07,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87312351] [2019-12-18 15:39:07,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899951021] [2019-12-18 15:39:07,668 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:07,709 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:39:07,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:07,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:39:07,711 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:07,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:07,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:39:07,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364702903] [2019-12-18 15:39:07,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:39:07,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:07,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:39:07,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:07,892 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-18 15:39:08,167 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:39:09,672 WARN L192 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2019-12-18 15:39:09,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:09,727 INFO L93 Difference]: Finished difference Result 220 states and 495 transitions. [2019-12-18 15:39:09,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 15:39:09,728 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:39:09,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:09,729 INFO L225 Difference]: With dead ends: 220 [2019-12-18 15:39:09,729 INFO L226 Difference]: Without dead ends: 219 [2019-12-18 15:39:09,730 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2019-12-18 15:39:09,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-18 15:39:09,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 142. [2019-12-18 15:39:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-18 15:39:09,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-18 15:39:09,733 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-18 15:39:09,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:09,733 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-18 15:39:09,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:39:09,734 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-18 15:39:09,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:39:09,734 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:09,734 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:09,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:09,937 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:09,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:09,938 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 93 times [2019-12-18 15:39:09,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:09,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022913301] [2019-12-18 15:39:09,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:10,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022913301] [2019-12-18 15:39:10,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670760347] [2019-12-18 15:39:10,001 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:10,041 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:39:10,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:10,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 15:39:10,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:10,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:10,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-18 15:39:10,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604874757] [2019-12-18 15:39:10,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 15:39:10,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:10,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 15:39:10,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:10,138 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 16 states. [2019-12-18 15:39:10,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:10,400 INFO L93 Difference]: Finished difference Result 163 states and 366 transitions. [2019-12-18 15:39:10,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:39:10,401 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-18 15:39:10,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:10,402 INFO L225 Difference]: With dead ends: 163 [2019-12-18 15:39:10,402 INFO L226 Difference]: Without dead ends: 153 [2019-12-18 15:39:10,402 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2019-12-18 15:39:10,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-18 15:39:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 138. [2019-12-18 15:39:10,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-18 15:39:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 323 transitions. [2019-12-18 15:39:10,406 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 323 transitions. Word has length 13 [2019-12-18 15:39:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:10,406 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 323 transitions. [2019-12-18 15:39:10,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 15:39:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 323 transitions. [2019-12-18 15:39:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 15:39:10,407 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:10,407 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:10,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:10,610 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:10,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:10,611 INFO L82 PathProgramCache]: Analyzing trace with hash -831836784, now seen corresponding path program 7 times [2019-12-18 15:39:10,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:10,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184516278] [2019-12-18 15:39:10,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:10,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184516278] [2019-12-18 15:39:10,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967758240] [2019-12-18 15:39:10,692 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:10,731 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 15:39:10,732 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:10,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 15:39:10,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2019-12-18 15:39:10,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829201971] [2019-12-18 15:39:10,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 15:39:10,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:10,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 15:39:10,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:10,785 INFO L87 Difference]: Start difference. First operand 138 states and 323 transitions. Second operand 8 states. [2019-12-18 15:39:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:10,804 INFO L93 Difference]: Finished difference Result 151 states and 325 transitions. [2019-12-18 15:39:10,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 15:39:10,805 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-18 15:39:10,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:10,806 INFO L225 Difference]: With dead ends: 151 [2019-12-18 15:39:10,806 INFO L226 Difference]: Without dead ends: 137 [2019-12-18 15:39:10,807 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-18 15:39:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-12-18 15:39:10,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2019-12-18 15:39:10,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 15:39:10,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2019-12-18 15:39:10,810 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 13 [2019-12-18 15:39:10,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:10,810 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2019-12-18 15:39:10,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 15:39:10,810 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2019-12-18 15:39:10,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:10,811 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:10,811 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:11,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:11,011 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:11,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:11,012 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 94 times [2019-12-18 15:39:11,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:11,013 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695155754] [2019-12-18 15:39:11,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:11,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695155754] [2019-12-18 15:39:11,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64468263] [2019-12-18 15:39:11,100 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:11,144 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:39:11,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:11,145 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:11,145 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:11,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:11,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:11,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110606869] [2019-12-18 15:39:11,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:11,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:11,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:11,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:11,279 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand 18 states. [2019-12-18 15:39:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:11,470 INFO L93 Difference]: Finished difference Result 161 states and 344 transitions. [2019-12-18 15:39:11,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:39:11,470 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:11,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:11,471 INFO L225 Difference]: With dead ends: 161 [2019-12-18 15:39:11,471 INFO L226 Difference]: Without dead ends: 159 [2019-12-18 15:39:11,472 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:39:11,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-18 15:39:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 137. [2019-12-18 15:39:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-18 15:39:11,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 301 transitions. [2019-12-18 15:39:11,475 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 301 transitions. Word has length 14 [2019-12-18 15:39:11,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:11,475 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 301 transitions. [2019-12-18 15:39:11,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 301 transitions. [2019-12-18 15:39:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:11,475 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:11,475 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:11,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:11,676 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:11,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:11,677 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 95 times [2019-12-18 15:39:11,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:11,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497528659] [2019-12-18 15:39:11,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:11,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497528659] [2019-12-18 15:39:11,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464197841] [2019-12-18 15:39:11,759 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:11,801 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:39:11,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:11,802 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:11,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:11,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:11,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:11,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108053541] [2019-12-18 15:39:11,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:11,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:11,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:11,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:11,902 INFO L87 Difference]: Start difference. First operand 137 states and 301 transitions. Second operand 18 states. [2019-12-18 15:39:12,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:12,100 INFO L93 Difference]: Finished difference Result 169 states and 363 transitions. [2019-12-18 15:39:12,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:39:12,101 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:12,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:12,101 INFO L225 Difference]: With dead ends: 169 [2019-12-18 15:39:12,102 INFO L226 Difference]: Without dead ends: 168 [2019-12-18 15:39:12,102 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:39:12,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-12-18 15:39:12,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2019-12-18 15:39:12,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 15:39:12,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 312 transitions. [2019-12-18 15:39:12,105 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 312 transitions. Word has length 14 [2019-12-18 15:39:12,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:12,106 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 312 transitions. [2019-12-18 15:39:12,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 312 transitions. [2019-12-18 15:39:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:12,106 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:12,106 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:12,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:12,307 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:12,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:12,307 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 96 times [2019-12-18 15:39:12,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:12,308 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371612094] [2019-12-18 15:39:12,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:12,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371612094] [2019-12-18 15:39:12,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384844169] [2019-12-18 15:39:12,383 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:12,422 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:39:12,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:12,422 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:12,423 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:12,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:12,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:12,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450222100] [2019-12-18 15:39:12,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:12,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:12,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:12,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:12,639 INFO L87 Difference]: Start difference. First operand 140 states and 312 transitions. Second operand 18 states. [2019-12-18 15:39:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:12,936 INFO L93 Difference]: Finished difference Result 180 states and 385 transitions. [2019-12-18 15:39:12,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 15:39:12,937 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:12,938 INFO L225 Difference]: With dead ends: 180 [2019-12-18 15:39:12,938 INFO L226 Difference]: Without dead ends: 177 [2019-12-18 15:39:12,938 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2019-12-18 15:39:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-18 15:39:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 140. [2019-12-18 15:39:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 15:39:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-18 15:39:12,941 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-18 15:39:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:12,941 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-18 15:39:12,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-18 15:39:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:12,942 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:12,942 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:13,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:13,142 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:13,143 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 97 times [2019-12-18 15:39:13,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:13,143 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032370198] [2019-12-18 15:39:13,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:13,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032370198] [2019-12-18 15:39:13,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524372564] [2019-12-18 15:39:13,256 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:13,296 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:13,297 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:15,277 WARN L192 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-18 15:39:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:15,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:15,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:15,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761489320] [2019-12-18 15:39:15,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:15,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:15,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:15,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=202, Unknown=3, NotChecked=0, Total=306 [2019-12-18 15:39:15,295 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-18 15:39:15,730 WARN L192 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-18 15:39:15,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:15,953 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2019-12-18 15:39:15,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 15:39:15,953 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:15,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:15,954 INFO L225 Difference]: With dead ends: 188 [2019-12-18 15:39:15,954 INFO L226 Difference]: Without dead ends: 186 [2019-12-18 15:39:15,954 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=220, Invalid=427, Unknown=3, NotChecked=0, Total=650 [2019-12-18 15:39:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-18 15:39:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 140. [2019-12-18 15:39:15,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-18 15:39:15,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-18 15:39:15,958 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-18 15:39:15,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:15,958 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-18 15:39:15,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:15,958 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-18 15:39:15,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:15,958 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:15,958 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:16,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:16,159 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:16,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:16,159 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 98 times [2019-12-18 15:39:16,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:16,165 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649805715] [2019-12-18 15:39:16,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:16,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649805715] [2019-12-18 15:39:16,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883971160] [2019-12-18 15:39:16,240 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:16,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:39:16,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:16,283 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:16,283 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:16,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:16,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:16,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508051116] [2019-12-18 15:39:16,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:16,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:16,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:16,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:16,389 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-18 15:39:16,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:16,594 INFO L93 Difference]: Finished difference Result 172 states and 373 transitions. [2019-12-18 15:39:16,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:39:16,595 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:16,595 INFO L225 Difference]: With dead ends: 172 [2019-12-18 15:39:16,596 INFO L226 Difference]: Without dead ends: 171 [2019-12-18 15:39:16,596 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:39:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-18 15:39:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 144. [2019-12-18 15:39:16,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:39:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 326 transitions. [2019-12-18 15:39:16,599 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 326 transitions. Word has length 14 [2019-12-18 15:39:16,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:16,599 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 326 transitions. [2019-12-18 15:39:16,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:16,599 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 326 transitions. [2019-12-18 15:39:16,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:16,600 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:16,600 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:16,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:16,800 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:16,801 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 99 times [2019-12-18 15:39:16,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:16,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152375248] [2019-12-18 15:39:16,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:16,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152375248] [2019-12-18 15:39:16,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689951069] [2019-12-18 15:39:16,880 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:16,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:39:16,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:16,924 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:16,924 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:17,427 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_305 Int)) (and (<= c_~i~0 (+ (* 3 v_~j~0_305) 1)) (<= (div (+ (* v_~j~0_305 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ v_~j~0_305 c_~i~0)))) is different from true [2019-12-18 15:39:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:17,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:17,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:17,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015242638] [2019-12-18 15:39:17,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:17,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:17,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:17,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=185, Unknown=1, NotChecked=30, Total=306 [2019-12-18 15:39:17,429 INFO L87 Difference]: Start difference. First operand 144 states and 326 transitions. Second operand 18 states. [2019-12-18 15:39:18,473 WARN L192 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2019-12-18 15:39:19,066 WARN L192 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2019-12-18 15:39:19,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:19,196 INFO L93 Difference]: Finished difference Result 209 states and 443 transitions. [2019-12-18 15:39:19,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:39:19,197 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:19,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:19,198 INFO L225 Difference]: With dead ends: 209 [2019-12-18 15:39:19,198 INFO L226 Difference]: Without dead ends: 208 [2019-12-18 15:39:19,198 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=295, Invalid=520, Unknown=1, NotChecked=54, Total=870 [2019-12-18 15:39:19,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-12-18 15:39:19,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 144. [2019-12-18 15:39:19,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:39:19,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 326 transitions. [2019-12-18 15:39:19,202 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 326 transitions. Word has length 14 [2019-12-18 15:39:19,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:19,202 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 326 transitions. [2019-12-18 15:39:19,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:19,202 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 326 transitions. [2019-12-18 15:39:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:19,202 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:19,202 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:19,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:19,403 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:19,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:19,404 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 100 times [2019-12-18 15:39:19,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:19,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281314966] [2019-12-18 15:39:19,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:19,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281314966] [2019-12-18 15:39:19,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169828312] [2019-12-18 15:39:19,492 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:19,533 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:39:19,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:19,534 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:19,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:20,373 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_309 Int)) (and (<= c_~j~0 (+ (* 3 v_~j~0_309) 1)) (<= c_~i~0 (+ (* 2 v_~j~0_309) c_~j~0 1)) (<= (div (+ (* v_~j~0_309 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-18 15:39:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:20,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:20,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:20,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544532786] [2019-12-18 15:39:20,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:20,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:20,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:20,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=178, Unknown=1, NotChecked=30, Total=306 [2019-12-18 15:39:20,375 INFO L87 Difference]: Start difference. First operand 144 states and 326 transitions. Second operand 18 states. [2019-12-18 15:39:21,007 WARN L192 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-18 15:39:21,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:21,054 INFO L93 Difference]: Finished difference Result 216 states and 457 transitions. [2019-12-18 15:39:21,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:39:21,061 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:21,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:21,062 INFO L225 Difference]: With dead ends: 216 [2019-12-18 15:39:21,062 INFO L226 Difference]: Without dead ends: 215 [2019-12-18 15:39:21,062 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=259, Invalid=446, Unknown=1, NotChecked=50, Total=756 [2019-12-18 15:39:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-18 15:39:21,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2019-12-18 15:39:21,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 15:39:21,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 330 transitions. [2019-12-18 15:39:21,065 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 330 transitions. Word has length 14 [2019-12-18 15:39:21,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:21,065 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 330 transitions. [2019-12-18 15:39:21,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:21,065 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 330 transitions. [2019-12-18 15:39:21,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:21,066 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:21,066 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:21,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:21,269 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:21,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:21,270 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 101 times [2019-12-18 15:39:21,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:21,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690155154] [2019-12-18 15:39:21,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:21,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690155154] [2019-12-18 15:39:21,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972137252] [2019-12-18 15:39:21,344 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:21,386 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 15:39:21,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:21,387 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:21,388 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:22,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:22,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:22,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743835973] [2019-12-18 15:39:22,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:22,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:22,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:22,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:22,256 INFO L87 Difference]: Start difference. First operand 145 states and 330 transitions. Second operand 18 states. [2019-12-18 15:39:22,401 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2019-12-18 15:39:23,915 WARN L192 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-18 15:39:24,757 WARN L192 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-18 15:39:27,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:27,786 INFO L93 Difference]: Finished difference Result 197 states and 424 transitions. [2019-12-18 15:39:27,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:39:27,787 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:27,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:27,788 INFO L225 Difference]: With dead ends: 197 [2019-12-18 15:39:27,788 INFO L226 Difference]: Without dead ends: 193 [2019-12-18 15:39:27,788 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=321, Invalid=547, Unknown=2, NotChecked=0, Total=870 [2019-12-18 15:39:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-18 15:39:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 144. [2019-12-18 15:39:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:39:27,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 325 transitions. [2019-12-18 15:39:27,792 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 325 transitions. Word has length 14 [2019-12-18 15:39:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:27,792 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 325 transitions. [2019-12-18 15:39:27,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:27,792 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 325 transitions. [2019-12-18 15:39:27,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:27,792 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:27,792 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:27,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:27,993 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:27,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:27,994 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 102 times [2019-12-18 15:39:27,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:27,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707110361] [2019-12-18 15:39:27,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:28,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707110361] [2019-12-18 15:39:28,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997970844] [2019-12-18 15:39:28,074 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:28,117 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:39:28,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:28,118 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:28,119 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:29,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:29,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:29,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866599746] [2019-12-18 15:39:29,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:29,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:29,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:29,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=207, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:39:29,152 INFO L87 Difference]: Start difference. First operand 144 states and 325 transitions. Second operand 18 states. [2019-12-18 15:39:29,954 WARN L192 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2019-12-18 15:39:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:30,489 INFO L93 Difference]: Finished difference Result 205 states and 440 transitions. [2019-12-18 15:39:30,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:39:30,490 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:30,491 INFO L225 Difference]: With dead ends: 205 [2019-12-18 15:39:30,491 INFO L226 Difference]: Without dead ends: 204 [2019-12-18 15:39:30,491 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=263, Invalid=491, Unknown=2, NotChecked=0, Total=756 [2019-12-18 15:39:30,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-18 15:39:30,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 146. [2019-12-18 15:39:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-18 15:39:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 332 transitions. [2019-12-18 15:39:30,495 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 332 transitions. Word has length 14 [2019-12-18 15:39:30,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:30,495 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 332 transitions. [2019-12-18 15:39:30,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:30,495 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 332 transitions. [2019-12-18 15:39:30,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:30,495 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:30,496 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:30,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:30,696 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:30,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:30,697 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 103 times [2019-12-18 15:39:30,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:30,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202068130] [2019-12-18 15:39:30,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:30,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202068130] [2019-12-18 15:39:30,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120711409] [2019-12-18 15:39:30,784 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:30,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:30,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:31,778 WARN L192 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-18 15:39:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:32,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:32,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:32,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791861138] [2019-12-18 15:39:32,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:32,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:32,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:32,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=199, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:39:32,605 INFO L87 Difference]: Start difference. First operand 146 states and 332 transitions. Second operand 18 states. [2019-12-18 15:39:32,882 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2019-12-18 15:39:34,182 WARN L192 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2019-12-18 15:39:35,485 WARN L192 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-18 15:39:35,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:35,538 INFO L93 Difference]: Finished difference Result 228 states and 488 transitions. [2019-12-18 15:39:35,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 15:39:35,539 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:35,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:35,540 INFO L225 Difference]: With dead ends: 228 [2019-12-18 15:39:35,540 INFO L226 Difference]: Without dead ends: 225 [2019-12-18 15:39:35,540 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=277, Invalid=476, Unknown=3, NotChecked=0, Total=756 [2019-12-18 15:39:35,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-12-18 15:39:35,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 145. [2019-12-18 15:39:35,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-18 15:39:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 328 transitions. [2019-12-18 15:39:35,543 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 328 transitions. Word has length 14 [2019-12-18 15:39:35,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:35,544 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 328 transitions. [2019-12-18 15:39:35,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:35,544 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 328 transitions. [2019-12-18 15:39:35,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:35,544 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:35,544 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:35,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:35,745 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:35,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:35,745 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 104 times [2019-12-18 15:39:35,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:35,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538060267] [2019-12-18 15:39:35,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:35,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538060267] [2019-12-18 15:39:35,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121036545] [2019-12-18 15:39:35,824 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:35,871 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:39:35,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:35,872 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:35,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:36,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:36,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:36,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003631919] [2019-12-18 15:39:36,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:36,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:36,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:36,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:36,066 INFO L87 Difference]: Start difference. First operand 145 states and 328 transitions. Second operand 18 states. [2019-12-18 15:39:40,186 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 15:39:40,927 WARN L192 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-18 15:39:41,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:41,552 INFO L93 Difference]: Finished difference Result 192 states and 415 transitions. [2019-12-18 15:39:41,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 15:39:41,553 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:41,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:41,554 INFO L225 Difference]: With dead ends: 192 [2019-12-18 15:39:41,554 INFO L226 Difference]: Without dead ends: 190 [2019-12-18 15:39:41,554 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=249, Invalid=452, Unknown=1, NotChecked=0, Total=702 [2019-12-18 15:39:41,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-18 15:39:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 144. [2019-12-18 15:39:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-18 15:39:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 325 transitions. [2019-12-18 15:39:41,558 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 325 transitions. Word has length 14 [2019-12-18 15:39:41,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:41,558 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 325 transitions. [2019-12-18 15:39:41,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:41,558 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 325 transitions. [2019-12-18 15:39:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:41,559 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:41,559 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:41,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:41,762 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:41,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:41,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091347, now seen corresponding path program 105 times [2019-12-18 15:39:41,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:41,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123106122] [2019-12-18 15:39:41,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:41,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123106122] [2019-12-18 15:39:41,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21514299] [2019-12-18 15:39:41,848 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:41,891 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:39:41,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:41,892 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:41,892 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:41,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:41,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:41,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141137668] [2019-12-18 15:39:41,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:41,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:41,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:41,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:41,999 INFO L87 Difference]: Start difference. First operand 144 states and 325 transitions. Second operand 18 states. [2019-12-18 15:39:42,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:42,198 INFO L93 Difference]: Finished difference Result 170 states and 372 transitions. [2019-12-18 15:39:42,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 15:39:42,198 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:42,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:42,199 INFO L225 Difference]: With dead ends: 170 [2019-12-18 15:39:42,199 INFO L226 Difference]: Without dead ends: 162 [2019-12-18 15:39:42,200 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2019-12-18 15:39:42,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-18 15:39:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2019-12-18 15:39:42,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 15:39:42,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-18 15:39:42,203 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-18 15:39:42,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:42,203 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-18 15:39:42,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:42,204 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-18 15:39:42,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:42,204 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:42,204 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:42,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:42,405 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:42,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:42,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091192, now seen corresponding path program 106 times [2019-12-18 15:39:42,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:42,406 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571873277] [2019-12-18 15:39:42,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:42,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571873277] [2019-12-18 15:39:42,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162794593] [2019-12-18 15:39:42,488 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:42,530 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:39:42,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:42,531 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:42,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:42,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:42,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:42,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714019623] [2019-12-18 15:39:42,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:42,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:42,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:42,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:42,658 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-18 15:39:43,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:43,009 INFO L93 Difference]: Finished difference Result 197 states and 428 transitions. [2019-12-18 15:39:43,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:39:43,010 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:43,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:43,011 INFO L225 Difference]: With dead ends: 197 [2019-12-18 15:39:43,011 INFO L226 Difference]: Without dead ends: 196 [2019-12-18 15:39:43,011 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=498, Unknown=0, NotChecked=0, Total=756 [2019-12-18 15:39:43,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-18 15:39:43,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 149. [2019-12-18 15:39:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 15:39:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-18 15:39:43,014 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-18 15:39:43,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:43,014 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-18 15:39:43,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:43,015 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-18 15:39:43,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:43,015 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:43,015 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:43,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:43,216 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:43,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:43,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 107 times [2019-12-18 15:39:43,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:43,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266784810] [2019-12-18 15:39:43,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:43,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266784810] [2019-12-18 15:39:43,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307915649] [2019-12-18 15:39:43,295 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:43,350 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:39:43,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:43,351 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:43,352 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:43,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:43,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:43,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145480376] [2019-12-18 15:39:43,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:43,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:43,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:43,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:43,492 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-18 15:39:43,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:43,984 INFO L93 Difference]: Finished difference Result 232 states and 498 transitions. [2019-12-18 15:39:43,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:39:43,985 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:43,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:43,985 INFO L225 Difference]: With dead ends: 232 [2019-12-18 15:39:43,986 INFO L226 Difference]: Without dead ends: 231 [2019-12-18 15:39:43,986 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=540, Unknown=0, NotChecked=0, Total=812 [2019-12-18 15:39:43,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-18 15:39:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 150. [2019-12-18 15:39:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 15:39:43,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 340 transitions. [2019-12-18 15:39:43,990 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 340 transitions. Word has length 14 [2019-12-18 15:39:43,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:43,991 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 340 transitions. [2019-12-18 15:39:43,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:43,991 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 340 transitions. [2019-12-18 15:39:43,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:43,991 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:43,992 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:44,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:44,195 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:44,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:44,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 108 times [2019-12-18 15:39:44,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:44,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581898896] [2019-12-18 15:39:44,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:44,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581898896] [2019-12-18 15:39:44,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006646040] [2019-12-18 15:39:44,275 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:44,319 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 15:39:44,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:44,320 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:44,321 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:44,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:44,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:44,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082516882] [2019-12-18 15:39:44,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:44,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:44,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:44,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:44,484 INFO L87 Difference]: Start difference. First operand 150 states and 340 transitions. Second operand 18 states. [2019-12-18 15:39:45,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:45,001 INFO L93 Difference]: Finished difference Result 212 states and 456 transitions. [2019-12-18 15:39:45,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:39:45,002 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:45,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:45,002 INFO L225 Difference]: With dead ends: 212 [2019-12-18 15:39:45,003 INFO L226 Difference]: Without dead ends: 211 [2019-12-18 15:39:45,003 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:39:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-18 15:39:45,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 149. [2019-12-18 15:39:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 15:39:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-18 15:39:45,006 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-18 15:39:45,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:45,006 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-18 15:39:45,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:45,006 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-18 15:39:45,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:45,007 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:45,007 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:45,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:45,207 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:45,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:45,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 109 times [2019-12-18 15:39:45,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:45,208 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307803732] [2019-12-18 15:39:45,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:45,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307803732] [2019-12-18 15:39:45,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472473219] [2019-12-18 15:39:45,304 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:45,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:45,348 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:45,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:45,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:45,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269361482] [2019-12-18 15:39:45,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:45,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:45,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:45,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:45,534 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-18 15:39:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:46,062 INFO L93 Difference]: Finished difference Result 220 states and 470 transitions. [2019-12-18 15:39:46,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:39:46,063 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:46,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:46,064 INFO L225 Difference]: With dead ends: 220 [2019-12-18 15:39:46,064 INFO L226 Difference]: Without dead ends: 219 [2019-12-18 15:39:46,064 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:39:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-18 15:39:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 151. [2019-12-18 15:39:46,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-18 15:39:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 344 transitions. [2019-12-18 15:39:46,068 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 344 transitions. Word has length 14 [2019-12-18 15:39:46,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:46,068 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 344 transitions. [2019-12-18 15:39:46,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:46,068 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 344 transitions. [2019-12-18 15:39:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:46,069 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:46,069 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:46,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:46,269 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:46,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:46,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 110 times [2019-12-18 15:39:46,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:46,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264059048] [2019-12-18 15:39:46,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:46,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264059048] [2019-12-18 15:39:46,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044018797] [2019-12-18 15:39:46,392 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:46,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:39:46,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:46,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:46,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:46,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:46,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:46,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860170396] [2019-12-18 15:39:46,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:46,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:46,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:46,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:46,645 INFO L87 Difference]: Start difference. First operand 151 states and 344 transitions. Second operand 18 states. [2019-12-18 15:39:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:47,753 INFO L93 Difference]: Finished difference Result 252 states and 542 transitions. [2019-12-18 15:39:47,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 15:39:47,754 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:47,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:47,754 INFO L225 Difference]: With dead ends: 252 [2019-12-18 15:39:47,755 INFO L226 Difference]: Without dead ends: 245 [2019-12-18 15:39:47,755 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2019-12-18 15:39:47,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-12-18 15:39:47,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 153. [2019-12-18 15:39:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 15:39:47,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 347 transitions. [2019-12-18 15:39:47,759 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 347 transitions. Word has length 14 [2019-12-18 15:39:47,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:47,759 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 347 transitions. [2019-12-18 15:39:47,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:47,759 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 347 transitions. [2019-12-18 15:39:47,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:47,759 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:47,759 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:39:47,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:47,960 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:39:47,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:39:47,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 111 times [2019-12-18 15:39:47,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:39:47,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872810968] [2019-12-18 15:39:47,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:39:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:39:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:48,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872810968] [2019-12-18 15:39:48,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185513514] [2019-12-18 15:39:48,051 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:39:48,096 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 15:39:48,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:39:48,097 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:39:48,098 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:39:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:39:48,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:39:48,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:39:48,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213675748] [2019-12-18 15:39:48,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:39:48,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:39:48,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:39:48,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:39:48,275 INFO L87 Difference]: Start difference. First operand 153 states and 347 transitions. Second operand 18 states. [2019-12-18 15:39:50,492 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-18 15:39:50,749 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2019-12-18 15:39:52,876 WARN L192 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-18 15:39:59,684 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-18 15:39:59,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:39:59,884 INFO L93 Difference]: Finished difference Result 247 states and 530 transitions. [2019-12-18 15:39:59,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 15:39:59,885 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:39:59,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:39:59,886 INFO L225 Difference]: With dead ends: 247 [2019-12-18 15:39:59,886 INFO L226 Difference]: Without dead ends: 244 [2019-12-18 15:39:59,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=359, Invalid=697, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 15:39:59,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-12-18 15:39:59,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 152. [2019-12-18 15:39:59,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 15:39:59,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 344 transitions. [2019-12-18 15:39:59,889 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 344 transitions. Word has length 14 [2019-12-18 15:39:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:39:59,890 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 344 transitions. [2019-12-18 15:39:59,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:39:59,890 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 344 transitions. [2019-12-18 15:39:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:39:59,890 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:39:59,890 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:00,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:00,091 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:00,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:00,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 112 times [2019-12-18 15:40:00,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:00,092 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044282105] [2019-12-18 15:40:00,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:00,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044282105] [2019-12-18 15:40:00,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373783746] [2019-12-18 15:40:00,168 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:00,211 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:40:00,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:00,211 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:00,212 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:00,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:00,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:00,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419744730] [2019-12-18 15:40:00,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:00,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:00,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:00,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:00,374 INFO L87 Difference]: Start difference. First operand 152 states and 344 transitions. Second operand 18 states. [2019-12-18 15:40:01,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:01,001 INFO L93 Difference]: Finished difference Result 208 states and 450 transitions. [2019-12-18 15:40:01,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:40:01,002 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:01,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:01,002 INFO L225 Difference]: With dead ends: 208 [2019-12-18 15:40:01,003 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 15:40:01,003 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2019-12-18 15:40:01,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 15:40:01,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 154. [2019-12-18 15:40:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 15:40:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 352 transitions. [2019-12-18 15:40:01,006 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 352 transitions. Word has length 14 [2019-12-18 15:40:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:01,007 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 352 transitions. [2019-12-18 15:40:01,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 352 transitions. [2019-12-18 15:40:01,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:01,007 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:01,007 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:01,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:01,208 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:01,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:01,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 113 times [2019-12-18 15:40:01,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:01,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908900529] [2019-12-18 15:40:01,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:01,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908900529] [2019-12-18 15:40:01,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264128896] [2019-12-18 15:40:01,287 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:01,328 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:40:01,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:01,329 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:01,330 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:01,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:01,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:01,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973048514] [2019-12-18 15:40:01,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:01,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:01,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:01,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:01,600 INFO L87 Difference]: Start difference. First operand 154 states and 352 transitions. Second operand 18 states. [2019-12-18 15:40:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:13,447 INFO L93 Difference]: Finished difference Result 238 states and 518 transitions. [2019-12-18 15:40:13,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:40:13,448 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:13,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:13,449 INFO L225 Difference]: With dead ends: 238 [2019-12-18 15:40:13,449 INFO L226 Difference]: Without dead ends: 237 [2019-12-18 15:40:13,449 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=302, Invalid=566, Unknown=2, NotChecked=0, Total=870 [2019-12-18 15:40:13,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-18 15:40:13,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 153. [2019-12-18 15:40:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 15:40:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 348 transitions. [2019-12-18 15:40:13,453 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 348 transitions. Word has length 14 [2019-12-18 15:40:13,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:13,453 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 348 transitions. [2019-12-18 15:40:13,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:13,453 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 348 transitions. [2019-12-18 15:40:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:13,453 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:13,454 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:13,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:13,657 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:13,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:13,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 114 times [2019-12-18 15:40:13,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:13,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605988390] [2019-12-18 15:40:13,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:13,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605988390] [2019-12-18 15:40:13,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334415] [2019-12-18 15:40:13,763 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:13,806 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:40:13,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:13,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:13,807 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:13,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:13,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:13,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93061118] [2019-12-18 15:40:13,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:13,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:13,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:13,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:13,974 INFO L87 Difference]: Start difference. First operand 153 states and 348 transitions. Second operand 18 states. [2019-12-18 15:40:14,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:14,854 INFO L93 Difference]: Finished difference Result 244 states and 529 transitions. [2019-12-18 15:40:14,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:40:14,854 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:14,855 INFO L225 Difference]: With dead ends: 244 [2019-12-18 15:40:14,855 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 15:40:14,856 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=282, Invalid=530, Unknown=0, NotChecked=0, Total=812 [2019-12-18 15:40:14,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 15:40:14,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 154. [2019-12-18 15:40:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 15:40:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 352 transitions. [2019-12-18 15:40:14,863 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 352 transitions. Word has length 14 [2019-12-18 15:40:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:14,863 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 352 transitions. [2019-12-18 15:40:14,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:14,864 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 352 transitions. [2019-12-18 15:40:14,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:14,864 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:14,864 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:15,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:15,069 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:15,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:15,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 115 times [2019-12-18 15:40:15,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:15,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691259653] [2019-12-18 15:40:15,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:15,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691259653] [2019-12-18 15:40:15,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305348202] [2019-12-18 15:40:15,164 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:15,206 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:15,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:15,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:15,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:15,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620164072] [2019-12-18 15:40:15,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:15,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:15,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:15,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:15,384 INFO L87 Difference]: Start difference. First operand 154 states and 352 transitions. Second operand 18 states. [2019-12-18 15:40:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:16,435 INFO L93 Difference]: Finished difference Result 234 states and 505 transitions. [2019-12-18 15:40:16,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:40:16,436 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:16,437 INFO L225 Difference]: With dead ends: 234 [2019-12-18 15:40:16,437 INFO L226 Difference]: Without dead ends: 230 [2019-12-18 15:40:16,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=338, Invalid=592, Unknown=0, NotChecked=0, Total=930 [2019-12-18 15:40:16,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-18 15:40:16,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 152. [2019-12-18 15:40:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 15:40:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 344 transitions. [2019-12-18 15:40:16,441 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 344 transitions. Word has length 14 [2019-12-18 15:40:16,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:16,442 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 344 transitions. [2019-12-18 15:40:16,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:16,442 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 344 transitions. [2019-12-18 15:40:16,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:16,442 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:16,442 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:16,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:16,645 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:16,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:16,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 116 times [2019-12-18 15:40:16,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:16,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376381010] [2019-12-18 15:40:16,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:16,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376381010] [2019-12-18 15:40:16,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042328473] [2019-12-18 15:40:16,724 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:16,766 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:40:16,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:16,767 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:16,768 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:17,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:17,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:17,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022705801] [2019-12-18 15:40:17,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:17,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:17,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:17,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:17,018 INFO L87 Difference]: Start difference. First operand 152 states and 344 transitions. Second operand 18 states. [2019-12-18 15:40:17,268 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2019-12-18 15:40:22,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:22,395 INFO L93 Difference]: Finished difference Result 211 states and 458 transitions. [2019-12-18 15:40:22,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:40:22,396 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:22,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:22,397 INFO L225 Difference]: With dead ends: 211 [2019-12-18 15:40:22,397 INFO L226 Difference]: Without dead ends: 210 [2019-12-18 15:40:22,397 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:40:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-18 15:40:22,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 149. [2019-12-18 15:40:22,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-18 15:40:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 335 transitions. [2019-12-18 15:40:22,400 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 335 transitions. Word has length 14 [2019-12-18 15:40:22,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:22,400 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 335 transitions. [2019-12-18 15:40:22,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 335 transitions. [2019-12-18 15:40:22,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:22,401 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:22,401 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:22,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:22,602 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:22,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:22,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 117 times [2019-12-18 15:40:22,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:22,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044716342] [2019-12-18 15:40:22,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:22,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044716342] [2019-12-18 15:40:22,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964496400] [2019-12-18 15:40:22,683 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:22,725 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 15:40:22,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:22,726 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:22,727 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:22,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:22,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:22,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291090637] [2019-12-18 15:40:22,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:22,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:22,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:22,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:22,840 INFO L87 Difference]: Start difference. First operand 149 states and 335 transitions. Second operand 18 states. [2019-12-18 15:40:23,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:23,243 INFO L93 Difference]: Finished difference Result 197 states and 429 transitions. [2019-12-18 15:40:23,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:40:23,243 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:23,244 INFO L225 Difference]: With dead ends: 197 [2019-12-18 15:40:23,244 INFO L226 Difference]: Without dead ends: 195 [2019-12-18 15:40:23,245 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=304, Invalid=626, Unknown=0, NotChecked=0, Total=930 [2019-12-18 15:40:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-18 15:40:23,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 154. [2019-12-18 15:40:23,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 15:40:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-18 15:40:23,248 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-18 15:40:23,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:23,248 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-18 15:40:23,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-18 15:40:23,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:23,249 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:23,249 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:23,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:23,449 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:23,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:23,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1460022991, now seen corresponding path program 118 times [2019-12-18 15:40:23,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:23,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143048919] [2019-12-18 15:40:23,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:23,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143048919] [2019-12-18 15:40:23,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131494302] [2019-12-18 15:40:23,531 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:23,576 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:40:23,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:23,577 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:23,577 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:23,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:23,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:23,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632155507] [2019-12-18 15:40:23,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:23,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:23,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:23,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:23,691 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 18 states. [2019-12-18 15:40:24,375 WARN L192 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 15:40:24,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:24,523 INFO L93 Difference]: Finished difference Result 212 states and 459 transitions. [2019-12-18 15:40:24,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:40:24,523 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:24,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:24,524 INFO L225 Difference]: With dead ends: 212 [2019-12-18 15:40:24,524 INFO L226 Difference]: Without dead ends: 209 [2019-12-18 15:40:24,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2019-12-18 15:40:24,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-18 15:40:24,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 155. [2019-12-18 15:40:24,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 15:40:24,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 351 transitions. [2019-12-18 15:40:24,528 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 351 transitions. Word has length 14 [2019-12-18 15:40:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:24,528 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 351 transitions. [2019-12-18 15:40:24,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:24,528 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 351 transitions. [2019-12-18 15:40:24,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:24,528 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:24,529 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:24,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:24,731 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:24,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:24,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1460023146, now seen corresponding path program 119 times [2019-12-18 15:40:24,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:24,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894296250] [2019-12-18 15:40:24,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:24,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894296250] [2019-12-18 15:40:24,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288458424] [2019-12-18 15:40:24,819 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:24,865 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 15:40:24,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:24,867 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:24,867 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:24,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:24,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:24,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265534629] [2019-12-18 15:40:24,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:24,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:24,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:24,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:24,976 INFO L87 Difference]: Start difference. First operand 155 states and 351 transitions. Second operand 18 states. [2019-12-18 15:40:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:25,364 INFO L93 Difference]: Finished difference Result 210 states and 457 transitions. [2019-12-18 15:40:25,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 15:40:25,365 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:25,366 INFO L225 Difference]: With dead ends: 210 [2019-12-18 15:40:25,366 INFO L226 Difference]: Without dead ends: 209 [2019-12-18 15:40:25,366 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=621, Unknown=0, NotChecked=0, Total=930 [2019-12-18 15:40:25,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-18 15:40:25,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 154. [2019-12-18 15:40:25,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 15:40:25,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-18 15:40:25,370 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-18 15:40:25,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:25,371 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-18 15:40:25,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:25,371 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-18 15:40:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:25,371 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:25,371 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:25,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:25,575 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:25,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:25,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167141, now seen corresponding path program 120 times [2019-12-18 15:40:25,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:25,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86488610] [2019-12-18 15:40:25,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:25,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86488610] [2019-12-18 15:40:25,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355617642] [2019-12-18 15:40:25,661 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:25,706 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:40:25,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:25,707 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:25,708 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:25,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:25,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:25,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999291862] [2019-12-18 15:40:25,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:25,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:25,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:25,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:25,924 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 18 states. [2019-12-18 15:40:28,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:28,118 INFO L93 Difference]: Finished difference Result 224 states and 482 transitions. [2019-12-18 15:40:28,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:40:28,119 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:28,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:28,120 INFO L225 Difference]: With dead ends: 224 [2019-12-18 15:40:28,120 INFO L226 Difference]: Without dead ends: 220 [2019-12-18 15:40:28,121 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=285, Invalid=584, Unknown=1, NotChecked=0, Total=870 [2019-12-18 15:40:28,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-18 15:40:28,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 156. [2019-12-18 15:40:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 15:40:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 354 transitions. [2019-12-18 15:40:28,125 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 354 transitions. Word has length 14 [2019-12-18 15:40:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:28,125 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 354 transitions. [2019-12-18 15:40:28,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:28,125 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 354 transitions. [2019-12-18 15:40:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:28,126 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:28,126 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:28,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:28,329 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:28,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:28,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167296, now seen corresponding path program 121 times [2019-12-18 15:40:28,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:28,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305533067] [2019-12-18 15:40:28,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:28,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305533067] [2019-12-18 15:40:28,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415407220] [2019-12-18 15:40:28,417 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:28,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:28,459 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:29,644 WARN L192 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 15:40:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:29,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:29,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:29,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834561885] [2019-12-18 15:40:29,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:29,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:29,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:29,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:29,646 INFO L87 Difference]: Start difference. First operand 156 states and 354 transitions. Second operand 18 states. [2019-12-18 15:40:30,384 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:40:31,609 WARN L192 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2019-12-18 15:40:33,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:33,007 INFO L93 Difference]: Finished difference Result 254 states and 544 transitions. [2019-12-18 15:40:33,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:40:33,008 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:33,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:33,009 INFO L225 Difference]: With dead ends: 254 [2019-12-18 15:40:33,009 INFO L226 Difference]: Without dead ends: 252 [2019-12-18 15:40:33,009 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=287, Invalid=583, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:40:33,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-18 15:40:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 156. [2019-12-18 15:40:33,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 15:40:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 355 transitions. [2019-12-18 15:40:33,013 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 355 transitions. Word has length 14 [2019-12-18 15:40:33,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:33,013 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 355 transitions. [2019-12-18 15:40:33,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:33,014 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 355 transitions. [2019-12-18 15:40:33,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:33,014 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:33,014 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:33,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:33,215 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1460171946, now seen corresponding path program 122 times [2019-12-18 15:40:33,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:33,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94881079] [2019-12-18 15:40:33,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:33,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94881079] [2019-12-18 15:40:33,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391375945] [2019-12-18 15:40:33,305 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:33,347 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:40:33,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:33,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:33,349 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:33,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:33,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:33,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584114356] [2019-12-18 15:40:33,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:33,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:33,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:33,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:33,487 INFO L87 Difference]: Start difference. First operand 156 states and 355 transitions. Second operand 18 states. [2019-12-18 15:40:34,228 WARN L192 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:40:34,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:34,722 INFO L93 Difference]: Finished difference Result 237 states and 511 transitions. [2019-12-18 15:40:34,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:40:34,723 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:34,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:34,724 INFO L225 Difference]: With dead ends: 237 [2019-12-18 15:40:34,724 INFO L226 Difference]: Without dead ends: 236 [2019-12-18 15:40:34,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=333, Invalid=659, Unknown=0, NotChecked=0, Total=992 [2019-12-18 15:40:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-12-18 15:40:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 154. [2019-12-18 15:40:34,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 15:40:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-18 15:40:34,728 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-18 15:40:34,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:34,728 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-18 15:40:34,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:34,728 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-18 15:40:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:34,728 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:34,728 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:34,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:34,929 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:34,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:34,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 123 times [2019-12-18 15:40:34,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:34,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533318906] [2019-12-18 15:40:34,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:35,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533318906] [2019-12-18 15:40:35,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967674686] [2019-12-18 15:40:35,017 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:35,065 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:40:35,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:35,066 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:35,066 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:35,589 WARN L192 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-18 15:40:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:35,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:35,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:35,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448229733] [2019-12-18 15:40:35,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:35,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:35,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:35,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:35,638 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 18 states. [2019-12-18 15:40:36,503 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-12-18 15:40:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:39,416 INFO L93 Difference]: Finished difference Result 214 states and 460 transitions. [2019-12-18 15:40:39,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 15:40:39,416 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:39,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:39,417 INFO L225 Difference]: With dead ends: 214 [2019-12-18 15:40:39,417 INFO L226 Difference]: Without dead ends: 209 [2019-12-18 15:40:39,418 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=398, Invalid=861, Unknown=1, NotChecked=0, Total=1260 [2019-12-18 15:40:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-18 15:40:39,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 157. [2019-12-18 15:40:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-18 15:40:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 357 transitions. [2019-12-18 15:40:39,421 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 357 transitions. Word has length 14 [2019-12-18 15:40:39,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:39,421 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 357 transitions. [2019-12-18 15:40:39,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:39,421 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 357 transitions. [2019-12-18 15:40:39,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:39,422 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:39,422 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:39,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:39,622 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:39,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:39,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 124 times [2019-12-18 15:40:39,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:39,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492971434] [2019-12-18 15:40:39,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:39,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492971434] [2019-12-18 15:40:39,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782751045] [2019-12-18 15:40:39,741 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:39,812 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:40:39,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:39,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:39,813 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:46,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:46,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:46,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708623442] [2019-12-18 15:40:46,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:46,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:46,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:46,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:40:46,764 INFO L87 Difference]: Start difference. First operand 157 states and 357 transitions. Second operand 18 states. [2019-12-18 15:40:49,839 WARN L192 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2019-12-18 15:40:51,905 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-18 15:40:57,358 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 15:40:58,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:40:58,281 INFO L93 Difference]: Finished difference Result 244 states and 528 transitions. [2019-12-18 15:40:58,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 15:40:58,281 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:40:58,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:40:58,282 INFO L225 Difference]: With dead ends: 244 [2019-12-18 15:40:58,282 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 15:40:58,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=328, Invalid=661, Unknown=3, NotChecked=0, Total=992 [2019-12-18 15:40:58,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 15:40:58,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 156. [2019-12-18 15:40:58,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-18 15:40:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 354 transitions. [2019-12-18 15:40:58,286 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 354 transitions. Word has length 14 [2019-12-18 15:40:58,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:40:58,286 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 354 transitions. [2019-12-18 15:40:58,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:40:58,286 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 354 transitions. [2019-12-18 15:40:58,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:40:58,286 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:40:58,286 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:40:58,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:58,487 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:40:58,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:40:58,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 125 times [2019-12-18 15:40:58,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:40:58,488 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237949274] [2019-12-18 15:40:58,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:40:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:40:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:58,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237949274] [2019-12-18 15:40:58,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352583243] [2019-12-18 15:40:58,575 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:40:58,619 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:40:58,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:40:58,620 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:40:58,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:40:59,215 WARN L192 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 15:40:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:40:59,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:40:59,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:40:59,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209802782] [2019-12-18 15:40:59,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:40:59,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:40:59,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:40:59,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:40:59,242 INFO L87 Difference]: Start difference. First operand 156 states and 354 transitions. Second operand 18 states. [2019-12-18 15:40:59,965 WARN L192 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-18 15:41:01,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:01,990 INFO L93 Difference]: Finished difference Result 273 states and 596 transitions. [2019-12-18 15:41:01,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 15:41:01,991 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:01,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:01,992 INFO L225 Difference]: With dead ends: 273 [2019-12-18 15:41:01,992 INFO L226 Difference]: Without dead ends: 271 [2019-12-18 15:41:01,993 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2019-12-18 15:41:01,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-18 15:41:01,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 163. [2019-12-18 15:41:01,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-12-18 15:41:01,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 380 transitions. [2019-12-18 15:41:01,997 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 380 transitions. Word has length 14 [2019-12-18 15:41:01,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:01,997 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 380 transitions. [2019-12-18 15:41:01,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:01,998 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 380 transitions. [2019-12-18 15:41:01,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:01,998 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:01,998 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:02,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:02,201 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:02,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:02,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 126 times [2019-12-18 15:41:02,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:02,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565792676] [2019-12-18 15:41:02,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:02,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565792676] [2019-12-18 15:41:02,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553683329] [2019-12-18 15:41:02,283 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:02,323 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:41:02,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:02,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:02,325 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:03,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:03,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:03,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161548498] [2019-12-18 15:41:03,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:03,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:03,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:03,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=212, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:41:03,573 INFO L87 Difference]: Start difference. First operand 163 states and 380 transitions. Second operand 18 states. [2019-12-18 15:41:04,587 WARN L192 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-18 15:41:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:06,629 INFO L93 Difference]: Finished difference Result 264 states and 575 transitions. [2019-12-18 15:41:06,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 15:41:06,630 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:06,630 INFO L225 Difference]: With dead ends: 264 [2019-12-18 15:41:06,631 INFO L226 Difference]: Without dead ends: 255 [2019-12-18 15:41:06,631 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=375, Invalid=744, Unknown=3, NotChecked=0, Total=1122 [2019-12-18 15:41:06,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-12-18 15:41:06,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 161. [2019-12-18 15:41:06,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-18 15:41:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 370 transitions. [2019-12-18 15:41:06,635 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 370 transitions. Word has length 14 [2019-12-18 15:41:06,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:06,635 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 370 transitions. [2019-12-18 15:41:06,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 370 transitions. [2019-12-18 15:41:06,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:06,635 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:06,635 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:06,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:06,839 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:06,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:06,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 127 times [2019-12-18 15:41:06,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:06,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604464749] [2019-12-18 15:41:06,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:06,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604464749] [2019-12-18 15:41:06,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566764136] [2019-12-18 15:41:06,930 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:06,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:06,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:07,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:07,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:07,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404772419] [2019-12-18 15:41:07,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:07,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:07,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:07,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:07,122 INFO L87 Difference]: Start difference. First operand 161 states and 370 transitions. Second operand 18 states. [2019-12-18 15:41:08,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:08,614 INFO L93 Difference]: Finished difference Result 254 states and 555 transitions. [2019-12-18 15:41:08,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 15:41:08,614 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:08,615 INFO L225 Difference]: With dead ends: 254 [2019-12-18 15:41:08,615 INFO L226 Difference]: Without dead ends: 252 [2019-12-18 15:41:08,616 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=369, Invalid=752, Unknown=1, NotChecked=0, Total=1122 [2019-12-18 15:41:08,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-18 15:41:08,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 163. [2019-12-18 15:41:08,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-12-18 15:41:08,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 377 transitions. [2019-12-18 15:41:08,620 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 377 transitions. Word has length 14 [2019-12-18 15:41:08,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:08,620 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 377 transitions. [2019-12-18 15:41:08,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:08,621 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 377 transitions. [2019-12-18 15:41:08,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:08,621 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:08,621 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:08,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:08,824 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:08,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:08,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 128 times [2019-12-18 15:41:08,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:08,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872581762] [2019-12-18 15:41:08,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:08,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872581762] [2019-12-18 15:41:08,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657600557] [2019-12-18 15:41:08,906 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:08,947 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:41:08,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:08,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:08,948 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:10,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:10,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:10,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753466436] [2019-12-18 15:41:10,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:10,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:10,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:10,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=211, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:41:10,642 INFO L87 Difference]: Start difference. First operand 163 states and 377 transitions. Second operand 18 states. [2019-12-18 15:41:11,596 WARN L192 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2019-12-18 15:41:12,554 WARN L192 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2019-12-18 15:41:12,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:12,794 INFO L93 Difference]: Finished difference Result 260 states and 569 transitions. [2019-12-18 15:41:12,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 15:41:12,795 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:12,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:12,796 INFO L225 Difference]: With dead ends: 260 [2019-12-18 15:41:12,796 INFO L226 Difference]: Without dead ends: 256 [2019-12-18 15:41:12,796 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=406, Invalid=783, Unknown=1, NotChecked=0, Total=1190 [2019-12-18 15:41:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-18 15:41:12,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 161. [2019-12-18 15:41:12,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-18 15:41:12,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 371 transitions. [2019-12-18 15:41:12,799 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 371 transitions. Word has length 14 [2019-12-18 15:41:12,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:12,800 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 371 transitions. [2019-12-18 15:41:12,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:12,800 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 371 transitions. [2019-12-18 15:41:12,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:12,800 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:12,800 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:13,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:13,001 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:13,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 129 times [2019-12-18 15:41:13,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:13,002 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412920563] [2019-12-18 15:41:13,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:13,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412920563] [2019-12-18 15:41:13,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685784037] [2019-12-18 15:41:13,078 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:13,116 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:41:13,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:13,117 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:13,118 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:13,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:13,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:13,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069218495] [2019-12-18 15:41:13,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:13,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:13,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:13,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:13,208 INFO L87 Difference]: Start difference. First operand 161 states and 371 transitions. Second operand 18 states. [2019-12-18 15:41:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:13,564 INFO L93 Difference]: Finished difference Result 201 states and 439 transitions. [2019-12-18 15:41:13,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:41:13,564 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:13,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:13,565 INFO L225 Difference]: With dead ends: 201 [2019-12-18 15:41:13,565 INFO L226 Difference]: Without dead ends: 195 [2019-12-18 15:41:13,566 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 15:41:13,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-18 15:41:13,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 162. [2019-12-18 15:41:13,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 15:41:13,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 371 transitions. [2019-12-18 15:41:13,569 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 371 transitions. Word has length 14 [2019-12-18 15:41:13,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:13,569 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 371 transitions. [2019-12-18 15:41:13,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 371 transitions. [2019-12-18 15:41:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:13,569 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:13,569 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:13,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:13,770 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:13,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:13,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 130 times [2019-12-18 15:41:13,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:13,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688962075] [2019-12-18 15:41:13,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:13,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688962075] [2019-12-18 15:41:13,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107802022] [2019-12-18 15:41:13,883 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:13,925 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:41:13,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:13,925 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:13,926 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:14,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:14,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:14,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191907118] [2019-12-18 15:41:14,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:14,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:14,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:14,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:14,024 INFO L87 Difference]: Start difference. First operand 162 states and 371 transitions. Second operand 18 states. [2019-12-18 15:41:14,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:14,465 INFO L93 Difference]: Finished difference Result 244 states and 530 transitions. [2019-12-18 15:41:14,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 15:41:14,465 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:14,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:14,466 INFO L225 Difference]: With dead ends: 244 [2019-12-18 15:41:14,466 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 15:41:14,467 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=728, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 15:41:14,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 15:41:14,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 161. [2019-12-18 15:41:14,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-18 15:41:14,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 368 transitions. [2019-12-18 15:41:14,470 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 368 transitions. Word has length 14 [2019-12-18 15:41:14,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:14,470 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 368 transitions. [2019-12-18 15:41:14,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:14,470 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 368 transitions. [2019-12-18 15:41:14,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:14,471 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:14,471 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:14,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:14,676 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:14,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 131 times [2019-12-18 15:41:14,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:14,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524058242] [2019-12-18 15:41:14,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:14,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524058242] [2019-12-18 15:41:14,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184566985] [2019-12-18 15:41:14,755 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:14,798 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:41:14,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:14,799 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:14,800 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:14,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:14,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:14,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078042524] [2019-12-18 15:41:14,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:14,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:14,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:14,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:14,905 INFO L87 Difference]: Start difference. First operand 161 states and 368 transitions. Second operand 18 states. [2019-12-18 15:41:15,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:15,383 INFO L93 Difference]: Finished difference Result 254 states and 558 transitions. [2019-12-18 15:41:15,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 15:41:15,384 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:15,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:15,385 INFO L225 Difference]: With dead ends: 254 [2019-12-18 15:41:15,385 INFO L226 Difference]: Without dead ends: 248 [2019-12-18 15:41:15,386 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=709, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 15:41:15,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-12-18 15:41:15,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 162. [2019-12-18 15:41:15,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 15:41:15,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 370 transitions. [2019-12-18 15:41:15,390 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 370 transitions. Word has length 14 [2019-12-18 15:41:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:15,390 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 370 transitions. [2019-12-18 15:41:15,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 370 transitions. [2019-12-18 15:41:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:15,390 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:15,391 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:15,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:15,593 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:15,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:15,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 132 times [2019-12-18 15:41:15,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:15,594 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871685506] [2019-12-18 15:41:15,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:15,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871685506] [2019-12-18 15:41:15,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855968316] [2019-12-18 15:41:15,685 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:15,725 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:41:15,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:15,726 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:15,726 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:15,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:15,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:15,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517207327] [2019-12-18 15:41:15,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:15,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:15,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:15,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:15,817 INFO L87 Difference]: Start difference. First operand 162 states and 370 transitions. Second operand 18 states. [2019-12-18 15:41:16,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:16,213 INFO L93 Difference]: Finished difference Result 255 states and 554 transitions. [2019-12-18 15:41:16,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 15:41:16,214 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:16,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:16,215 INFO L225 Difference]: With dead ends: 255 [2019-12-18 15:41:16,215 INFO L226 Difference]: Without dead ends: 254 [2019-12-18 15:41:16,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=668, Unknown=0, NotChecked=0, Total=992 [2019-12-18 15:41:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2019-12-18 15:41:16,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 162. [2019-12-18 15:41:16,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 15:41:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 370 transitions. [2019-12-18 15:41:16,219 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 370 transitions. Word has length 14 [2019-12-18 15:41:16,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:16,219 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 370 transitions. [2019-12-18 15:41:16,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:16,219 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 370 transitions. [2019-12-18 15:41:16,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:16,219 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:16,219 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:16,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:16,420 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:16,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:16,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 133 times [2019-12-18 15:41:16,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:16,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290551601] [2019-12-18 15:41:16,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:16,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290551601] [2019-12-18 15:41:16,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353680661] [2019-12-18 15:41:16,503 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:16,543 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:16,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:16,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:16,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:16,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499891605] [2019-12-18 15:41:16,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:16,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:16,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:16,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:16,635 INFO L87 Difference]: Start difference. First operand 162 states and 370 transitions. Second operand 18 states. [2019-12-18 15:41:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:16,962 INFO L93 Difference]: Finished difference Result 254 states and 559 transitions. [2019-12-18 15:41:16,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 15:41:16,962 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:16,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:16,963 INFO L225 Difference]: With dead ends: 254 [2019-12-18 15:41:16,963 INFO L226 Difference]: Without dead ends: 253 [2019-12-18 15:41:16,963 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2019-12-18 15:41:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2019-12-18 15:41:16,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 162. [2019-12-18 15:41:16,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-18 15:41:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 370 transitions. [2019-12-18 15:41:16,967 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 370 transitions. Word has length 14 [2019-12-18 15:41:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:16,967 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 370 transitions. [2019-12-18 15:41:16,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:16,967 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 370 transitions. [2019-12-18 15:41:16,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:16,968 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:16,968 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:17,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:17,169 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:17,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:17,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 134 times [2019-12-18 15:41:17,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:17,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032381266] [2019-12-18 15:41:17,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:17,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032381266] [2019-12-18 15:41:17,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133648755] [2019-12-18 15:41:17,254 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:17,292 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:41:17,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:17,293 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:17,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:17,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:17,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:17,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24875394] [2019-12-18 15:41:17,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:17,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:17,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:17,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:17,390 INFO L87 Difference]: Start difference. First operand 162 states and 370 transitions. Second operand 18 states. [2019-12-18 15:41:17,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:17,808 INFO L93 Difference]: Finished difference Result 250 states and 550 transitions. [2019-12-18 15:41:17,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 15:41:17,809 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:17,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:17,809 INFO L225 Difference]: With dead ends: 250 [2019-12-18 15:41:17,810 INFO L226 Difference]: Without dead ends: 247 [2019-12-18 15:41:17,810 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2019-12-18 15:41:17,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-12-18 15:41:17,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 158. [2019-12-18 15:41:17,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-18 15:41:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 359 transitions. [2019-12-18 15:41:17,814 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 359 transitions. Word has length 14 [2019-12-18 15:41:17,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:17,814 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 359 transitions. [2019-12-18 15:41:17,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:17,814 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 359 transitions. [2019-12-18 15:41:17,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:17,814 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:17,814 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:18,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:18,015 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:18,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:18,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 135 times [2019-12-18 15:41:18,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:18,016 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783306917] [2019-12-18 15:41:18,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:18,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783306917] [2019-12-18 15:41:18,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750674050] [2019-12-18 15:41:18,126 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:18,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 15:41:18,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:18,204 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 15:41:18,205 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:18,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:18,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:18,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254598930] [2019-12-18 15:41:18,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:18,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:18,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:18,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:18,390 INFO L87 Difference]: Start difference. First operand 158 states and 359 transitions. Second operand 18 states. [2019-12-18 15:41:19,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:19,058 INFO L93 Difference]: Finished difference Result 241 states and 526 transitions. [2019-12-18 15:41:19,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 15:41:19,059 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:19,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:19,059 INFO L225 Difference]: With dead ends: 241 [2019-12-18 15:41:19,060 INFO L226 Difference]: Without dead ends: 240 [2019-12-18 15:41:19,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 15:41:19,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-12-18 15:41:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 154. [2019-12-18 15:41:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-18 15:41:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 347 transitions. [2019-12-18 15:41:19,063 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 347 transitions. Word has length 14 [2019-12-18 15:41:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:19,063 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 347 transitions. [2019-12-18 15:41:19,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 347 transitions. [2019-12-18 15:41:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:19,064 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:19,064 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:19,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:19,265 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:19,265 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 136 times [2019-12-18 15:41:19,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:19,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822182084] [2019-12-18 15:41:19,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:19,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822182084] [2019-12-18 15:41:19,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108263430] [2019-12-18 15:41:19,353 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:19,397 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:41:19,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:19,398 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:19,398 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:19,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:19,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:19,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722588952] [2019-12-18 15:41:19,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:19,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:19,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:19,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:19,514 INFO L87 Difference]: Start difference. First operand 154 states and 347 transitions. Second operand 18 states. [2019-12-18 15:41:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:19,934 INFO L93 Difference]: Finished difference Result 193 states and 419 transitions. [2019-12-18 15:41:19,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 15:41:19,934 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:19,936 INFO L225 Difference]: With dead ends: 193 [2019-12-18 15:41:19,936 INFO L226 Difference]: Without dead ends: 191 [2019-12-18 15:41:19,936 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2019-12-18 15:41:19,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-18 15:41:19,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 150. [2019-12-18 15:41:19,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 15:41:19,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 343 transitions. [2019-12-18 15:41:19,940 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 343 transitions. Word has length 14 [2019-12-18 15:41:19,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:19,940 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 343 transitions. [2019-12-18 15:41:19,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:19,941 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 343 transitions. [2019-12-18 15:41:19,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:19,941 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:19,941 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:20,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:20,144 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:20,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:20,145 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 137 times [2019-12-18 15:41:20,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:20,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666745829] [2019-12-18 15:41:20,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:20,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666745829] [2019-12-18 15:41:20,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263549028] [2019-12-18 15:41:20,228 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:20,274 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:41:20,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:20,275 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:20,276 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:20,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:20,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:20,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851394922] [2019-12-18 15:41:20,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:20,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:20,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:20,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:20,821 INFO L87 Difference]: Start difference. First operand 150 states and 343 transitions. Second operand 18 states. [2019-12-18 15:41:21,397 WARN L192 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-12-18 15:41:21,995 WARN L192 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 15:41:22,714 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2019-12-18 15:41:23,252 WARN L192 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-18 15:41:23,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:23,489 INFO L93 Difference]: Finished difference Result 224 states and 477 transitions. [2019-12-18 15:41:23,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:41:23,489 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:23,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:23,490 INFO L225 Difference]: With dead ends: 224 [2019-12-18 15:41:23,490 INFO L226 Difference]: Without dead ends: 221 [2019-12-18 15:41:23,491 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=319, Invalid=673, Unknown=0, NotChecked=0, Total=992 [2019-12-18 15:41:23,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-18 15:41:23,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 152. [2019-12-18 15:41:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 15:41:23,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 350 transitions. [2019-12-18 15:41:23,498 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 350 transitions. Word has length 14 [2019-12-18 15:41:23,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:23,498 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 350 transitions. [2019-12-18 15:41:23,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:23,498 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 350 transitions. [2019-12-18 15:41:23,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:23,499 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:23,499 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:23,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:23,699 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:23,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:23,700 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 138 times [2019-12-18 15:41:23,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:23,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485490034] [2019-12-18 15:41:23,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:23,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485490034] [2019-12-18 15:41:23,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938876855] [2019-12-18 15:41:23,788 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:23,828 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-18 15:41:23,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:23,829 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:23,830 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:24,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:24,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:24,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740539794] [2019-12-18 15:41:24,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:24,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:24,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:24,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-18 15:41:24,239 INFO L87 Difference]: Start difference. First operand 152 states and 350 transitions. Second operand 18 states. [2019-12-18 15:41:24,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:24,903 INFO L93 Difference]: Finished difference Result 210 states and 454 transitions. [2019-12-18 15:41:24,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 15:41:24,903 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:24,904 INFO L225 Difference]: With dead ends: 210 [2019-12-18 15:41:24,904 INFO L226 Difference]: Without dead ends: 207 [2019-12-18 15:41:24,904 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2019-12-18 15:41:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-18 15:41:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 150. [2019-12-18 15:41:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 15:41:24,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 343 transitions. [2019-12-18 15:41:24,908 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 343 transitions. Word has length 14 [2019-12-18 15:41:24,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:24,908 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 343 transitions. [2019-12-18 15:41:24,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:24,908 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 343 transitions. [2019-12-18 15:41:24,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:24,908 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:24,908 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:25,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:25,109 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:25,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:25,110 INFO L82 PathProgramCache]: Analyzing trace with hash -595816365, now seen corresponding path program 139 times [2019-12-18 15:41:25,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:25,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780049090] [2019-12-18 15:41:25,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:25,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780049090] [2019-12-18 15:41:25,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454894873] [2019-12-18 15:41:25,210 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:25,280 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:25,281 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:25,898 WARN L192 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-18 15:41:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:37,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:37,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:37,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946401052] [2019-12-18 15:41:37,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:37,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:37,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:37,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=221, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:41:37,180 INFO L87 Difference]: Start difference. First operand 150 states and 343 transitions. Second operand 18 states. [2019-12-18 15:41:38,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:38,747 INFO L93 Difference]: Finished difference Result 220 states and 469 transitions. [2019-12-18 15:41:38,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 15:41:38,747 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:38,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:38,748 INFO L225 Difference]: With dead ends: 220 [2019-12-18 15:41:38,748 INFO L226 Difference]: Without dead ends: 218 [2019-12-18 15:41:38,748 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=316, Invalid=675, Unknown=1, NotChecked=0, Total=992 [2019-12-18 15:41:38,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-18 15:41:38,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 152. [2019-12-18 15:41:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-18 15:41:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 349 transitions. [2019-12-18 15:41:38,752 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 349 transitions. Word has length 14 [2019-12-18 15:41:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:38,752 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 349 transitions. [2019-12-18 15:41:38,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 349 transitions. [2019-12-18 15:41:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:38,753 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:38,753 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:38,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:38,954 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:38,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:38,955 INFO L82 PathProgramCache]: Analyzing trace with hash -595821015, now seen corresponding path program 140 times [2019-12-18 15:41:38,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:38,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293117616] [2019-12-18 15:41:38,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:39,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293117616] [2019-12-18 15:41:39,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702684832] [2019-12-18 15:41:39,042 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:39,082 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 15:41:39,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:39,082 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:39,083 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:40,074 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_493 Int)) (and (<= c_~i~0 (+ c_~j~0 v_~i~0_493)) (<= (div (+ (* v_~i~0_493 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ v_~i~0_493 1)))) is different from true [2019-12-18 15:41:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2019-12-18 15:41:41,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:41,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:41,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197921753] [2019-12-18 15:41:41,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:41,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:41,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:41,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=195, Unknown=2, NotChecked=30, Total=306 [2019-12-18 15:41:41,745 INFO L87 Difference]: Start difference. First operand 152 states and 349 transitions. Second operand 18 states. [2019-12-18 15:41:42,238 WARN L192 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-12-18 15:41:42,945 WARN L192 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2019-12-18 15:41:45,809 WARN L192 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-18 15:41:46,531 WARN L192 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2019-12-18 15:41:47,418 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2019-12-18 15:41:47,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:47,505 INFO L93 Difference]: Finished difference Result 250 states and 527 transitions. [2019-12-18 15:41:47,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 15:41:47,505 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:47,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:47,506 INFO L225 Difference]: With dead ends: 250 [2019-12-18 15:41:47,506 INFO L226 Difference]: Without dead ends: 243 [2019-12-18 15:41:47,506 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=343, Invalid=712, Unknown=5, NotChecked=62, Total=1122 [2019-12-18 15:41:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-18 15:41:47,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 155. [2019-12-18 15:41:47,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-18 15:41:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 359 transitions. [2019-12-18 15:41:47,510 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 359 transitions. Word has length 14 [2019-12-18 15:41:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:47,511 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 359 transitions. [2019-12-18 15:41:47,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:47,511 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 359 transitions. [2019-12-18 15:41:47,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:47,511 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:47,511 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:47,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:47,712 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:47,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:47,713 INFO L82 PathProgramCache]: Analyzing trace with hash -595821170, now seen corresponding path program 141 times [2019-12-18 15:41:47,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:47,713 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790485315] [2019-12-18 15:41:47,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:47,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790485315] [2019-12-18 15:41:47,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533950192] [2019-12-18 15:41:47,793 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:47,837 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 15:41:47,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:47,838 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:47,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:50,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:50,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:50,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388510788] [2019-12-18 15:41:50,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:50,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:50,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:50,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=222, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:41:50,835 INFO L87 Difference]: Start difference. First operand 155 states and 359 transitions. Second operand 18 states. [2019-12-18 15:41:52,123 WARN L192 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2019-12-18 15:41:52,807 WARN L192 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-18 15:41:55,500 WARN L192 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-18 15:41:56,987 WARN L192 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-18 15:41:57,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:41:57,578 INFO L93 Difference]: Finished difference Result 237 states and 506 transitions. [2019-12-18 15:41:57,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 15:41:57,579 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:41:57,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:41:57,579 INFO L225 Difference]: With dead ends: 237 [2019-12-18 15:41:57,580 INFO L226 Difference]: Without dead ends: 235 [2019-12-18 15:41:57,580 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=331, Invalid=721, Unknown=4, NotChecked=0, Total=1056 [2019-12-18 15:41:57,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-18 15:41:57,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 153. [2019-12-18 15:41:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-18 15:41:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 352 transitions. [2019-12-18 15:41:57,583 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 352 transitions. Word has length 14 [2019-12-18 15:41:57,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:41:57,583 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 352 transitions. [2019-12-18 15:41:57,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:41:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 352 transitions. [2019-12-18 15:41:57,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:41:57,584 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:41:57,584 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:41:57,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:57,785 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:41:57,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:41:57,785 INFO L82 PathProgramCache]: Analyzing trace with hash -595965320, now seen corresponding path program 142 times [2019-12-18 15:41:57,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:41:57,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021907840] [2019-12-18 15:41:57,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:41:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:41:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:57,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021907840] [2019-12-18 15:41:57,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506127510] [2019-12-18 15:41:57,865 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:41:57,905 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 15:41:57,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:41:57,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:41:57,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:41:59,275 WARN L192 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-18 15:41:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:41:59,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:41:59,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:41:59,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309260725] [2019-12-18 15:41:59,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:41:59,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:41:59,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:41:59,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=221, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:41:59,277 INFO L87 Difference]: Start difference. First operand 153 states and 352 transitions. Second operand 18 states. [2019-12-18 15:42:00,634 WARN L192 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-18 15:42:02,725 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 15:42:03,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 15:42:03,154 INFO L93 Difference]: Finished difference Result 234 states and 503 transitions. [2019-12-18 15:42:03,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 15:42:03,155 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-18 15:42:03,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 15:42:03,156 INFO L225 Difference]: With dead ends: 234 [2019-12-18 15:42:03,156 INFO L226 Difference]: Without dead ends: 233 [2019-12-18 15:42:03,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=365, Invalid=755, Unknown=2, NotChecked=0, Total=1122 [2019-12-18 15:42:03,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-18 15:42:03,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 150. [2019-12-18 15:42:03,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-18 15:42:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 343 transitions. [2019-12-18 15:42:03,159 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 343 transitions. Word has length 14 [2019-12-18 15:42:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 15:42:03,159 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 343 transitions. [2019-12-18 15:42:03,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 15:42:03,159 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 343 transitions. [2019-12-18 15:42:03,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 15:42:03,159 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 15:42:03,159 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 15:42:03,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:42:03,360 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 15:42:03,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 15:42:03,361 INFO L82 PathProgramCache]: Analyzing trace with hash -734344515, now seen corresponding path program 143 times [2019-12-18 15:42:03,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 15:42:03,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767871406] [2019-12-18 15:42:03,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 15:42:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 15:42:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:42:03,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767871406] [2019-12-18 15:42:03,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845180298] [2019-12-18 15:42:03,487 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:42:03,557 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 15:42:03,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 15:42:03,559 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 15:42:03,559 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 15:42:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 15:42:07,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 15:42:07,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-18 15:42:07,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355308641] [2019-12-18 15:42:07,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 15:42:07,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 15:42:07,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 15:42:07,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=223, Unknown=1, NotChecked=0, Total=306 [2019-12-18 15:42:07,882 INFO L87 Difference]: Start difference. First operand 150 states and 343 transitions. Second operand 18 states. Received shutdown request... [2019-12-18 15:42:08,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 15:42:08,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 15:42:08,860 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-18 15:42:08,865 WARN L227 ceAbstractionStarter]: Timeout [2019-12-18 15:42:08,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 03:42:08 BasicIcfg [2019-12-18 15:42:08,865 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 15:42:08,867 INFO L168 Benchmark]: Toolchain (without parser) took 284954.55 ms. Allocated memory was 138.9 MB in the beginning and 185.1 MB in the end (delta: 46.1 MB). Free memory was 101.6 MB in the beginning and 103.4 MB in the end (delta: -1.7 MB). Peak memory consumption was 44.4 MB. Max. memory is 7.1 GB. [2019-12-18 15:42:08,867 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-12-18 15:42:08,867 INFO L168 Benchmark]: CACSL2BoogieTranslator took 668.42 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 101.2 MB in the beginning and 161.7 MB in the end (delta: -60.4 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2019-12-18 15:42:08,867 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.06 ms. Allocated memory is still 202.4 MB. Free memory was 161.7 MB in the beginning and 159.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-18 15:42:08,868 INFO L168 Benchmark]: Boogie Preprocessor took 25.57 ms. Allocated memory is still 202.4 MB. Free memory was 159.7 MB in the beginning and 158.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-18 15:42:08,868 INFO L168 Benchmark]: RCFGBuilder took 421.79 ms. Allocated memory is still 202.4 MB. Free memory was 158.3 MB in the beginning and 138.5 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2019-12-18 15:42:08,868 INFO L168 Benchmark]: TraceAbstraction took 283777.32 ms. Allocated memory was 202.4 MB in the beginning and 185.1 MB in the end (delta: -17.3 MB). Free memory was 137.8 MB in the beginning and 103.4 MB in the end (delta: 34.5 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2019-12-18 15:42:08,870 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 668.42 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 101.2 MB in the beginning and 161.7 MB in the end (delta: -60.4 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 56.06 ms. Allocated memory is still 202.4 MB. Free memory was 161.7 MB in the beginning and 159.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.57 ms. Allocated memory is still 202.4 MB. Free memory was 159.7 MB in the beginning and 158.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 421.79 ms. Allocated memory is still 202.4 MB. Free memory was 158.3 MB in the beginning and 138.5 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 283777.32 ms. Allocated memory was 202.4 MB in the beginning and 185.1 MB in the end (delta: -17.3 MB). Free memory was 137.8 MB in the beginning and 103.4 MB in the end (delta: 34.5 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 55 ProgramPointsBefore, 16 ProgramPointsAfterwards, 53 TransitionsBefore, 14 TransitionsAfterwards, 836 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 433 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 686 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (150states) and FLOYD_HOARE automaton (currently 15 states, 18 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 30 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 283.6s, OverallIterations: 157, TraceHistogramMax: 7, AutomataDifference: 164.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1556 SDtfs, 19056 SDslu, 12044 SDs, 0 SdLazy, 6934 SolverSat, 3847 SolverUnsat, 39 SolverUnknown, 0 SolverNotchecked, 51.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4256 GetRequests, 753 SyntacticMatches, 7 SemanticMatches, 3495 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 19988 ImplicationChecksByTransitivity, 184.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=163occurred in iteration=139, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 156 MinimizatonAttempts, 7304 StatesRemovedByMinimization, 153 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 77.5s InterpolantComputationTime, 3891 NumberOfCodeBlocks, 3891 NumberOfCodeBlocksAsserted, 505 NumberOfCheckSat, 3582 ConstructedInterpolants, 157 QuantifiedInterpolants, 416730 SizeOfPredicates, 0 NumberOfNonLiveVariables, 14032 ConjunctsInSsa, 1632 ConjunctsInUnsatCore, 309 InterpolantComputations, 7 PerfectInterpolantSequences, 36/2152 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown