/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-26 20:45:18,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-26 20:45:18,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-26 20:45:18,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-26 20:45:18,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-26 20:45:18,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-26 20:45:18,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-26 20:45:18,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-26 20:45:18,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-26 20:45:18,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-26 20:45:18,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-26 20:45:18,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-26 20:45:18,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-26 20:45:18,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-26 20:45:18,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-26 20:45:18,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-26 20:45:18,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-26 20:45:18,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-26 20:45:18,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-26 20:45:18,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-26 20:45:18,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-26 20:45:18,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-26 20:45:18,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-26 20:45:18,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-26 20:45:18,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-26 20:45:18,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-26 20:45:18,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-26 20:45:18,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-26 20:45:18,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-26 20:45:18,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-26 20:45:18,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-26 20:45:18,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-26 20:45:18,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-26 20:45:18,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-26 20:45:18,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-26 20:45:18,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-26 20:45:18,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-26 20:45:18,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-26 20:45:18,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-26 20:45:18,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-26 20:45:18,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-26 20:45:18,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-26 20:45:18,825 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-26 20:45:18,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-26 20:45:18,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-26 20:45:18,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-26 20:45:18,827 INFO L138 SettingsManager]: * Use SBE=true [2019-12-26 20:45:18,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-26 20:45:18,828 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-26 20:45:18,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-26 20:45:18,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-26 20:45:18,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-26 20:45:18,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-26 20:45:18,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-26 20:45:18,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-26 20:45:18,831 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-26 20:45:18,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-26 20:45:18,832 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-26 20:45:18,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-26 20:45:18,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-26 20:45:18,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-26 20:45:18,832 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-26 20:45:18,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-26 20:45:18,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-26 20:45:18,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-26 20:45:18,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-26 20:45:18,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-26 20:45:18,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-26 20:45:18,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-26 20:45:18,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-26 20:45:18,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-26 20:45:18,835 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-26 20:45:19,128 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-26 20:45:19,142 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-26 20:45:19,146 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-26 20:45:19,147 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-26 20:45:19,147 INFO L275 PluginConnector]: CDTParser initialized [2019-12-26 20:45:19,148 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2019-12-26 20:45:19,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db3f67f56/6a1e440e5e094c278b04a1812741694a/FLAG74abfc2c0 [2019-12-26 20:45:19,785 INFO L306 CDTParser]: Found 1 translation units. [2019-12-26 20:45:19,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2019-12-26 20:45:19,804 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db3f67f56/6a1e440e5e094c278b04a1812741694a/FLAG74abfc2c0 [2019-12-26 20:45:20,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db3f67f56/6a1e440e5e094c278b04a1812741694a [2019-12-26 20:45:20,039 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-26 20:45:20,040 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-26 20:45:20,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-26 20:45:20,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-26 20:45:20,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-26 20:45:20,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.12 08:45:20" (1/1) ... [2019-12-26 20:45:20,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34bee71e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:20, skipping insertion in model container [2019-12-26 20:45:20,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.12 08:45:20" (1/1) ... [2019-12-26 20:45:20,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-26 20:45:20,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-26 20:45:20,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-26 20:45:20,578 INFO L203 MainTranslator]: Completed pre-run [2019-12-26 20:45:20,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-26 20:45:20,715 INFO L208 MainTranslator]: Completed translation [2019-12-26 20:45:20,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:20 WrapperNode [2019-12-26 20:45:20,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-26 20:45:20,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-26 20:45:20,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-26 20:45:20,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-26 20:45:20,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:20" (1/1) ... [2019-12-26 20:45:20,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:20" (1/1) ... [2019-12-26 20:45:20,790 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-26 20:45:20,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-26 20:45:20,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-26 20:45:20,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-26 20:45:20,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:20" (1/1) ... [2019-12-26 20:45:20,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:20" (1/1) ... [2019-12-26 20:45:20,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:20" (1/1) ... [2019-12-26 20:45:20,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:20" (1/1) ... [2019-12-26 20:45:20,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:20" (1/1) ... [2019-12-26 20:45:20,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:20" (1/1) ... [2019-12-26 20:45:20,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:20" (1/1) ... [2019-12-26 20:45:20,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-26 20:45:20,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-26 20:45:20,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-26 20:45:20,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-26 20:45:20,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:20" (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 [2019-12-26 20:45:20,873 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-26 20:45:20,873 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-26 20:45:20,873 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-26 20:45:20,873 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-26 20:45:20,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-26 20:45:20,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-26 20:45:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-26 20:45:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-26 20:45:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-26 20:45:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-26 20:45:20,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-26 20:45:20,876 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-26 20:45:21,266 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-26 20:45:21,266 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-26 20:45:21,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.12 08:45:21 BoogieIcfgContainer [2019-12-26 20:45:21,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-26 20:45:21,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-26 20:45:21,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-26 20:45:21,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-26 20:45:21,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.12 08:45:20" (1/3) ... [2019-12-26 20:45:21,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238bbc49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.12 08:45:21, skipping insertion in model container [2019-12-26 20:45:21,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:45:20" (2/3) ... [2019-12-26 20:45:21,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238bbc49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.12 08:45:21, skipping insertion in model container [2019-12-26 20:45:21,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.12 08:45:21" (3/3) ... [2019-12-26 20:45:21,277 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2019-12-26 20:45:21,286 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-26 20:45:21,287 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-26 20:45:21,293 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-26 20:45:21,294 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-26 20:45:21,320 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,320 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,321 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,321 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,321 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,322 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,322 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,322 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,323 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,323 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,323 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,323 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,324 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,324 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,324 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,325 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,325 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,325 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,325 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,326 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,326 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,326 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,327 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,327 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,327 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,328 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,328 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,328 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,329 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,329 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,333 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,333 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,334 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,334 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,334 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,334 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,340 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,340 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,341 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,341 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,341 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,341 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:45:21,357 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-26 20:45:21,378 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-26 20:45:21,378 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-26 20:45:21,379 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-26 20:45:21,379 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-26 20:45:21,379 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-26 20:45:21,379 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-26 20:45:21,379 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-26 20:45:21,379 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-26 20:45:21,393 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-26 20:45:21,395 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-26 20:45:21,439 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-26 20:45:21,440 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-26 20:45:21,449 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. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-26 20:45:21,454 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-26 20:45:21,480 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-26 20:45:21,480 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-26 20:45:21,482 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. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-26 20:45:21,484 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-26 20:45:21,485 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-26 20:45:22,731 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-26 20:45:22,862 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-26 20:45:22,863 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-26 20:45:22,867 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-26 20:45:22,877 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-26 20:45:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-26 20:45:22,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-26 20:45:22,886 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:22,887 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-26 20:45:22,887 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:22,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:22,894 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-26 20:45:22,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:22,905 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141609046] [2019-12-26 20:45:22,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:23,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141609046] [2019-12-26 20:45:23,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:23,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-26 20:45:23,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256271419] [2019-12-26 20:45:23,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-26 20:45:23,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:23,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-26 20:45:23,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-26 20:45:23,267 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-26 20:45:23,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:23,314 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-26 20:45:23,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-26 20:45:23,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-26 20:45:23,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:23,347 INFO L225 Difference]: With dead ends: 54 [2019-12-26 20:45:23,347 INFO L226 Difference]: Without dead ends: 36 [2019-12-26 20:45:23,349 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 [2019-12-26 20:45:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-26 20:45:23,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-26 20:45:23,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-26 20:45:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-26 20:45:23,399 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-26 20:45:23,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:23,400 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-26 20:45:23,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-26 20:45:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-26 20:45:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-26 20:45:23,405 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:23,405 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:23,412 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:23,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:23,413 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-26 20:45:23,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:23,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139651634] [2019-12-26 20:45:23,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:23,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139651634] [2019-12-26 20:45:23,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:23,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-26 20:45:23,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239611977] [2019-12-26 20:45:23,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-26 20:45:23,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:23,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-26 20:45:23,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-26 20:45:23,547 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-26 20:45:23,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:23,569 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-26 20:45:23,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-26 20:45:23,570 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-26 20:45:23,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:23,571 INFO L225 Difference]: With dead ends: 42 [2019-12-26 20:45:23,571 INFO L226 Difference]: Without dead ends: 41 [2019-12-26 20:45:23,572 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 [2019-12-26 20:45:23,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-26 20:45:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-26 20:45:23,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-26 20:45:23,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-26 20:45:23,579 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-26 20:45:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:23,580 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-26 20:45:23,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-26 20:45:23,580 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-26 20:45:23,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-26 20:45:23,581 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:23,581 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:23,581 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:23,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:23,582 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-26 20:45:23,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:23,582 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072471306] [2019-12-26 20:45:23,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:23,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072471306] [2019-12-26 20:45:23,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:23,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-26 20:45:23,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752425559] [2019-12-26 20:45:23,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-26 20:45:23,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:23,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-26 20:45:23,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-26 20:45:23,635 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-26 20:45:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:23,651 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-26 20:45:23,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-26 20:45:23,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-26 20:45:23,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:23,653 INFO L225 Difference]: With dead ends: 51 [2019-12-26 20:45:23,653 INFO L226 Difference]: Without dead ends: 50 [2019-12-26 20:45:23,654 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 [2019-12-26 20:45:23,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-26 20:45:23,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-26 20:45:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-26 20:45:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-26 20:45:23,661 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-26 20:45:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:23,662 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-26 20:45:23,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-26 20:45:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-26 20:45:23,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-26 20:45:23,663 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:23,663 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:23,663 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:23,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:23,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-26 20:45:23,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:23,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193316106] [2019-12-26 20:45:23,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:23,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193316106] [2019-12-26 20:45:23,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921254113] [2019-12-26 20:45:23,732 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 [2019-12-26 20:45:23,805 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:23,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:23,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-26 20:45:23,815 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:23,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:23,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-26 20:45:23,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339556991] [2019-12-26 20:45:23,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:45:23,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:23,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:45:23,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-26 20:45:23,880 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-26 20:45:23,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:23,915 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-26 20:45:23,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:23,916 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-26 20:45:23,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:23,917 INFO L225 Difference]: With dead ends: 56 [2019-12-26 20:45:23,918 INFO L226 Difference]: Without dead ends: 55 [2019-12-26 20:45:23,918 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 [2019-12-26 20:45:23,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-26 20:45:23,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-26 20:45:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-26 20:45:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-26 20:45:23,931 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-26 20:45:23,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:23,932 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-26 20:45:23,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:45:23,932 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-26 20:45:23,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-26 20:45:23,933 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:23,933 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:24,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:24,140 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:24,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:24,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-26 20:45:24,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:24,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753146010] [2019-12-26 20:45:24,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:24,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753146010] [2019-12-26 20:45:24,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182799788] [2019-12-26 20:45:24,232 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 [2019-12-26 20:45:24,283 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:24,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:24,285 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-26 20:45:24,286 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:24,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:24,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-26 20:45:24,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693779988] [2019-12-26 20:45:24,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:45:24,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:24,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:45:24,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-26 20:45:24,330 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 8 states. [2019-12-26 20:45:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:24,400 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-26 20:45:24,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:24,402 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-26 20:45:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:24,403 INFO L225 Difference]: With dead ends: 63 [2019-12-26 20:45:24,403 INFO L226 Difference]: Without dead ends: 62 [2019-12-26 20:45:24,407 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 [2019-12-26 20:45:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-26 20:45:24,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-26 20:45:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-26 20:45:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-26 20:45:24,417 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-26 20:45:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:24,420 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-26 20:45:24,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:45:24,420 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-26 20:45:24,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:24,421 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:24,421 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:24,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:24,622 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:24,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:24,622 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-26 20:45:24,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:24,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045550613] [2019-12-26 20:45:24,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:24,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045550613] [2019-12-26 20:45:24,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172284585] [2019-12-26 20:45:24,705 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 [2019-12-26 20:45:24,753 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:24,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:24,754 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:24,756 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:24,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:24,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:24,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578087077] [2019-12-26 20:45:24,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:24,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:24,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:24,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:24,839 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-26 20:45:24,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:24,865 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-26 20:45:24,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-26 20:45:24,866 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-26 20:45:24,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:24,867 INFO L225 Difference]: With dead ends: 66 [2019-12-26 20:45:24,867 INFO L226 Difference]: Without dead ends: 65 [2019-12-26 20:45:24,867 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 [2019-12-26 20:45:24,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-26 20:45:24,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-26 20:45:24,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-26 20:45:24,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-26 20:45:24,874 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-26 20:45:24,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:24,875 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-26 20:45:24,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:24,875 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-26 20:45:24,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:24,876 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:24,876 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:25,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:25,079 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:25,080 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-26 20:45:25,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:25,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432901796] [2019-12-26 20:45:25,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:25,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432901796] [2019-12-26 20:45:25,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:25,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-26 20:45:25,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581172294] [2019-12-26 20:45:25,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-26 20:45:25,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:25,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-26 20:45:25,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-26 20:45:25,218 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-26 20:45:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:25,245 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-26 20:45:25,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:25,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-26 20:45:25,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:25,247 INFO L225 Difference]: With dead ends: 68 [2019-12-26 20:45:25,247 INFO L226 Difference]: Without dead ends: 67 [2019-12-26 20:45:25,247 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 [2019-12-26 20:45:25,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-26 20:45:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-26 20:45:25,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-26 20:45:25,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-26 20:45:25,269 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-26 20:45:25,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:25,272 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-26 20:45:25,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-26 20:45:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-26 20:45:25,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:25,273 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:25,273 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:25,273 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:25,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:25,274 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-26 20:45:25,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:25,274 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640048479] [2019-12-26 20:45:25,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:25,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640048479] [2019-12-26 20:45:25,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:45:25,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-26 20:45:25,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439767782] [2019-12-26 20:45:25,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-26 20:45:25,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-26 20:45:25,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-26 20:45:25,343 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-26 20:45:25,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:25,370 INFO L93 Difference]: Finished difference Result 69 states and 145 transitions. [2019-12-26 20:45:25,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:45:25,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-26 20:45:25,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:25,372 INFO L225 Difference]: With dead ends: 69 [2019-12-26 20:45:25,372 INFO L226 Difference]: Without dead ends: 68 [2019-12-26 20:45:25,372 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 [2019-12-26 20:45:25,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-26 20:45:25,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2019-12-26 20:45:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-26 20:45:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-26 20:45:25,378 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-26 20:45:25,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:25,379 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-26 20:45:25,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-26 20:45:25,379 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-26 20:45:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:45:25,380 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:25,380 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:25,380 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:25,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:25,380 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-26 20:45:25,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:25,381 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666967487] [2019-12-26 20:45:25,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:25,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666967487] [2019-12-26 20:45:25,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181903470] [2019-12-26 20:45:25,436 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 [2019-12-26 20:45:25,497 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:25,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:25,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:25,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:25,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:25,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:25,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680520720] [2019-12-26 20:45:25,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:25,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:25,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:25,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:25,551 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 10 states. [2019-12-26 20:45:25,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:25,621 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-26 20:45:25,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-26 20:45:25,622 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-26 20:45:25,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:25,623 INFO L225 Difference]: With dead ends: 77 [2019-12-26 20:45:25,623 INFO L226 Difference]: Without dead ends: 76 [2019-12-26 20:45:25,624 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 [2019-12-26 20:45:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-26 20:45:25,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-26 20:45:25,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-26 20:45:25,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-26 20:45:25,641 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-26 20:45:25,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:25,641 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-26 20:45:25,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:25,642 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-26 20:45:25,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:25,642 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:25,642 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:25,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:25,843 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:25,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:25,844 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-26 20:45:25,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:25,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745828370] [2019-12-26 20:45:25,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:25,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745828370] [2019-12-26 20:45:25,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389059668] [2019-12-26 20:45:25,951 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 [2019-12-26 20:45:26,029 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:26,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:26,030 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:26,032 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:26,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:26,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:26,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166460360] [2019-12-26 20:45:26,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:26,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:26,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:26,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:26,167 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-26 20:45:26,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:26,203 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-26 20:45:26,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:45:26,204 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-26 20:45:26,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:26,205 INFO L225 Difference]: With dead ends: 80 [2019-12-26 20:45:26,205 INFO L226 Difference]: Without dead ends: 79 [2019-12-26 20:45:26,206 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 [2019-12-26 20:45:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-26 20:45:26,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-26 20:45:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-26 20:45:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-26 20:45:26,219 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-26 20:45:26,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:26,220 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-26 20:45:26,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:26,221 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-26 20:45:26,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:26,224 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:26,224 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:26,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:26,433 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:26,433 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-26 20:45:26,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:26,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550817465] [2019-12-26 20:45:26,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:26,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550817465] [2019-12-26 20:45:26,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415951845] [2019-12-26 20:45:26,490 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 [2019-12-26 20:45:26,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:26,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:26,537 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:26,538 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:26,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:26,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:26,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253607667] [2019-12-26 20:45:26,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:26,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:26,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:26,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:26,606 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-26 20:45:26,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:26,688 INFO L93 Difference]: Finished difference Result 81 states and 174 transitions. [2019-12-26 20:45:26,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-26 20:45:26,689 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:26,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:26,690 INFO L225 Difference]: With dead ends: 81 [2019-12-26 20:45:26,690 INFO L226 Difference]: Without dead ends: 80 [2019-12-26 20:45:26,690 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 [2019-12-26 20:45:26,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-26 20:45:26,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2019-12-26 20:45:26,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-26 20:45:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-26 20:45:26,708 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-26 20:45:26,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:26,708 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-26 20:45:26,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-26 20:45:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:26,709 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:26,709 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:26,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:26,915 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-26 20:45:26,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:26,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704085787] [2019-12-26 20:45:26,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:26,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704085787] [2019-12-26 20:45:26,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210929766] [2019-12-26 20:45:26,986 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 [2019-12-26 20:45:27,037 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:27,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:27,038 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:27,039 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:27,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:27,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:27,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717563739] [2019-12-26 20:45:27,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:27,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:27,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:27,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:27,094 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-26 20:45:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:27,162 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-26 20:45:27,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-26 20:45:27,163 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:27,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:27,163 INFO L225 Difference]: With dead ends: 85 [2019-12-26 20:45:27,164 INFO L226 Difference]: Without dead ends: 84 [2019-12-26 20:45:27,164 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 [2019-12-26 20:45:27,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-26 20:45:27,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2019-12-26 20:45:27,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-26 20:45:27,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-26 20:45:27,169 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-26 20:45:27,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:27,169 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-26 20:45:27,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:27,170 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-26 20:45:27,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:27,170 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:27,170 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:27,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:27,375 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:27,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:27,375 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-26 20:45:27,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:27,375 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968910356] [2019-12-26 20:45:27,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:27,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968910356] [2019-12-26 20:45:27,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054608355] [2019-12-26 20:45:27,433 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 [2019-12-26 20:45:27,479 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:27,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:27,480 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:27,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:27,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:27,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:27,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85879227] [2019-12-26 20:45:27,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:27,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:27,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:27,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:27,547 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-26 20:45:27,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:27,650 INFO L93 Difference]: Finished difference Result 86 states and 182 transitions. [2019-12-26 20:45:27,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:27,651 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:27,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:27,652 INFO L225 Difference]: With dead ends: 86 [2019-12-26 20:45:27,652 INFO L226 Difference]: Without dead ends: 85 [2019-12-26 20:45:27,652 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 [2019-12-26 20:45:27,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-26 20:45:27,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2019-12-26 20:45:27,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-26 20:45:27,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-26 20:45:27,657 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-26 20:45:27,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:27,657 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-26 20:45:27,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:27,657 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-26 20:45:27,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:27,658 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:27,658 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:27,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:27,862 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:27,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:27,863 INFO L82 PathProgramCache]: Analyzing trace with hash 507891352, now seen corresponding path program 6 times [2019-12-26 20:45:27,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:27,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961024484] [2019-12-26 20:45:27,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:27,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961024484] [2019-12-26 20:45:27,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246634189] [2019-12-26 20:45:27,939 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 [2019-12-26 20:45:27,992 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:45:27,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:27,993 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:27,994 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:28,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:28,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:28,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142020844] [2019-12-26 20:45:28,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:28,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:28,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:28,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:28,039 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-26 20:45:28,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:28,108 INFO L93 Difference]: Finished difference Result 90 states and 186 transitions. [2019-12-26 20:45:28,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:45:28,109 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:28,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:28,110 INFO L225 Difference]: With dead ends: 90 [2019-12-26 20:45:28,110 INFO L226 Difference]: Without dead ends: 89 [2019-12-26 20:45:28,111 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-26 20:45:28,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2019-12-26 20:45:28,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-26 20:45:28,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-26 20:45:28,114 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-26 20:45:28,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:28,115 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-26 20:45:28,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:28,115 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-26 20:45:28,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:28,116 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:28,116 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:28,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:28,324 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:28,325 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 7 times [2019-12-26 20:45:28,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:28,325 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780276344] [2019-12-26 20:45:28,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:28,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780276344] [2019-12-26 20:45:28,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872192778] [2019-12-26 20:45:28,401 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 [2019-12-26 20:45:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:28,451 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:28,452 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:28,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:28,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:28,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010055510] [2019-12-26 20:45:28,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:28,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:28,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:28,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:28,494 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-26 20:45:28,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:28,614 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-26 20:45:28,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:28,614 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:28,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:28,616 INFO L225 Difference]: With dead ends: 88 [2019-12-26 20:45:28,616 INFO L226 Difference]: Without dead ends: 87 [2019-12-26 20:45:28,616 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 [2019-12-26 20:45:28,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-26 20:45:28,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2019-12-26 20:45:28,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-26 20:45:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-26 20:45:28,621 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-26 20:45:28,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:28,621 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-26 20:45:28,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-26 20:45:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:28,622 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:28,622 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:28,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:28,828 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:28,829 INFO L82 PathProgramCache]: Analyzing trace with hash 507886547, now seen corresponding path program 8 times [2019-12-26 20:45:28,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:28,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90695183] [2019-12-26 20:45:28,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:28,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90695183] [2019-12-26 20:45:28,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830901008] [2019-12-26 20:45:28,932 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 [2019-12-26 20:45:28,983 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:28,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:28,984 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:45:28,986 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:29,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:29,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-26 20:45:29,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641725946] [2019-12-26 20:45:29,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:45:29,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:29,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:45:29,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:45:29,045 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 10 states. [2019-12-26 20:45:29,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:29,228 INFO L93 Difference]: Finished difference Result 90 states and 186 transitions. [2019-12-26 20:45:29,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:29,228 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-26 20:45:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:29,229 INFO L225 Difference]: With dead ends: 90 [2019-12-26 20:45:29,230 INFO L226 Difference]: Without dead ends: 89 [2019-12-26 20:45:29,230 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:29,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-26 20:45:29,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2019-12-26 20:45:29,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-26 20:45:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-26 20:45:29,234 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-26 20:45:29,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:29,234 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-26 20:45:29,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:45:29,234 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-26 20:45:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:45:29,235 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:29,235 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:29,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:29,439 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:29,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:29,439 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-26 20:45:29,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:29,440 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628834477] [2019-12-26 20:45:29,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:29,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628834477] [2019-12-26 20:45:29,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773947680] [2019-12-26 20:45:29,508 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 [2019-12-26 20:45:29,550 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:29,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:29,551 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:29,552 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:29,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:29,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:29,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695420560] [2019-12-26 20:45:29,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:29,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:29,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:29,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:29,613 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 12 states. [2019-12-26 20:45:29,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:29,721 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-26 20:45:29,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:45:29,722 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-26 20:45:29,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:29,723 INFO L225 Difference]: With dead ends: 92 [2019-12-26 20:45:29,723 INFO L226 Difference]: Without dead ends: 91 [2019-12-26 20:45:29,724 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 [2019-12-26 20:45:29,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-26 20:45:29,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-26 20:45:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-26 20:45:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-26 20:45:29,728 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-26 20:45:29,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:29,729 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-26 20:45:29,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:29,729 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-26 20:45:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:29,730 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:29,730 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:29,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:29,933 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:29,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-26 20:45:29,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:29,934 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295096008] [2019-12-26 20:45:29,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:30,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295096008] [2019-12-26 20:45:30,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390761285] [2019-12-26 20:45:30,005 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 [2019-12-26 20:45:30,057 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:45:30,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:30,058 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:30,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:30,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:30,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:30,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938634370] [2019-12-26 20:45:30,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:30,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:30,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:30,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:30,157 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-26 20:45:30,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:30,185 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-26 20:45:30,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:30,185 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-26 20:45:30,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:30,186 INFO L225 Difference]: With dead ends: 95 [2019-12-26 20:45:30,186 INFO L226 Difference]: Without dead ends: 94 [2019-12-26 20:45:30,186 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 [2019-12-26 20:45:30,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-26 20:45:30,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-26 20:45:30,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-26 20:45:30,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-26 20:45:30,189 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-26 20:45:30,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:30,190 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-26 20:45:30,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:30,190 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-26 20:45:30,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:30,190 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:30,191 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:30,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:30,394 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:30,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:30,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 9 times [2019-12-26 20:45:30,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:30,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758456929] [2019-12-26 20:45:30,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:30,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758456929] [2019-12-26 20:45:30,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661302743] [2019-12-26 20:45:30,455 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:45:30,525 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:30,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:30,526 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:30,530 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:30,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:30,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:30,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659604335] [2019-12-26 20:45:30,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:30,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:30,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:30,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:30,605 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-26 20:45:30,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:30,717 INFO L93 Difference]: Finished difference Result 98 states and 211 transitions. [2019-12-26 20:45:30,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:45:30,718 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:30,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:30,719 INFO L225 Difference]: With dead ends: 98 [2019-12-26 20:45:30,719 INFO L226 Difference]: Without dead ends: 97 [2019-12-26 20:45:30,719 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 [2019-12-26 20:45:30,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-26 20:45:30,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2019-12-26 20:45:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-26 20:45:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-26 20:45:30,723 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-26 20:45:30,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:30,723 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-26 20:45:30,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:30,723 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-26 20:45:30,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:30,724 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:30,724 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:30,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:30,927 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:30,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:30,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 10 times [2019-12-26 20:45:30,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:30,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112895058] [2019-12-26 20:45:30,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:30,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112895058] [2019-12-26 20:45:30,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785709042] [2019-12-26 20:45:30,984 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 [2019-12-26 20:45:31,037 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:31,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:31,038 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:31,039 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:31,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:31,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:31,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036711019] [2019-12-26 20:45:31,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:31,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:31,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:31,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:31,131 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-26 20:45:31,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:31,241 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-26 20:45:31,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:45:31,242 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:31,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:31,243 INFO L225 Difference]: With dead ends: 101 [2019-12-26 20:45:31,243 INFO L226 Difference]: Without dead ends: 100 [2019-12-26 20:45:31,243 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 [2019-12-26 20:45:31,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-26 20:45:31,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-26 20:45:31,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-26 20:45:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-26 20:45:31,247 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-26 20:45:31,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:31,247 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-26 20:45:31,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:31,247 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-26 20:45:31,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:31,248 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:31,248 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:31,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:31,452 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:31,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:31,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 11 times [2019-12-26 20:45:31,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:31,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162430778] [2019-12-26 20:45:31,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:31,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162430778] [2019-12-26 20:45:31,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360974076] [2019-12-26 20:45:31,510 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 [2019-12-26 20:45:31,552 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:31,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:31,553 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:31,554 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:31,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:31,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:31,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156212870] [2019-12-26 20:45:31,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:31,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:31,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:31,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:31,659 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-26 20:45:31,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:31,818 INFO L93 Difference]: Finished difference Result 105 states and 221 transitions. [2019-12-26 20:45:31,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:45:31,818 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:31,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:31,819 INFO L225 Difference]: With dead ends: 105 [2019-12-26 20:45:31,820 INFO L226 Difference]: Without dead ends: 104 [2019-12-26 20:45:31,820 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 [2019-12-26 20:45:31,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-26 20:45:31,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2019-12-26 20:45:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-26 20:45:31,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-26 20:45:31,824 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-26 20:45:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:31,825 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-26 20:45:31,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-26 20:45:31,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:31,825 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:31,826 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:32,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:32,029 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:32,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:32,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555059, now seen corresponding path program 12 times [2019-12-26 20:45:32,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:32,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507413669] [2019-12-26 20:45:32,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:32,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507413669] [2019-12-26 20:45:32,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393385904] [2019-12-26 20:45:32,092 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 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 [2019-12-26 20:45:32,140 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:45:32,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:32,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:32,142 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:32,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:32,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:32,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795571140] [2019-12-26 20:45:32,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:32,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:32,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:32,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:32,200 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-26 20:45:32,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:32,297 INFO L93 Difference]: Finished difference Result 103 states and 216 transitions. [2019-12-26 20:45:32,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:45:32,298 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:32,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:32,299 INFO L225 Difference]: With dead ends: 103 [2019-12-26 20:45:32,299 INFO L226 Difference]: Without dead ends: 102 [2019-12-26 20:45:32,299 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 [2019-12-26 20:45:32,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-26 20:45:32,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2019-12-26 20:45:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-26 20:45:32,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-26 20:45:32,303 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-26 20:45:32,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:32,304 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-26 20:45:32,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:32,304 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-26 20:45:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:32,305 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:32,305 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:32,508 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:32,508 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:32,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:32,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 13 times [2019-12-26 20:45:32,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:32,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428676548] [2019-12-26 20:45:32,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:32,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428676548] [2019-12-26 20:45:32,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429344434] [2019-12-26 20:45:32,605 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 [2019-12-26 20:45:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:32,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:32,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:32,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:32,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:32,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041560173] [2019-12-26 20:45:32,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:32,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:32,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:32,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:32,766 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-26 20:45:32,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:32,951 INFO L93 Difference]: Finished difference Result 110 states and 232 transitions. [2019-12-26 20:45:32,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:32,952 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:32,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:32,953 INFO L225 Difference]: With dead ends: 110 [2019-12-26 20:45:32,954 INFO L226 Difference]: Without dead ends: 109 [2019-12-26 20:45:32,954 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 [2019-12-26 20:45:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-26 20:45:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2019-12-26 20:45:32,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-26 20:45:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-26 20:45:32,960 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-26 20:45:32,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:32,960 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-26 20:45:32,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-26 20:45:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:32,961 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:32,962 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:33,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:33,173 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:33,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 14 times [2019-12-26 20:45:33,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:33,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737224439] [2019-12-26 20:45:33,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:33,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737224439] [2019-12-26 20:45:33,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921600523] [2019-12-26 20:45:33,234 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 [2019-12-26 20:45:33,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:33,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:33,274 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:33,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:33,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:33,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:33,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77745944] [2019-12-26 20:45:33,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:33,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:33,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:33,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:33,344 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-26 20:45:33,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:33,477 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-26 20:45:33,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:45:33,478 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:33,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:33,479 INFO L225 Difference]: With dead ends: 112 [2019-12-26 20:45:33,479 INFO L226 Difference]: Without dead ends: 111 [2019-12-26 20:45:33,479 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 [2019-12-26 20:45:33,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-26 20:45:33,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2019-12-26 20:45:33,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-26 20:45:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-26 20:45:33,482 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-26 20:45:33,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:33,483 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-26 20:45:33,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:33,483 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-26 20:45:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:33,483 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:33,484 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:33,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:33,687 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:33,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:33,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 15 times [2019-12-26 20:45:33,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:33,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118728795] [2019-12-26 20:45:33,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:33,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118728795] [2019-12-26 20:45:33,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949916517] [2019-12-26 20:45:33,776 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 [2019-12-26 20:45:33,821 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:33,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:33,822 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:33,823 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:33,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:33,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:33,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485102202] [2019-12-26 20:45:33,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:33,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:33,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:33,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:33,894 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-26 20:45:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:34,028 INFO L93 Difference]: Finished difference Result 106 states and 225 transitions. [2019-12-26 20:45:34,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:34,029 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:34,029 INFO L225 Difference]: With dead ends: 106 [2019-12-26 20:45:34,030 INFO L226 Difference]: Without dead ends: 105 [2019-12-26 20:45:34,030 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:45:34,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-26 20:45:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2019-12-26 20:45:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-26 20:45:34,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-26 20:45:34,032 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-26 20:45:34,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:34,033 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-26 20:45:34,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:34,033 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-26 20:45:34,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:34,033 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:34,033 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:34,234 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:34,234 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:34,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1435231979, now seen corresponding path program 16 times [2019-12-26 20:45:34,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:34,235 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426050451] [2019-12-26 20:45:34,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:34,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426050451] [2019-12-26 20:45:34,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615438060] [2019-12-26 20:45:34,289 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:45:34,326 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:34,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:34,326 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:34,327 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:34,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:34,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:34,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036223562] [2019-12-26 20:45:34,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:34,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:34,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:34,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:34,389 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-26 20:45:34,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:34,546 INFO L93 Difference]: Finished difference Result 112 states and 234 transitions. [2019-12-26 20:45:34,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:45:34,546 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:34,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:34,547 INFO L225 Difference]: With dead ends: 112 [2019-12-26 20:45:34,548 INFO L226 Difference]: Without dead ends: 111 [2019-12-26 20:45:34,548 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:45:34,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-26 20:45:34,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2019-12-26 20:45:34,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-26 20:45:34,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-26 20:45:34,553 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-26 20:45:34,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:34,553 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-26 20:45:34,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:34,554 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-26 20:45:34,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:34,554 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:34,554 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:34,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:34,758 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:34,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:34,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236629, now seen corresponding path program 17 times [2019-12-26 20:45:34,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:34,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161066845] [2019-12-26 20:45:34,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:34,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161066845] [2019-12-26 20:45:34,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831310827] [2019-12-26 20:45:34,813 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 [2019-12-26 20:45:34,855 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:34,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:34,856 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:34,857 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:34,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:34,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:34,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315899331] [2019-12-26 20:45:34,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:34,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:34,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:34,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:34,941 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-26 20:45:35,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:35,131 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-26 20:45:35,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:35,132 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:35,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:35,133 INFO L225 Difference]: With dead ends: 115 [2019-12-26 20:45:35,133 INFO L226 Difference]: Without dead ends: 114 [2019-12-26 20:45:35,134 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 [2019-12-26 20:45:35,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-26 20:45:35,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2019-12-26 20:45:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-26 20:45:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-26 20:45:35,138 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-26 20:45:35,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:35,138 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-26 20:45:35,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-26 20:45:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:35,139 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:35,139 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:35,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:35,342 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:35,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:35,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236784, now seen corresponding path program 18 times [2019-12-26 20:45:35,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:35,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583316661] [2019-12-26 20:45:35,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:35,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583316661] [2019-12-26 20:45:35,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557344813] [2019-12-26 20:45:35,404 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 [2019-12-26 20:45:35,443 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:45:35,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:35,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:35,444 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:35,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:35,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:35,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769847213] [2019-12-26 20:45:35,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:35,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:35,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:35,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:35,521 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-26 20:45:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:35,695 INFO L93 Difference]: Finished difference Result 111 states and 231 transitions. [2019-12-26 20:45:35,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:35,696 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:35,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:35,697 INFO L225 Difference]: With dead ends: 111 [2019-12-26 20:45:35,697 INFO L226 Difference]: Without dead ends: 109 [2019-12-26 20:45:35,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:45:35,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-26 20:45:35,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2019-12-26 20:45:35,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-26 20:45:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-26 20:45:35,700 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-26 20:45:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:35,701 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-26 20:45:35,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-26 20:45:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:35,701 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:35,701 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:35,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:35,905 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:35,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:35,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380779, now seen corresponding path program 19 times [2019-12-26 20:45:35,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:35,905 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080158711] [2019-12-26 20:45:35,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:35,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080158711] [2019-12-26 20:45:35,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021359975] [2019-12-26 20:45:35,963 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 [2019-12-26 20:45:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:36,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:36,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:36,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:36,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:36,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823295321] [2019-12-26 20:45:36,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:36,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:36,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:36,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:36,069 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 12 states. [2019-12-26 20:45:36,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:36,250 INFO L93 Difference]: Finished difference Result 109 states and 228 transitions. [2019-12-26 20:45:36,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:45:36,251 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:36,252 INFO L225 Difference]: With dead ends: 109 [2019-12-26 20:45:36,252 INFO L226 Difference]: Without dead ends: 108 [2019-12-26 20:45:36,252 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 [2019-12-26 20:45:36,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-26 20:45:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2019-12-26 20:45:36,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-26 20:45:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 194 transitions. [2019-12-26 20:45:36,255 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 194 transitions. Word has length 11 [2019-12-26 20:45:36,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:36,255 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 194 transitions. [2019-12-26 20:45:36,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:36,256 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 194 transitions. [2019-12-26 20:45:36,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:36,256 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:36,256 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:36,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:36,457 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:36,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 20 times [2019-12-26 20:45:36,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:36,458 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831210926] [2019-12-26 20:45:36,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:36,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831210926] [2019-12-26 20:45:36,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030272538] [2019-12-26 20:45:36,521 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 [2019-12-26 20:45:36,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:36,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:36,570 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:36,577 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:36,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:36,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:36,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935748647] [2019-12-26 20:45:36,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:36,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:36,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:36,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:36,665 INFO L87 Difference]: Start difference. First operand 88 states and 194 transitions. Second operand 12 states. [2019-12-26 20:45:36,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:36,826 INFO L93 Difference]: Finished difference Result 110 states and 229 transitions. [2019-12-26 20:45:36,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:45:36,827 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:36,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:36,828 INFO L225 Difference]: With dead ends: 110 [2019-12-26 20:45:36,828 INFO L226 Difference]: Without dead ends: 109 [2019-12-26 20:45:36,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2019-12-26 20:45:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-26 20:45:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2019-12-26 20:45:36,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-26 20:45:36,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 190 transitions. [2019-12-26 20:45:36,833 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 190 transitions. Word has length 11 [2019-12-26 20:45:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:36,833 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 190 transitions. [2019-12-26 20:45:36,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 190 transitions. [2019-12-26 20:45:36,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:36,833 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:36,834 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:37,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:37,037 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:37,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:37,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385584, now seen corresponding path program 21 times [2019-12-26 20:45:37,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:37,038 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020286157] [2019-12-26 20:45:37,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:37,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020286157] [2019-12-26 20:45:37,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515225354] [2019-12-26 20:45:37,091 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 [2019-12-26 20:45:37,135 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:45:37,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:37,136 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:45:37,137 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:37,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:37,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-26 20:45:37,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652260392] [2019-12-26 20:45:37,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:45:37,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:37,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:45:37,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:45:37,197 INFO L87 Difference]: Start difference. First operand 87 states and 190 transitions. Second operand 12 states. [2019-12-26 20:45:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:37,394 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2019-12-26 20:45:37,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:45:37,394 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-26 20:45:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:37,395 INFO L225 Difference]: With dead ends: 115 [2019-12-26 20:45:37,396 INFO L226 Difference]: Without dead ends: 114 [2019-12-26 20:45:37,396 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:45:37,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-26 20:45:37,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2019-12-26 20:45:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-26 20:45:37,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-26 20:45:37,400 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-26 20:45:37,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:37,401 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-26 20:45:37,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:45:37,401 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-26 20:45:37,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:45:37,401 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:37,401 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:37,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:37,605 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:37,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-26 20:45:37,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:37,606 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307130136] [2019-12-26 20:45:37,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:37,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307130136] [2019-12-26 20:45:37,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919242407] [2019-12-26 20:45:37,686 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 [2019-12-26 20:45:37,730 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:45:37,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:37,731 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:37,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:37,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:37,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:37,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727160846] [2019-12-26 20:45:37,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:37,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:37,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:37,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:37,789 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 14 states. [2019-12-26 20:45:37,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:37,903 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-26 20:45:37,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:37,904 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-26 20:45:37,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:37,905 INFO L225 Difference]: With dead ends: 107 [2019-12-26 20:45:37,905 INFO L226 Difference]: Without dead ends: 106 [2019-12-26 20:45:37,905 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-12-26 20:45:37,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-26 20:45:37,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-26 20:45:37,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-26 20:45:37,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-26 20:45:37,910 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-26 20:45:37,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:37,910 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-26 20:45:37,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:37,910 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-26 20:45:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:37,911 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:37,911 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:38,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:38,114 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:38,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:38,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-26 20:45:38,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:38,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698951762] [2019-12-26 20:45:38,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:38,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698951762] [2019-12-26 20:45:38,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789024070] [2019-12-26 20:45:38,187 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 [2019-12-26 20:45:38,238 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:45:38,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:38,239 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:45:38,240 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:38,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:38,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:45:38,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150908530] [2019-12-26 20:45:38,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:45:38,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:38,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:45:38,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:38,386 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 16 states. [2019-12-26 20:45:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:38,421 INFO L93 Difference]: Finished difference Result 110 states and 234 transitions. [2019-12-26 20:45:38,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:45:38,422 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-26 20:45:38,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:38,422 INFO L225 Difference]: With dead ends: 110 [2019-12-26 20:45:38,423 INFO L226 Difference]: Without dead ends: 109 [2019-12-26 20:45:38,423 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:45:38,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-26 20:45:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2019-12-26 20:45:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-26 20:45:38,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-26 20:45:38,427 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-26 20:45:38,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:38,428 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-26 20:45:38,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:45:38,428 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-26 20:45:38,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:38,428 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:38,429 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:38,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:38,629 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:38,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 22 times [2019-12-26 20:45:38,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:38,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887590232] [2019-12-26 20:45:38,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:38,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887590232] [2019-12-26 20:45:38,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785515538] [2019-12-26 20:45:38,717 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 [2019-12-26 20:45:38,758 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:38,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:38,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:38,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:38,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:38,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:38,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805788552] [2019-12-26 20:45:38,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:38,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:38,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:38,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:38,838 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-26 20:45:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:38,974 INFO L93 Difference]: Finished difference Result 116 states and 249 transitions. [2019-12-26 20:45:38,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:38,975 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:38,976 INFO L225 Difference]: With dead ends: 116 [2019-12-26 20:45:38,976 INFO L226 Difference]: Without dead ends: 115 [2019-12-26 20:45:38,977 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2019-12-26 20:45:38,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-26 20:45:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2019-12-26 20:45:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-26 20:45:38,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-26 20:45:38,981 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-26 20:45:38,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:38,981 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-26 20:45:38,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:38,981 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-26 20:45:38,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:38,982 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:38,982 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:39,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:39,185 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:39,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:39,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 23 times [2019-12-26 20:45:39,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:39,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155010863] [2019-12-26 20:45:39,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:39,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155010863] [2019-12-26 20:45:39,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806618434] [2019-12-26 20:45:39,251 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 [2019-12-26 20:45:39,317 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:39,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:39,318 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:39,319 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:39,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:39,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:39,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007738947] [2019-12-26 20:45:39,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:39,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:39,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:39,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:39,405 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-26 20:45:39,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:39,542 INFO L93 Difference]: Finished difference Result 121 states and 260 transitions. [2019-12-26 20:45:39,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:39,543 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:39,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:39,544 INFO L225 Difference]: With dead ends: 121 [2019-12-26 20:45:39,544 INFO L226 Difference]: Without dead ends: 120 [2019-12-26 20:45:39,544 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 [2019-12-26 20:45:39,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-26 20:45:39,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2019-12-26 20:45:39,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-26 20:45:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-26 20:45:39,549 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-26 20:45:39,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:39,549 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-26 20:45:39,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-26 20:45:39,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:39,550 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:39,550 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:39,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:39,753 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:39,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:39,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 24 times [2019-12-26 20:45:39,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:39,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529159400] [2019-12-26 20:45:39,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:39,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529159400] [2019-12-26 20:45:39,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278915200] [2019-12-26 20:45:39,817 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 [2019-12-26 20:45:39,872 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:45:39,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:39,873 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:39,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:41,452 WARN L192 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-26 20:45:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:41,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:41,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:41,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094623251] [2019-12-26 20:45:41,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:41,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:41,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:41,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=114, Unknown=1, NotChecked=0, Total=182 [2019-12-26 20:45:41,455 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-26 20:45:42,000 WARN L192 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-26 20:45:42,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:42,020 INFO L93 Difference]: Finished difference Result 126 states and 265 transitions. [2019-12-26 20:45:42,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:45:42,020 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:42,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:42,022 INFO L225 Difference]: With dead ends: 126 [2019-12-26 20:45:42,022 INFO L226 Difference]: Without dead ends: 125 [2019-12-26 20:45:42,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=144, Invalid=235, Unknown=1, NotChecked=0, Total=380 [2019-12-26 20:45:42,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-12-26 20:45:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2019-12-26 20:45:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-26 20:45:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-26 20:45:42,026 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-26 20:45:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:42,027 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-26 20:45:42,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-26 20:45:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:42,027 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:42,027 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:42,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:42,231 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:42,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 25 times [2019-12-26 20:45:42,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:42,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615532184] [2019-12-26 20:45:42,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:42,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615532184] [2019-12-26 20:45:42,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003702836] [2019-12-26 20:45:42,288 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 [2019-12-26 20:45:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:42,331 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:42,332 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:42,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:42,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:42,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425928131] [2019-12-26 20:45:42,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:42,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:42,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:42,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:42,416 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-26 20:45:42,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:42,557 INFO L93 Difference]: Finished difference Result 122 states and 261 transitions. [2019-12-26 20:45:42,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:42,558 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:42,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:42,559 INFO L225 Difference]: With dead ends: 122 [2019-12-26 20:45:42,559 INFO L226 Difference]: Without dead ends: 121 [2019-12-26 20:45:42,559 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 [2019-12-26 20:45:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-26 20:45:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2019-12-26 20:45:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-26 20:45:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-26 20:45:42,565 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-26 20:45:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:42,565 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-26 20:45:42,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-26 20:45:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:42,566 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:42,566 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:42,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:42,770 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:42,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:42,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 26 times [2019-12-26 20:45:42,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:42,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620456552] [2019-12-26 20:45:42,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:42,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620456552] [2019-12-26 20:45:42,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297642675] [2019-12-26 20:45:42,846 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 [2019-12-26 20:45:42,890 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:42,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:42,891 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:42,892 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:42,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:42,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:42,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435813870] [2019-12-26 20:45:42,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:42,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:42,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:42,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:42,991 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-26 20:45:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:43,180 INFO L93 Difference]: Finished difference Result 131 states and 279 transitions. [2019-12-26 20:45:43,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:45:43,181 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:43,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:43,182 INFO L225 Difference]: With dead ends: 131 [2019-12-26 20:45:43,182 INFO L226 Difference]: Without dead ends: 130 [2019-12-26 20:45:43,183 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 [2019-12-26 20:45:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-26 20:45:43,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 97. [2019-12-26 20:45:43,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-26 20:45:43,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 220 transitions. [2019-12-26 20:45:43,187 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 220 transitions. Word has length 12 [2019-12-26 20:45:43,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:43,187 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 220 transitions. [2019-12-26 20:45:43,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:43,187 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 220 transitions. [2019-12-26 20:45:43,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:43,188 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:43,188 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:43,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:43,392 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:43,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:43,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 27 times [2019-12-26 20:45:43,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:43,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115914310] [2019-12-26 20:45:43,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:43,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115914310] [2019-12-26 20:45:43,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409375950] [2019-12-26 20:45:43,457 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 [2019-12-26 20:45:43,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:43,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:43,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:43,504 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:43,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:43,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:43,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046856020] [2019-12-26 20:45:43,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:43,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:43,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:43,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:43,661 INFO L87 Difference]: Start difference. First operand 97 states and 220 transitions. Second operand 14 states. [2019-12-26 20:45:43,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:43,963 INFO L93 Difference]: Finished difference Result 133 states and 281 transitions. [2019-12-26 20:45:43,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:43,963 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:43,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:43,965 INFO L225 Difference]: With dead ends: 133 [2019-12-26 20:45:43,965 INFO L226 Difference]: Without dead ends: 132 [2019-12-26 20:45:43,965 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2019-12-26 20:45:43,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-26 20:45:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 97. [2019-12-26 20:45:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-26 20:45:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 220 transitions. [2019-12-26 20:45:43,970 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 220 transitions. Word has length 12 [2019-12-26 20:45:43,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:43,971 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 220 transitions. [2019-12-26 20:45:43,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:43,971 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 220 transitions. [2019-12-26 20:45:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:43,971 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:43,972 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:44,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:44,176 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:44,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:44,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 28 times [2019-12-26 20:45:44,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:44,177 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342881465] [2019-12-26 20:45:44,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:44,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342881465] [2019-12-26 20:45:44,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118813669] [2019-12-26 20:45:44,255 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 [2019-12-26 20:45:44,300 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:44,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:44,301 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:44,301 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:44,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:44,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:44,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521440259] [2019-12-26 20:45:44,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:44,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:44,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:44,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:44,440 INFO L87 Difference]: Start difference. First operand 97 states and 220 transitions. Second operand 14 states. [2019-12-26 20:45:44,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:44,728 INFO L93 Difference]: Finished difference Result 128 states and 270 transitions. [2019-12-26 20:45:44,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:45:44,728 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:44,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:44,729 INFO L225 Difference]: With dead ends: 128 [2019-12-26 20:45:44,729 INFO L226 Difference]: Without dead ends: 127 [2019-12-26 20:45:44,730 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2019-12-26 20:45:44,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-12-26 20:45:44,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2019-12-26 20:45:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-26 20:45:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-26 20:45:44,734 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-26 20:45:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:44,734 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-26 20:45:44,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:44,734 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-26 20:45:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:44,735 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:44,735 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:44,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:44,938 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:44,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:44,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1750434070, now seen corresponding path program 29 times [2019-12-26 20:45:44,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:44,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861463069] [2019-12-26 20:45:44,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:44,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861463069] [2019-12-26 20:45:44,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703635551] [2019-12-26 20:45:44,996 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 [2019-12-26 20:45:45,040 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:45:45,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:45,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:45,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:45,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:45,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:45,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272197703] [2019-12-26 20:45:45,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:45,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:45,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:45,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:45,103 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-26 20:45:45,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:45,221 INFO L93 Difference]: Finished difference Result 121 states and 254 transitions. [2019-12-26 20:45:45,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:45:45,222 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:45,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:45,223 INFO L225 Difference]: With dead ends: 121 [2019-12-26 20:45:45,223 INFO L226 Difference]: Without dead ends: 120 [2019-12-26 20:45:45,224 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 [2019-12-26 20:45:45,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-26 20:45:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2019-12-26 20:45:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-26 20:45:45,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-26 20:45:45,228 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-26 20:45:45,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:45,228 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-26 20:45:45,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-26 20:45:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:45,229 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:45,229 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:45,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:45,432 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:45,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:45,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1750433915, now seen corresponding path program 30 times [2019-12-26 20:45:45,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:45,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994447140] [2019-12-26 20:45:45,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:45,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994447140] [2019-12-26 20:45:45,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000715841] [2019-12-26 20:45:45,489 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 [2019-12-26 20:45:45,539 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:45:45,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:45,540 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:45,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:45,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:45,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:45,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855560876] [2019-12-26 20:45:45,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:45,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:45,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:45,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:45,617 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 14 states. [2019-12-26 20:45:45,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:45,816 INFO L93 Difference]: Finished difference Result 136 states and 287 transitions. [2019-12-26 20:45:45,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:45,818 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:45,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:45,819 INFO L225 Difference]: With dead ends: 136 [2019-12-26 20:45:45,819 INFO L226 Difference]: Without dead ends: 135 [2019-12-26 20:45:45,819 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 [2019-12-26 20:45:45,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-12-26 20:45:45,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 99. [2019-12-26 20:45:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-26 20:45:45,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-26 20:45:45,823 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-26 20:45:45,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:45,823 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-26 20:45:45,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:45,823 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-26 20:45:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:45,824 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:45,824 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:46,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:46,028 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:46,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:46,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 31 times [2019-12-26 20:45:46,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:46,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108552716] [2019-12-26 20:45:46,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:46,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:46,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108552716] [2019-12-26 20:45:46,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039500398] [2019-12-26 20:45:46,084 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 [2019-12-26 20:45:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:46,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:46,129 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:46,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:46,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:46,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486772143] [2019-12-26 20:45:46,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:46,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:46,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:46,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:46,203 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-26 20:45:46,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:46,595 INFO L93 Difference]: Finished difference Result 147 states and 307 transitions. [2019-12-26 20:45:46,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:46,595 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:46,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:46,597 INFO L225 Difference]: With dead ends: 147 [2019-12-26 20:45:46,597 INFO L226 Difference]: Without dead ends: 146 [2019-12-26 20:45:46,597 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:46,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-26 20:45:46,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 99. [2019-12-26 20:45:46,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-26 20:45:46,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-26 20:45:46,602 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-26 20:45:46,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:46,604 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-26 20:45:46,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:46,604 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-26 20:45:46,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:46,604 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:46,605 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:46,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:46,808 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:46,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 32 times [2019-12-26 20:45:46,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:46,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329757512] [2019-12-26 20:45:46,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:46,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329757512] [2019-12-26 20:45:46,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860442873] [2019-12-26 20:45:46,879 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 [2019-12-26 20:45:46,918 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:46,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:46,919 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:46,919 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:46,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:46,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:46,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132493896] [2019-12-26 20:45:46,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:46,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:46,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:46,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:46,993 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-26 20:45:47,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:47,274 INFO L93 Difference]: Finished difference Result 145 states and 306 transitions. [2019-12-26 20:45:47,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:47,275 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:47,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:47,276 INFO L225 Difference]: With dead ends: 145 [2019-12-26 20:45:47,276 INFO L226 Difference]: Without dead ends: 143 [2019-12-26 20:45:47,277 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 [2019-12-26 20:45:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-26 20:45:47,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2019-12-26 20:45:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-26 20:45:47,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-26 20:45:47,281 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-26 20:45:47,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:47,281 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-26 20:45:47,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:47,281 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-26 20:45:47,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:47,281 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:47,282 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:47,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:47,482 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:47,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 33 times [2019-12-26 20:45:47,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:47,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485816393] [2019-12-26 20:45:47,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:47,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485816393] [2019-12-26 20:45:47,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025931645] [2019-12-26 20:45:47,543 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 [2019-12-26 20:45:47,599 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:47,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:47,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:47,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:47,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:47,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:47,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583132375] [2019-12-26 20:45:47,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:47,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:47,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:47,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:47,711 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-26 20:45:47,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:47,907 INFO L93 Difference]: Finished difference Result 136 states and 287 transitions. [2019-12-26 20:45:47,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:47,907 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:47,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:47,908 INFO L225 Difference]: With dead ends: 136 [2019-12-26 20:45:47,908 INFO L226 Difference]: Without dead ends: 135 [2019-12-26 20:45:47,909 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 [2019-12-26 20:45:47,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-12-26 20:45:47,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 99. [2019-12-26 20:45:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-26 20:45:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-26 20:45:47,911 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-26 20:45:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:47,911 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-26 20:45:47,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:47,911 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-26 20:45:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:47,912 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:47,912 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:48,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:48,112 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:48,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:48,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 34 times [2019-12-26 20:45:48,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:48,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760495791] [2019-12-26 20:45:48,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:48,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760495791] [2019-12-26 20:45:48,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549413956] [2019-12-26 20:45:48,181 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 [2019-12-26 20:45:48,227 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:48,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:48,228 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:48,229 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:48,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:48,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:48,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164125865] [2019-12-26 20:45:48,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:48,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:48,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:48,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:48,301 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-26 20:45:48,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:48,503 INFO L93 Difference]: Finished difference Result 132 states and 283 transitions. [2019-12-26 20:45:48,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:48,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:48,504 INFO L225 Difference]: With dead ends: 132 [2019-12-26 20:45:48,505 INFO L226 Difference]: Without dead ends: 131 [2019-12-26 20:45:48,505 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 [2019-12-26 20:45:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-26 20:45:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 99. [2019-12-26 20:45:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-26 20:45:48,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-26 20:45:48,509 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-26 20:45:48,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:48,509 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-26 20:45:48,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:48,509 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-26 20:45:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:48,510 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:48,510 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:48,713 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:48,713 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:48,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:48,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 35 times [2019-12-26 20:45:48,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:48,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259698275] [2019-12-26 20:45:48,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:48,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259698275] [2019-12-26 20:45:48,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465837568] [2019-12-26 20:45:48,780 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 [2019-12-26 20:45:48,834 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:48,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:48,835 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:48,836 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:48,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:48,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:48,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034027448] [2019-12-26 20:45:48,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:48,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:48,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:48,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:48,963 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-26 20:45:49,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:49,160 INFO L93 Difference]: Finished difference Result 131 states and 282 transitions. [2019-12-26 20:45:49,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:45:49,162 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:49,163 INFO L225 Difference]: With dead ends: 131 [2019-12-26 20:45:49,163 INFO L226 Difference]: Without dead ends: 130 [2019-12-26 20:45:49,163 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:45:49,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-26 20:45:49,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2019-12-26 20:45:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-26 20:45:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-26 20:45:49,166 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-26 20:45:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:49,167 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-26 20:45:49,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-26 20:45:49,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:49,167 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:49,168 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:49,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:49,372 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:49,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:49,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1542513096, now seen corresponding path program 36 times [2019-12-26 20:45:49,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:49,372 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562085808] [2019-12-26 20:45:49,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:49,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562085808] [2019-12-26 20:45:49,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636233388] [2019-12-26 20:45:49,439 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 [2019-12-26 20:45:49,490 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:45:49,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:49,491 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:45:49,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:49,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:49,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:49,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102409523] [2019-12-26 20:45:49,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:49,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:49,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:49,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:49,579 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-26 20:45:49,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:49,688 INFO L93 Difference]: Finished difference Result 129 states and 271 transitions. [2019-12-26 20:45:49,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:45:49,688 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:49,690 INFO L225 Difference]: With dead ends: 129 [2019-12-26 20:45:49,690 INFO L226 Difference]: Without dead ends: 128 [2019-12-26 20:45:49,690 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:45:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-26 20:45:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 97. [2019-12-26 20:45:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-26 20:45:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-26 20:45:49,696 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-26 20:45:49,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:49,696 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-26 20:45:49,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:49,696 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-26 20:45:49,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:49,697 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:49,697 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:49,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:49,900 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:49,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:49,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517746, now seen corresponding path program 37 times [2019-12-26 20:45:49,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:49,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480402344] [2019-12-26 20:45:49,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:49,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480402344] [2019-12-26 20:45:49,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830359958] [2019-12-26 20:45:49,957 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 [2019-12-26 20:45:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:50,029 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:50,030 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:50,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:50,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:50,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217324308] [2019-12-26 20:45:50,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:50,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:50,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:50,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:50,111 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 14 states. [2019-12-26 20:45:51,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:51,619 INFO L93 Difference]: Finished difference Result 144 states and 298 transitions. [2019-12-26 20:45:51,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:51,620 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:51,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:51,621 INFO L225 Difference]: With dead ends: 144 [2019-12-26 20:45:51,621 INFO L226 Difference]: Without dead ends: 143 [2019-12-26 20:45:51,621 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=303, Unknown=2, NotChecked=0, Total=462 [2019-12-26 20:45:51,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-26 20:45:51,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2019-12-26 20:45:51,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-26 20:45:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-26 20:45:51,625 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-26 20:45:51,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:51,625 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-26 20:45:51,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:51,626 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-26 20:45:51,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:51,626 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:51,626 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:51,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:51,829 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:51,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:51,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517901, now seen corresponding path program 38 times [2019-12-26 20:45:51,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:51,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992415614] [2019-12-26 20:45:51,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:51,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992415614] [2019-12-26 20:45:51,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773267452] [2019-12-26 20:45:51,891 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 [2019-12-26 20:45:51,931 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:51,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:51,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:51,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:52,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:52,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:52,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931883438] [2019-12-26 20:45:52,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:52,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:52,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:52,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:52,010 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-26 20:45:52,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:52,280 INFO L93 Difference]: Finished difference Result 136 states and 284 transitions. [2019-12-26 20:45:52,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:52,280 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:52,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:52,281 INFO L225 Difference]: With dead ends: 136 [2019-12-26 20:45:52,281 INFO L226 Difference]: Without dead ends: 135 [2019-12-26 20:45:52,281 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 [2019-12-26 20:45:52,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-12-26 20:45:52,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 96. [2019-12-26 20:45:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-26 20:45:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 213 transitions. [2019-12-26 20:45:52,284 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 213 transitions. Word has length 12 [2019-12-26 20:45:52,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:52,285 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 213 transitions. [2019-12-26 20:45:52,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:52,285 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 213 transitions. [2019-12-26 20:45:52,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:52,285 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:52,286 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:52,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:52,492 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:52,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:52,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1542661896, now seen corresponding path program 39 times [2019-12-26 20:45:52,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:52,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431405512] [2019-12-26 20:45:52,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:52,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431405512] [2019-12-26 20:45:52,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908286131] [2019-12-26 20:45:52,567 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 [2019-12-26 20:45:52,612 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:45:52,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:52,613 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:52,613 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:52,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:52,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:52,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865459985] [2019-12-26 20:45:52,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:52,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:52,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:52,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:52,743 INFO L87 Difference]: Start difference. First operand 96 states and 213 transitions. Second operand 14 states. [2019-12-26 20:45:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:53,204 INFO L93 Difference]: Finished difference Result 142 states and 296 transitions. [2019-12-26 20:45:53,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:45:53,204 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:53,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:53,207 INFO L225 Difference]: With dead ends: 142 [2019-12-26 20:45:53,207 INFO L226 Difference]: Without dead ends: 141 [2019-12-26 20:45:53,208 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:45:53,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-26 20:45:53,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2019-12-26 20:45:53,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-26 20:45:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-26 20:45:53,213 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-26 20:45:53,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:53,213 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-26 20:45:53,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:53,213 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-26 20:45:53,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:53,214 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:53,214 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:53,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:53,418 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:53,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:53,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1542662051, now seen corresponding path program 40 times [2019-12-26 20:45:53,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:53,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619368903] [2019-12-26 20:45:53,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:53,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619368903] [2019-12-26 20:45:53,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147683174] [2019-12-26 20:45:53,485 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 [2019-12-26 20:45:53,530 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:53,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:53,531 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:53,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:53,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:53,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:53,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32694102] [2019-12-26 20:45:53,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:53,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:53,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:53,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:53,644 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-26 20:45:53,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:53,987 INFO L93 Difference]: Finished difference Result 153 states and 317 transitions. [2019-12-26 20:45:53,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:45:53,987 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:53,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:53,989 INFO L225 Difference]: With dead ends: 153 [2019-12-26 20:45:53,989 INFO L226 Difference]: Without dead ends: 151 [2019-12-26 20:45:53,989 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:45:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-26 20:45:53,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 97. [2019-12-26 20:45:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-26 20:45:53,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-26 20:45:53,994 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-26 20:45:53,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:53,994 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-26 20:45:53,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:53,994 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-26 20:45:53,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:53,995 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:53,995 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:54,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:54,198 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:54,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666701, now seen corresponding path program 41 times [2019-12-26 20:45:54,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:54,199 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855398390] [2019-12-26 20:45:54,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:54,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855398390] [2019-12-26 20:45:54,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897395086] [2019-12-26 20:45:54,255 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 [2019-12-26 20:45:54,298 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:45:54,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:54,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:54,300 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:54,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:54,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:54,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668214810] [2019-12-26 20:45:54,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:54,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:54,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:54,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:54,375 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 14 states. [2019-12-26 20:45:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:55,126 INFO L93 Difference]: Finished difference Result 156 states and 323 transitions. [2019-12-26 20:45:55,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:45:55,126 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:55,128 INFO L225 Difference]: With dead ends: 156 [2019-12-26 20:45:55,128 INFO L226 Difference]: Without dead ends: 154 [2019-12-26 20:45:55,128 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:45:55,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-26 20:45:55,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 98. [2019-12-26 20:45:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-26 20:45:55,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-26 20:45:55,132 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-26 20:45:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:55,132 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-26 20:45:55,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:55,132 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-26 20:45:55,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:55,133 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:55,133 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:55,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:55,336 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:55,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:55,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130546, now seen corresponding path program 42 times [2019-12-26 20:45:55,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:55,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059296569] [2019-12-26 20:45:55,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:55,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059296569] [2019-12-26 20:45:55,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640853995] [2019-12-26 20:45:55,402 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 [2019-12-26 20:45:55,443 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:45:55,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:55,444 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:55,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:55,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:55,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:55,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224264298] [2019-12-26 20:45:55,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:55,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:55,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:55,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:55,522 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-26 20:45:55,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:55,783 INFO L93 Difference]: Finished difference Result 129 states and 274 transitions. [2019-12-26 20:45:55,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:45:55,783 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:55,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:55,784 INFO L225 Difference]: With dead ends: 129 [2019-12-26 20:45:55,784 INFO L226 Difference]: Without dead ends: 128 [2019-12-26 20:45:55,784 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 [2019-12-26 20:45:55,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-26 20:45:55,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2019-12-26 20:45:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-26 20:45:55,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-26 20:45:55,787 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-26 20:45:55,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:55,787 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-26 20:45:55,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:55,788 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-26 20:45:55,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:55,788 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:55,788 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:55,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:55,991 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:55,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:55,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130701, now seen corresponding path program 43 times [2019-12-26 20:45:55,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:55,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118857153] [2019-12-26 20:45:55,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:56,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118857153] [2019-12-26 20:45:56,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885480297] [2019-12-26 20:45:56,054 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 [2019-12-26 20:45:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:56,095 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:56,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:56,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:56,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:56,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692560462] [2019-12-26 20:45:56,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:56,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:56,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:56,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:56,203 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-26 20:45:56,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:56,509 INFO L93 Difference]: Finished difference Result 142 states and 296 transitions. [2019-12-26 20:45:56,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:45:56,510 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:56,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:56,511 INFO L225 Difference]: With dead ends: 142 [2019-12-26 20:45:56,511 INFO L226 Difference]: Without dead ends: 141 [2019-12-26 20:45:56,511 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 [2019-12-26 20:45:56,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-26 20:45:56,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 99. [2019-12-26 20:45:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-26 20:45:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-26 20:45:56,514 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-26 20:45:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:56,514 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-26 20:45:56,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-26 20:45:56,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:56,515 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:56,515 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:56,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:56,718 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:56,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:56,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 44 times [2019-12-26 20:45:56,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:56,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026873297] [2019-12-26 20:45:56,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:56,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026873297] [2019-12-26 20:45:56,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301895846] [2019-12-26 20:45:56,781 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 [2019-12-26 20:45:56,823 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:45:56,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:56,824 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:56,824 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:56,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:56,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:56,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099404358] [2019-12-26 20:45:56,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:56,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:56,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:56,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:56,916 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-26 20:45:57,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:57,167 INFO L93 Difference]: Finished difference Result 146 states and 301 transitions. [2019-12-26 20:45:57,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:45:57,170 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:57,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:57,171 INFO L225 Difference]: With dead ends: 146 [2019-12-26 20:45:57,171 INFO L226 Difference]: Without dead ends: 144 [2019-12-26 20:45:57,171 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:45:57,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-12-26 20:45:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 99. [2019-12-26 20:45:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-26 20:45:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-26 20:45:57,173 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-26 20:45:57,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:57,173 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-26 20:45:57,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:57,174 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-26 20:45:57,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:57,174 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:57,174 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:57,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:57,375 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:57,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:57,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135506, now seen corresponding path program 45 times [2019-12-26 20:45:57,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:57,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813263323] [2019-12-26 20:45:57,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:57,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813263323] [2019-12-26 20:45:57,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755407000] [2019-12-26 20:45:57,432 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 [2019-12-26 20:45:57,475 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:45:57,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:57,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:57,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:57,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:57,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:57,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142353529] [2019-12-26 20:45:57,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:57,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:57,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:57,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:57,538 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-26 20:45:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:45:57,823 INFO L93 Difference]: Finished difference Result 140 states and 292 transitions. [2019-12-26 20:45:57,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:45:57,823 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:45:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:45:57,824 INFO L225 Difference]: With dead ends: 140 [2019-12-26 20:45:57,824 INFO L226 Difference]: Without dead ends: 138 [2019-12-26 20:45:57,824 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 [2019-12-26 20:45:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-12-26 20:45:57,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2019-12-26 20:45:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-26 20:45:57,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 224 transitions. [2019-12-26 20:45:57,827 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 224 transitions. Word has length 12 [2019-12-26 20:45:57,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:45:57,827 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 224 transitions. [2019-12-26 20:45:57,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:45:57,828 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 224 transitions. [2019-12-26 20:45:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:45:57,828 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:45:57,828 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:45:58,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:45:58,029 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:45:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:45:58,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279656, now seen corresponding path program 46 times [2019-12-26 20:45:58,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:45:58,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254551092] [2019-12-26 20:45:58,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:45:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:45:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:58,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254551092] [2019-12-26 20:45:58,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81056589] [2019-12-26 20:45:58,086 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 [2019-12-26 20:45:58,128 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:45:58,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:45:58,129 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:45:58,129 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:45:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:45:59,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:45:59,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-26 20:45:59,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264628173] [2019-12-26 20:45:59,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:45:59,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:45:59,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:45:59,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:45:59,255 INFO L87 Difference]: Start difference. First operand 101 states and 224 transitions. Second operand 14 states. [2019-12-26 20:45:59,511 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2019-12-26 20:46:00,469 WARN L192 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2019-12-26 20:46:00,724 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-26 20:46:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:00,760 INFO L93 Difference]: Finished difference Result 143 states and 297 transitions. [2019-12-26 20:46:00,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:46:00,760 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-26 20:46:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:00,761 INFO L225 Difference]: With dead ends: 143 [2019-12-26 20:46:00,762 INFO L226 Difference]: Without dead ends: 142 [2019-12-26 20:46:00,762 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:46:00,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-26 20:46:00,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 98. [2019-12-26 20:46:00,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-26 20:46:00,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2019-12-26 20:46:00,765 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 12 [2019-12-26 20:46:00,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:00,765 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2019-12-26 20:46:00,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:46:00,766 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2019-12-26 20:46:00,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:46:00,766 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:00,766 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:00,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:00,970 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:00,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:00,970 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-26 20:46:00,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:00,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414317009] [2019-12-26 20:46:00,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:01,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414317009] [2019-12-26 20:46:01,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894503915] [2019-12-26 20:46:01,041 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 [2019-12-26 20:46:01,086 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:46:01,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:01,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:01,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:01,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:01,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:01,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370377717] [2019-12-26 20:46:01,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:01,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:01,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:01,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:01,174 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand 16 states. [2019-12-26 20:46:01,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:01,329 INFO L93 Difference]: Finished difference Result 122 states and 258 transitions. [2019-12-26 20:46:01,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:46:01,329 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-26 20:46:01,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:01,330 INFO L225 Difference]: With dead ends: 122 [2019-12-26 20:46:01,330 INFO L226 Difference]: Without dead ends: 121 [2019-12-26 20:46:01,331 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 [2019-12-26 20:46:01,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-26 20:46:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 106. [2019-12-26 20:46:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-26 20:46:01,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 238 transitions. [2019-12-26 20:46:01,333 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 238 transitions. Word has length 12 [2019-12-26 20:46:01,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:01,334 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 238 transitions. [2019-12-26 20:46:01,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:01,334 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 238 transitions. [2019-12-26 20:46:01,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:01,334 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:01,334 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:01,537 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:01,538 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:01,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:01,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1688428305, now seen corresponding path program 7 times [2019-12-26 20:46:01,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:01,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924842507] [2019-12-26 20:46:01,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:01,638 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924842507] [2019-12-26 20:46:01,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441056589] [2019-12-26 20:46:01,639 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 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 [2019-12-26 20:46:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:01,680 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:46:01,680 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:01,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-26 20:46:01,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2019-12-26 20:46:01,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464094279] [2019-12-26 20:46:01,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-26 20:46:01,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:01,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-26 20:46:01,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-26 20:46:01,748 INFO L87 Difference]: Start difference. First operand 106 states and 238 transitions. Second operand 9 states. [2019-12-26 20:46:01,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:01,772 INFO L93 Difference]: Finished difference Result 149 states and 352 transitions. [2019-12-26 20:46:01,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:46:01,772 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-26 20:46:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:01,774 INFO L225 Difference]: With dead ends: 149 [2019-12-26 20:46:01,774 INFO L226 Difference]: Without dead ends: 139 [2019-12-26 20:46:01,775 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-26 20:46:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-26 20:46:01,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2019-12-26 20:46:01,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-26 20:46:01,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2019-12-26 20:46:01,779 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 13 [2019-12-26 20:46:01,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:01,779 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2019-12-26 20:46:01,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-26 20:46:01,779 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2019-12-26 20:46:01,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:01,780 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:01,780 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:01,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:01,983 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:01,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 47 times [2019-12-26 20:46:01,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:01,984 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364180881] [2019-12-26 20:46:01,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:02,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364180881] [2019-12-26 20:46:02,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680096402] [2019-12-26 20:46:02,061 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 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 [2019-12-26 20:46:02,106 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:02,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:02,107 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:02,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:02,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:02,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:02,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277259232] [2019-12-26 20:46:02,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:02,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:02,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:02,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:02,214 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand 16 states. [2019-12-26 20:46:02,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:02,378 INFO L93 Difference]: Finished difference Result 161 states and 371 transitions. [2019-12-26 20:46:02,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:46:02,378 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:02,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:02,379 INFO L225 Difference]: With dead ends: 161 [2019-12-26 20:46:02,379 INFO L226 Difference]: Without dead ends: 160 [2019-12-26 20:46:02,380 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 [2019-12-26 20:46:02,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-26 20:46:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 141. [2019-12-26 20:46:02,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-26 20:46:02,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 338 transitions. [2019-12-26 20:46:02,384 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 338 transitions. Word has length 13 [2019-12-26 20:46:02,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:02,384 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 338 transitions. [2019-12-26 20:46:02,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:02,384 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 338 transitions. [2019-12-26 20:46:02,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:02,385 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:02,385 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:02,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:02,588 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:02,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 48 times [2019-12-26 20:46:02,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:02,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628018332] [2019-12-26 20:46:02,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:02,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628018332] [2019-12-26 20:46:02,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732339384] [2019-12-26 20:46:02,658 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 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 [2019-12-26 20:46:02,705 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:02,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:02,706 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:02,707 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:02,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:02,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:02,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954560413] [2019-12-26 20:46:02,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:02,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:02,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:02,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:02,804 INFO L87 Difference]: Start difference. First operand 141 states and 338 transitions. Second operand 16 states. [2019-12-26 20:46:02,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:02,969 INFO L93 Difference]: Finished difference Result 171 states and 393 transitions. [2019-12-26 20:46:02,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:46:02,969 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:02,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:02,971 INFO L225 Difference]: With dead ends: 171 [2019-12-26 20:46:02,971 INFO L226 Difference]: Without dead ends: 170 [2019-12-26 20:46:02,971 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 [2019-12-26 20:46:02,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-26 20:46:02,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2019-12-26 20:46:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-26 20:46:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 342 transitions. [2019-12-26 20:46:02,975 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 342 transitions. Word has length 13 [2019-12-26 20:46:02,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:02,975 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 342 transitions. [2019-12-26 20:46:02,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:02,976 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 342 transitions. [2019-12-26 20:46:02,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:02,976 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:02,976 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:03,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:03,179 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:03,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:03,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 49 times [2019-12-26 20:46:03,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:03,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792983270] [2019-12-26 20:46:03,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:03,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792983270] [2019-12-26 20:46:03,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360611605] [2019-12-26 20:46:03,272 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 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 [2019-12-26 20:46:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:03,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:03,318 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:03,799 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_168 Int)) (and (<= c_~j~0 (+ c_~i~0 v_~j~0_168)) (<= c_~i~0 (+ v_~j~0_168 1)) (<= (div (+ (* v_~j~0_168 (- 1)) 1) (- 4)) 1))) is different from true [2019-12-26 20:46:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:03,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:03,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:03,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066334681] [2019-12-26 20:46:03,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:03,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:03,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:03,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=137, Unknown=1, NotChecked=26, Total=240 [2019-12-26 20:46:03,801 INFO L87 Difference]: Start difference. First operand 142 states and 342 transitions. Second operand 16 states. [2019-12-26 20:46:04,708 WARN L192 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2019-12-26 20:46:04,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:04,873 INFO L93 Difference]: Finished difference Result 178 states and 403 transitions. [2019-12-26 20:46:04,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:46:04,874 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:04,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:04,875 INFO L225 Difference]: With dead ends: 178 [2019-12-26 20:46:04,875 INFO L226 Difference]: Without dead ends: 177 [2019-12-26 20:46:04,876 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=198, Invalid=310, Unknown=2, NotChecked=42, Total=552 [2019-12-26 20:46:04,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-26 20:46:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 143. [2019-12-26 20:46:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-26 20:46:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 343 transitions. [2019-12-26 20:46:04,879 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 343 transitions. Word has length 13 [2019-12-26 20:46:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:04,879 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 343 transitions. [2019-12-26 20:46:04,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 343 transitions. [2019-12-26 20:46:04,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:04,880 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:04,880 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:05,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:05,083 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:05,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 50 times [2019-12-26 20:46:05,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:05,084 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942406817] [2019-12-26 20:46:05,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:05,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942406817] [2019-12-26 20:46:05,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430515696] [2019-12-26 20:46:05,174 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 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 [2019-12-26 20:46:05,220 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:05,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:05,221 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:05,221 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:05,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:05,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:05,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713223118] [2019-12-26 20:46:05,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:05,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:05,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:05,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:05,321 INFO L87 Difference]: Start difference. First operand 143 states and 343 transitions. Second operand 16 states. [2019-12-26 20:46:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:05,484 INFO L93 Difference]: Finished difference Result 176 states and 404 transitions. [2019-12-26 20:46:05,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:46:05,484 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:05,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:05,485 INFO L225 Difference]: With dead ends: 176 [2019-12-26 20:46:05,485 INFO L226 Difference]: Without dead ends: 175 [2019-12-26 20:46:05,486 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 [2019-12-26 20:46:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-26 20:46:05,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2019-12-26 20:46:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-26 20:46:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 351 transitions. [2019-12-26 20:46:05,490 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 351 transitions. Word has length 13 [2019-12-26 20:46:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:05,491 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 351 transitions. [2019-12-26 20:46:05,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:05,491 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 351 transitions. [2019-12-26 20:46:05,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:05,492 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:05,492 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:05,694 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:05,695 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:05,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:05,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 51 times [2019-12-26 20:46:05,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:05,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101286769] [2019-12-26 20:46:05,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:05,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101286769] [2019-12-26 20:46:05,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291942508] [2019-12-26 20:46:05,762 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 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 [2019-12-26 20:46:05,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:05,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:05,803 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:05,804 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:06,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:06,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:06,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961184936] [2019-12-26 20:46:06,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:06,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:06,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:06,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:06,431 INFO L87 Difference]: Start difference. First operand 145 states and 351 transitions. Second operand 16 states. [2019-12-26 20:46:06,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:06,653 INFO L93 Difference]: Finished difference Result 189 states and 432 transitions. [2019-12-26 20:46:06,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:46:06,654 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:06,656 INFO L225 Difference]: With dead ends: 189 [2019-12-26 20:46:06,656 INFO L226 Difference]: Without dead ends: 188 [2019-12-26 20:46:06,656 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:46:06,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-26 20:46:06,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 144. [2019-12-26 20:46:06,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-26 20:46:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 347 transitions. [2019-12-26 20:46:06,660 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 347 transitions. Word has length 13 [2019-12-26 20:46:06,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:06,661 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 347 transitions. [2019-12-26 20:46:06,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:06,661 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 347 transitions. [2019-12-26 20:46:06,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:06,661 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:06,661 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:06,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:06,862 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:06,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:06,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 52 times [2019-12-26 20:46:06,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:06,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289961831] [2019-12-26 20:46:06,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:06,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289961831] [2019-12-26 20:46:06,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303019184] [2019-12-26 20:46:06,946 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 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 [2019-12-26 20:46:06,995 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:06,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:06,996 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:06,996 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:07,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:07,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:07,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874987070] [2019-12-26 20:46:07,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:07,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:07,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:07,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=156, Unknown=1, NotChecked=0, Total=240 [2019-12-26 20:46:07,997 INFO L87 Difference]: Start difference. First operand 144 states and 347 transitions. Second operand 16 states. [2019-12-26 20:46:08,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:08,304 INFO L93 Difference]: Finished difference Result 198 states and 450 transitions. [2019-12-26 20:46:08,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:46:08,304 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:08,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:08,306 INFO L225 Difference]: With dead ends: 198 [2019-12-26 20:46:08,306 INFO L226 Difference]: Without dead ends: 197 [2019-12-26 20:46:08,306 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=198, Invalid=353, Unknown=1, NotChecked=0, Total=552 [2019-12-26 20:46:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-26 20:46:08,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 145. [2019-12-26 20:46:08,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-26 20:46:08,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 351 transitions. [2019-12-26 20:46:08,311 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 351 transitions. Word has length 13 [2019-12-26 20:46:08,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:08,311 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 351 transitions. [2019-12-26 20:46:08,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:08,311 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 351 transitions. [2019-12-26 20:46:08,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:08,312 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:08,312 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:08,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:08,515 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:08,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:08,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 53 times [2019-12-26 20:46:08,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:08,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228450910] [2019-12-26 20:46:08,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:08,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228450910] [2019-12-26 20:46:08,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169790573] [2019-12-26 20:46:08,587 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 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 [2019-12-26 20:46:08,628 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:08,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:08,630 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:08,630 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:09,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:09,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:09,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698879994] [2019-12-26 20:46:09,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:09,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:09,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:09,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=150, Unknown=2, NotChecked=0, Total=240 [2019-12-26 20:46:09,792 INFO L87 Difference]: Start difference. First operand 145 states and 351 transitions. Second operand 16 states. [2019-12-26 20:46:11,083 WARN L192 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:46:11,573 WARN L192 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-26 20:46:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:11,714 INFO L93 Difference]: Finished difference Result 178 states and 406 transitions. [2019-12-26 20:46:11,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:46:11,714 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:11,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:11,716 INFO L225 Difference]: With dead ends: 178 [2019-12-26 20:46:11,716 INFO L226 Difference]: Without dead ends: 177 [2019-12-26 20:46:11,716 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=212, Invalid=338, Unknown=2, NotChecked=0, Total=552 [2019-12-26 20:46:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-26 20:46:11,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 145. [2019-12-26 20:46:11,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-26 20:46:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 348 transitions. [2019-12-26 20:46:11,721 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 348 transitions. Word has length 13 [2019-12-26 20:46:11,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:11,721 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 348 transitions. [2019-12-26 20:46:11,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 348 transitions. [2019-12-26 20:46:11,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:11,722 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:11,722 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:11,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:11,925 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:11,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:11,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828976, now seen corresponding path program 54 times [2019-12-26 20:46:11,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:11,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869941787] [2019-12-26 20:46:11,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:12,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869941787] [2019-12-26 20:46:12,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949604738] [2019-12-26 20:46:12,003 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:46:12,053 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:12,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:12,054 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:12,055 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:12,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:12,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:12,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558018231] [2019-12-26 20:46:12,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:12,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:12,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:12,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:12,154 INFO L87 Difference]: Start difference. First operand 145 states and 348 transitions. Second operand 16 states. [2019-12-26 20:46:12,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:12,306 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2019-12-26 20:46:12,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:46:12,307 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:12,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:12,308 INFO L225 Difference]: With dead ends: 175 [2019-12-26 20:46:12,308 INFO L226 Difference]: Without dead ends: 174 [2019-12-26 20:46:12,308 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 [2019-12-26 20:46:12,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-26 20:46:12,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 148. [2019-12-26 20:46:12,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-26 20:46:12,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-26 20:46:12,312 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-26 20:46:12,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:12,312 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-26 20:46:12,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-26 20:46:12,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:12,312 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:12,313 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:12,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:12,513 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:12,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 55 times [2019-12-26 20:46:12,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:12,514 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872554934] [2019-12-26 20:46:12,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:12,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872554934] [2019-12-26 20:46:12,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384224480] [2019-12-26 20:46:12,590 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 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 [2019-12-26 20:46:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:12,651 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:12,652 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:12,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:12,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:12,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414615896] [2019-12-26 20:46:12,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:12,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:12,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:12,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:12,821 INFO L87 Difference]: Start difference. First operand 148 states and 360 transitions. Second operand 16 states. [2019-12-26 20:46:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:13,140 INFO L93 Difference]: Finished difference Result 201 states and 459 transitions. [2019-12-26 20:46:13,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:46:13,141 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:13,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:13,142 INFO L225 Difference]: With dead ends: 201 [2019-12-26 20:46:13,142 INFO L226 Difference]: Without dead ends: 200 [2019-12-26 20:46:13,142 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:46:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-26 20:46:13,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 147. [2019-12-26 20:46:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-26 20:46:13,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 356 transitions. [2019-12-26 20:46:13,146 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 356 transitions. Word has length 13 [2019-12-26 20:46:13,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:13,146 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 356 transitions. [2019-12-26 20:46:13,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:13,146 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 356 transitions. [2019-12-26 20:46:13,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:13,147 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:13,147 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:13,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:13,351 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:13,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:13,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 56 times [2019-12-26 20:46:13,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:13,352 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046279584] [2019-12-26 20:46:13,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:13,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046279584] [2019-12-26 20:46:13,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115662299] [2019-12-26 20:46:13,419 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 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 [2019-12-26 20:46:13,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:13,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:13,461 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:13,461 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:14,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:14,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:14,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477227426] [2019-12-26 20:46:14,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:14,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:14,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:14,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=160, Unknown=1, NotChecked=0, Total=240 [2019-12-26 20:46:14,156 INFO L87 Difference]: Start difference. First operand 147 states and 356 transitions. Second operand 16 states. [2019-12-26 20:46:14,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:14,574 INFO L93 Difference]: Finished difference Result 211 states and 478 transitions. [2019-12-26 20:46:14,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:14,574 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:14,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:14,576 INFO L225 Difference]: With dead ends: 211 [2019-12-26 20:46:14,576 INFO L226 Difference]: Without dead ends: 210 [2019-12-26 20:46:14,576 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=208, Invalid=391, Unknown=1, NotChecked=0, Total=600 [2019-12-26 20:46:14,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-26 20:46:14,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 148. [2019-12-26 20:46:14,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-26 20:46:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-26 20:46:14,580 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-26 20:46:14,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:14,580 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-26 20:46:14,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:14,580 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-26 20:46:14,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:14,581 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:14,581 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:14,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:14,785 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:14,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:14,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 57 times [2019-12-26 20:46:14,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:14,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267008712] [2019-12-26 20:46:14,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:14,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267008712] [2019-12-26 20:46:14,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565439460] [2019-12-26 20:46:14,857 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 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 [2019-12-26 20:46:14,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:46:14,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:14,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-26 20:46:14,901 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:14,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:14,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:14,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752817538] [2019-12-26 20:46:14,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:14,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:14,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:14,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:14,981 INFO L87 Difference]: Start difference. First operand 148 states and 360 transitions. Second operand 16 states. [2019-12-26 20:46:15,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:15,260 INFO L93 Difference]: Finished difference Result 207 states and 468 transitions. [2019-12-26 20:46:15,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:15,261 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:15,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:15,262 INFO L225 Difference]: With dead ends: 207 [2019-12-26 20:46:15,262 INFO L226 Difference]: Without dead ends: 202 [2019-12-26 20:46:15,262 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:46:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-26 20:46:15,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 151. [2019-12-26 20:46:15,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-26 20:46:15,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 367 transitions. [2019-12-26 20:46:15,266 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 367 transitions. Word has length 13 [2019-12-26 20:46:15,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:15,267 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 367 transitions. [2019-12-26 20:46:15,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:15,267 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 367 transitions. [2019-12-26 20:46:15,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:15,267 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:15,268 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:15,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:15,471 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:15,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 58 times [2019-12-26 20:46:15,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:15,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124337807] [2019-12-26 20:46:15,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:15,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124337807] [2019-12-26 20:46:15,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018187016] [2019-12-26 20:46:15,558 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 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 [2019-12-26 20:46:15,608 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:15,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:15,609 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:15,609 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:15,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:15,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:15,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593677189] [2019-12-26 20:46:15,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:15,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:15,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:15,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:15,732 INFO L87 Difference]: Start difference. First operand 151 states and 367 transitions. Second operand 16 states. [2019-12-26 20:46:16,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:16,070 INFO L93 Difference]: Finished difference Result 207 states and 475 transitions. [2019-12-26 20:46:16,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:16,070 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:16,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:16,072 INFO L225 Difference]: With dead ends: 207 [2019-12-26 20:46:16,072 INFO L226 Difference]: Without dead ends: 206 [2019-12-26 20:46:16,073 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 [2019-12-26 20:46:16,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-26 20:46:16,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2019-12-26 20:46:16,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-26 20:46:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 371 transitions. [2019-12-26 20:46:16,076 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 371 transitions. Word has length 13 [2019-12-26 20:46:16,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:16,077 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 371 transitions. [2019-12-26 20:46:16,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:16,077 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 371 transitions. [2019-12-26 20:46:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:16,077 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:16,077 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:16,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:16,281 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:16,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:16,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 59 times [2019-12-26 20:46:16,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:16,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251847899] [2019-12-26 20:46:16,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:16,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251847899] [2019-12-26 20:46:16,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766319353] [2019-12-26 20:46:16,361 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 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 [2019-12-26 20:46:16,406 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:16,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:16,407 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:16,408 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:16,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:16,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:16,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277198981] [2019-12-26 20:46:16,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:16,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:16,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:16,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:16,655 INFO L87 Difference]: Start difference. First operand 152 states and 371 transitions. Second operand 16 states. [2019-12-26 20:46:17,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:17,482 INFO L93 Difference]: Finished difference Result 216 states and 496 transitions. [2019-12-26 20:46:17,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:17,482 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:17,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:17,484 INFO L225 Difference]: With dead ends: 216 [2019-12-26 20:46:17,484 INFO L226 Difference]: Without dead ends: 215 [2019-12-26 20:46:17,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:46:17,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-26 20:46:17,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 151. [2019-12-26 20:46:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-26 20:46:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 367 transitions. [2019-12-26 20:46:17,489 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 367 transitions. Word has length 13 [2019-12-26 20:46:17,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:17,489 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 367 transitions. [2019-12-26 20:46:17,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:17,489 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 367 transitions. [2019-12-26 20:46:17,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:17,489 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:17,490 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:17,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:17,690 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:17,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:17,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 60 times [2019-12-26 20:46:17,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:17,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293581480] [2019-12-26 20:46:17,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:17,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293581480] [2019-12-26 20:46:17,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275587416] [2019-12-26 20:46:17,761 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 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 [2019-12-26 20:46:17,803 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:17,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:17,804 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:17,805 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:17,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:17,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:17,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052706206] [2019-12-26 20:46:17,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:17,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:17,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:17,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:17,942 INFO L87 Difference]: Start difference. First operand 151 states and 367 transitions. Second operand 16 states. [2019-12-26 20:46:18,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:18,443 INFO L93 Difference]: Finished difference Result 201 states and 460 transitions. [2019-12-26 20:46:18,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:46:18,443 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:18,445 INFO L225 Difference]: With dead ends: 201 [2019-12-26 20:46:18,445 INFO L226 Difference]: Without dead ends: 200 [2019-12-26 20:46:18,445 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:46:18,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-26 20:46:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 149. [2019-12-26 20:46:18,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-26 20:46:18,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 359 transitions. [2019-12-26 20:46:18,450 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 359 transitions. Word has length 13 [2019-12-26 20:46:18,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:18,450 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 359 transitions. [2019-12-26 20:46:18,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:18,450 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 359 transitions. [2019-12-26 20:46:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:18,451 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:18,451 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:18,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:18,654 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:18,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:18,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 61 times [2019-12-26 20:46:18,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:18,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738237435] [2019-12-26 20:46:18,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:18,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738237435] [2019-12-26 20:46:18,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131770781] [2019-12-26 20:46:18,758 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 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 [2019-12-26 20:46:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:18,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:18,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:18,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:18,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:18,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792067321] [2019-12-26 20:46:18,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:18,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:18,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:18,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:18,915 INFO L87 Difference]: Start difference. First operand 149 states and 359 transitions. Second operand 16 states. [2019-12-26 20:46:19,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:19,072 INFO L93 Difference]: Finished difference Result 175 states and 401 transitions. [2019-12-26 20:46:19,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:46:19,072 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:19,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:19,074 INFO L225 Difference]: With dead ends: 175 [2019-12-26 20:46:19,074 INFO L226 Difference]: Without dead ends: 174 [2019-12-26 20:46:19,074 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:46:19,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-26 20:46:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 154. [2019-12-26 20:46:19,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-26 20:46:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 376 transitions. [2019-12-26 20:46:19,078 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 376 transitions. Word has length 13 [2019-12-26 20:46:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:19,078 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 376 transitions. [2019-12-26 20:46:19,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 376 transitions. [2019-12-26 20:46:19,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:19,078 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:19,078 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:19,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:19,279 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:19,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:19,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118190, now seen corresponding path program 62 times [2019-12-26 20:46:19,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:19,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811878775] [2019-12-26 20:46:19,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:19,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811878775] [2019-12-26 20:46:19,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734711874] [2019-12-26 20:46:19,354 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 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 [2019-12-26 20:46:19,397 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:19,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:19,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:19,398 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:19,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:19,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:19,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208938475] [2019-12-26 20:46:19,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:19,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:19,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:19,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:19,484 INFO L87 Difference]: Start difference. First operand 154 states and 376 transitions. Second operand 16 states. [2019-12-26 20:46:19,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:19,729 INFO L93 Difference]: Finished difference Result 197 states and 450 transitions. [2019-12-26 20:46:19,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:46:19,730 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:19,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:19,732 INFO L225 Difference]: With dead ends: 197 [2019-12-26 20:46:19,732 INFO L226 Difference]: Without dead ends: 196 [2019-12-26 20:46:19,732 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 [2019-12-26 20:46:19,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-26 20:46:19,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 153. [2019-12-26 20:46:19,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-26 20:46:19,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 372 transitions. [2019-12-26 20:46:19,736 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 372 transitions. Word has length 13 [2019-12-26 20:46:19,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:19,736 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 372 transitions. [2019-12-26 20:46:19,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:19,736 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 372 transitions. [2019-12-26 20:46:19,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:19,737 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:19,737 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:19,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:19,938 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:19,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:19,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122840, now seen corresponding path program 63 times [2019-12-26 20:46:19,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:19,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822584813] [2019-12-26 20:46:19,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:20,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822584813] [2019-12-26 20:46:20,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664522080] [2019-12-26 20:46:20,018 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 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 [2019-12-26 20:46:20,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:20,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:20,075 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:46:20,076 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:20,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:20,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:20,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369185702] [2019-12-26 20:46:20,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:20,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:20,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:20,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:20,211 INFO L87 Difference]: Start difference. First operand 153 states and 372 transitions. Second operand 16 states. [2019-12-26 20:46:20,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:20,609 INFO L93 Difference]: Finished difference Result 219 states and 493 transitions. [2019-12-26 20:46:20,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:20,609 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:20,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:20,611 INFO L225 Difference]: With dead ends: 219 [2019-12-26 20:46:20,611 INFO L226 Difference]: Without dead ends: 218 [2019-12-26 20:46:20,611 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:46:20,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-26 20:46:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 154. [2019-12-26 20:46:20,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-26 20:46:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 376 transitions. [2019-12-26 20:46:20,615 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 376 transitions. Word has length 13 [2019-12-26 20:46:20,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:20,616 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 376 transitions. [2019-12-26 20:46:20,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:20,616 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 376 transitions. [2019-12-26 20:46:20,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:20,617 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:20,617 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:20,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:20,822 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:20,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:20,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122995, now seen corresponding path program 64 times [2019-12-26 20:46:20,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:20,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461011465] [2019-12-26 20:46:20,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:20,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461011465] [2019-12-26 20:46:20,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322621192] [2019-12-26 20:46:20,899 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:46:20,938 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:20,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:20,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:20,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:21,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:21,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:21,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14286922] [2019-12-26 20:46:21,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:21,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:21,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:21,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:21,028 INFO L87 Difference]: Start difference. First operand 154 states and 376 transitions. Second operand 16 states. [2019-12-26 20:46:21,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:21,335 INFO L93 Difference]: Finished difference Result 207 states and 472 transitions. [2019-12-26 20:46:21,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:21,335 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:21,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:21,337 INFO L225 Difference]: With dead ends: 207 [2019-12-26 20:46:21,337 INFO L226 Difference]: Without dead ends: 206 [2019-12-26 20:46:21,337 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:21,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-26 20:46:21,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2019-12-26 20:46:21,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-26 20:46:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 368 transitions. [2019-12-26 20:46:21,341 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 368 transitions. Word has length 13 [2019-12-26 20:46:21,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:21,341 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 368 transitions. [2019-12-26 20:46:21,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:21,341 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 368 transitions. [2019-12-26 20:46:21,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:21,342 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:21,342 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:21,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:21,545 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:21,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:21,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 65 times [2019-12-26 20:46:21,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:21,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982864940] [2019-12-26 20:46:21,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:21,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982864940] [2019-12-26 20:46:21,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251223234] [2019-12-26 20:46:21,619 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 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 [2019-12-26 20:46:21,666 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:21,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:21,668 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:21,668 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:21,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:21,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:21,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345621841] [2019-12-26 20:46:21,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:21,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:21,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:21,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:21,775 INFO L87 Difference]: Start difference. First operand 152 states and 368 transitions. Second operand 16 states. [2019-12-26 20:46:22,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:22,505 INFO L93 Difference]: Finished difference Result 222 states and 496 transitions. [2019-12-26 20:46:22,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:22,506 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:22,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:22,508 INFO L225 Difference]: With dead ends: 222 [2019-12-26 20:46:22,508 INFO L226 Difference]: Without dead ends: 221 [2019-12-26 20:46:22,508 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-26 20:46:22,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 154. [2019-12-26 20:46:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-26 20:46:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 376 transitions. [2019-12-26 20:46:22,512 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 376 transitions. Word has length 13 [2019-12-26 20:46:22,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:22,512 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 376 transitions. [2019-12-26 20:46:22,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:22,512 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 376 transitions. [2019-12-26 20:46:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:22,514 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:22,514 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:22,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:22,719 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:22,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:22,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 66 times [2019-12-26 20:46:22,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:22,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320590872] [2019-12-26 20:46:22,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:22,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320590872] [2019-12-26 20:46:22,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885949610] [2019-12-26 20:46:22,785 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 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 [2019-12-26 20:46:22,826 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:22,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:22,827 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:22,827 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:23,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:23,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:23,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496341279] [2019-12-26 20:46:23,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:23,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:23,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:23,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:23,608 INFO L87 Difference]: Start difference. First operand 154 states and 376 transitions. Second operand 16 states. [2019-12-26 20:46:24,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:24,040 INFO L93 Difference]: Finished difference Result 237 states and 539 transitions. [2019-12-26 20:46:24,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:24,041 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:24,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:24,042 INFO L225 Difference]: With dead ends: 237 [2019-12-26 20:46:24,043 INFO L226 Difference]: Without dead ends: 235 [2019-12-26 20:46:24,043 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:24,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-26 20:46:24,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 156. [2019-12-26 20:46:24,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-26 20:46:24,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 384 transitions. [2019-12-26 20:46:24,047 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 384 transitions. Word has length 13 [2019-12-26 20:46:24,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:24,047 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 384 transitions. [2019-12-26 20:46:24,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:24,047 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 384 transitions. [2019-12-26 20:46:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:24,048 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:24,048 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:24,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:24,251 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:24,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:24,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 67 times [2019-12-26 20:46:24,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:24,251 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425950731] [2019-12-26 20:46:24,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:24,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425950731] [2019-12-26 20:46:24,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875655294] [2019-12-26 20:46:24,327 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 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 [2019-12-26 20:46:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:24,371 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:24,372 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:24,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:24,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:24,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691876526] [2019-12-26 20:46:24,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:24,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:24,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:24,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:24,466 INFO L87 Difference]: Start difference. First operand 156 states and 384 transitions. Second operand 16 states. [2019-12-26 20:46:25,058 WARN L192 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:46:25,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:25,406 INFO L93 Difference]: Finished difference Result 235 states and 531 transitions. [2019-12-26 20:46:25,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:25,406 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:25,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:25,408 INFO L225 Difference]: With dead ends: 235 [2019-12-26 20:46:25,408 INFO L226 Difference]: Without dead ends: 233 [2019-12-26 20:46:25,409 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=278, Invalid=534, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:46:25,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-26 20:46:25,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 155. [2019-12-26 20:46:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-26 20:46:25,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 380 transitions. [2019-12-26 20:46:25,412 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 380 transitions. Word has length 13 [2019-12-26 20:46:25,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:25,413 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 380 transitions. [2019-12-26 20:46:25,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:25,413 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 380 transitions. [2019-12-26 20:46:25,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:25,413 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:25,413 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:25,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:25,614 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:25,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:25,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 68 times [2019-12-26 20:46:25,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:25,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607139330] [2019-12-26 20:46:25,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:25,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607139330] [2019-12-26 20:46:25,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653369733] [2019-12-26 20:46:25,680 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 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 [2019-12-26 20:46:25,721 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:25,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:25,722 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:25,722 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:25,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:25,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:25,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340825746] [2019-12-26 20:46:25,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:25,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:25,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:25,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:25,838 INFO L87 Difference]: Start difference. First operand 155 states and 380 transitions. Second operand 16 states. [2019-12-26 20:46:26,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:26,109 INFO L93 Difference]: Finished difference Result 213 states and 487 transitions. [2019-12-26 20:46:26,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:46:26,109 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:26,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:26,111 INFO L225 Difference]: With dead ends: 213 [2019-12-26 20:46:26,111 INFO L226 Difference]: Without dead ends: 212 [2019-12-26 20:46:26,112 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 [2019-12-26 20:46:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-12-26 20:46:26,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 157. [2019-12-26 20:46:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-26 20:46:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 388 transitions. [2019-12-26 20:46:26,115 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 388 transitions. Word has length 13 [2019-12-26 20:46:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:26,115 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 388 transitions. [2019-12-26 20:46:26,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:26,115 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 388 transitions. [2019-12-26 20:46:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:26,116 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:26,116 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:26,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:26,317 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:26,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:26,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 69 times [2019-12-26 20:46:26,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:26,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029166065] [2019-12-26 20:46:26,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:26,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029166065] [2019-12-26 20:46:26,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248123706] [2019-12-26 20:46:26,384 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 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 [2019-12-26 20:46:26,427 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:26,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:26,427 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:26,428 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:26,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:26,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:26,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098093964] [2019-12-26 20:46:26,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:26,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:26,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:26,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:26,513 INFO L87 Difference]: Start difference. First operand 157 states and 388 transitions. Second operand 16 states. [2019-12-26 20:46:26,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:26,812 INFO L93 Difference]: Finished difference Result 224 states and 519 transitions. [2019-12-26 20:46:26,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:26,813 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:26,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:26,815 INFO L225 Difference]: With dead ends: 224 [2019-12-26 20:46:26,815 INFO L226 Difference]: Without dead ends: 223 [2019-12-26 20:46:26,815 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 [2019-12-26 20:46:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-26 20:46:26,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 156. [2019-12-26 20:46:26,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-26 20:46:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 384 transitions. [2019-12-26 20:46:26,820 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 384 transitions. Word has length 13 [2019-12-26 20:46:26,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:26,820 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 384 transitions. [2019-12-26 20:46:26,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:26,820 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 384 transitions. [2019-12-26 20:46:26,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:26,821 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:26,821 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:27,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:27,022 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:27,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:27,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 70 times [2019-12-26 20:46:27,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:27,023 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511276583] [2019-12-26 20:46:27,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:27,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511276583] [2019-12-26 20:46:27,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066504106] [2019-12-26 20:46:27,088 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 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 [2019-12-26 20:46:27,130 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:27,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:27,131 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:27,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:27,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:27,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:27,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522259843] [2019-12-26 20:46:27,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:27,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:27,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:27,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:27,220 INFO L87 Difference]: Start difference. First operand 156 states and 384 transitions. Second operand 16 states. [2019-12-26 20:46:27,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:27,484 INFO L93 Difference]: Finished difference Result 233 states and 537 transitions. [2019-12-26 20:46:27,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:46:27,484 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:27,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:27,486 INFO L225 Difference]: With dead ends: 233 [2019-12-26 20:46:27,486 INFO L226 Difference]: Without dead ends: 232 [2019-12-26 20:46:27,487 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 [2019-12-26 20:46:27,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-12-26 20:46:27,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 157. [2019-12-26 20:46:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-26 20:46:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 388 transitions. [2019-12-26 20:46:27,498 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 388 transitions. Word has length 13 [2019-12-26 20:46:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:27,498 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 388 transitions. [2019-12-26 20:46:27,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 388 transitions. [2019-12-26 20:46:27,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:27,499 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:27,499 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:27,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:27,699 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:27,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 71 times [2019-12-26 20:46:27,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:27,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154354420] [2019-12-26 20:46:27,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:27,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154354420] [2019-12-26 20:46:27,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178365798] [2019-12-26 20:46:27,765 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 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 [2019-12-26 20:46:27,807 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:27,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:27,808 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:27,809 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:27,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:27,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:27,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887986168] [2019-12-26 20:46:27,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:27,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:27,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:27,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:27,903 INFO L87 Difference]: Start difference. First operand 157 states and 388 transitions. Second operand 16 states. [2019-12-26 20:46:28,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:28,216 INFO L93 Difference]: Finished difference Result 225 states and 518 transitions. [2019-12-26 20:46:28,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:28,217 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:28,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:28,219 INFO L225 Difference]: With dead ends: 225 [2019-12-26 20:46:28,219 INFO L226 Difference]: Without dead ends: 223 [2019-12-26 20:46:28,219 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 [2019-12-26 20:46:28,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-26 20:46:28,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 155. [2019-12-26 20:46:28,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-26 20:46:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 377 transitions. [2019-12-26 20:46:28,223 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 377 transitions. Word has length 13 [2019-12-26 20:46:28,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:28,224 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 377 transitions. [2019-12-26 20:46:28,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:28,224 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 377 transitions. [2019-12-26 20:46:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:28,224 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:28,225 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:28,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:28,428 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:28,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:28,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 72 times [2019-12-26 20:46:28,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:28,429 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372417008] [2019-12-26 20:46:28,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:28,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372417008] [2019-12-26 20:46:28,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290029014] [2019-12-26 20:46:28,502 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 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 [2019-12-26 20:46:28,547 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:46:28,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:28,547 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:28,548 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:28,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:28,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:28,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457355442] [2019-12-26 20:46:28,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:28,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:28,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:28,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:28,649 INFO L87 Difference]: Start difference. First operand 155 states and 377 transitions. Second operand 16 states. [2019-12-26 20:46:29,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:29,031 INFO L93 Difference]: Finished difference Result 222 states and 505 transitions. [2019-12-26 20:46:29,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:29,031 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:29,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:29,033 INFO L225 Difference]: With dead ends: 222 [2019-12-26 20:46:29,033 INFO L226 Difference]: Without dead ends: 221 [2019-12-26 20:46:29,033 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 [2019-12-26 20:46:29,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-26 20:46:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 152. [2019-12-26 20:46:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-26 20:46:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 365 transitions. [2019-12-26 20:46:29,039 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 365 transitions. Word has length 13 [2019-12-26 20:46:29,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:29,039 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 365 transitions. [2019-12-26 20:46:29,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:29,040 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 365 transitions. [2019-12-26 20:46:29,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:29,040 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:29,040 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:29,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:29,244 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:29,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:29,244 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 73 times [2019-12-26 20:46:29,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:29,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493659421] [2019-12-26 20:46:29,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:29,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493659421] [2019-12-26 20:46:29,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321385576] [2019-12-26 20:46:29,320 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 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 [2019-12-26 20:46:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:29,360 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:29,361 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:29,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:29,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:29,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55444884] [2019-12-26 20:46:29,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:29,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:29,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:29,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:29,439 INFO L87 Difference]: Start difference. First operand 152 states and 365 transitions. Second operand 16 states. [2019-12-26 20:46:29,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:29,728 INFO L93 Difference]: Finished difference Result 188 states and 426 transitions. [2019-12-26 20:46:29,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:46:29,730 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:29,731 INFO L225 Difference]: With dead ends: 188 [2019-12-26 20:46:29,731 INFO L226 Difference]: Without dead ends: 187 [2019-12-26 20:46:29,731 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 [2019-12-26 20:46:29,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-26 20:46:29,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 152. [2019-12-26 20:46:29,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-26 20:46:29,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 365 transitions. [2019-12-26 20:46:29,734 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 365 transitions. Word has length 13 [2019-12-26 20:46:29,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:29,734 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 365 transitions. [2019-12-26 20:46:29,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:29,734 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 365 transitions. [2019-12-26 20:46:29,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:29,735 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:29,735 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:29,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:29,938 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:29,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:29,939 INFO L82 PathProgramCache]: Analyzing trace with hash -573265077, now seen corresponding path program 74 times [2019-12-26 20:46:29,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:29,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116973392] [2019-12-26 20:46:29,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:30,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116973392] [2019-12-26 20:46:30,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389740496] [2019-12-26 20:46:30,010 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 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 [2019-12-26 20:46:30,059 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:30,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:30,059 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:30,060 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:30,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:30,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:30,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632913622] [2019-12-26 20:46:30,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:30,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:30,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:30,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2019-12-26 20:46:30,562 INFO L87 Difference]: Start difference. First operand 152 states and 365 transitions. Second operand 16 states. [2019-12-26 20:46:32,084 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-26 20:46:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:32,148 INFO L93 Difference]: Finished difference Result 204 states and 457 transitions. [2019-12-26 20:46:32,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:46:32,149 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:32,150 INFO L225 Difference]: With dead ends: 204 [2019-12-26 20:46:32,150 INFO L226 Difference]: Without dead ends: 203 [2019-12-26 20:46:32,151 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=227, Invalid=472, Unknown=3, NotChecked=0, Total=702 [2019-12-26 20:46:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-26 20:46:32,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 153. [2019-12-26 20:46:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-26 20:46:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 369 transitions. [2019-12-26 20:46:32,154 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 369 transitions. Word has length 13 [2019-12-26 20:46:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:32,154 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 369 transitions. [2019-12-26 20:46:32,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:32,155 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 369 transitions. [2019-12-26 20:46:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:32,155 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:32,155 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:32,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:32,356 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:32,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:32,356 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 75 times [2019-12-26 20:46:32,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:32,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732146981] [2019-12-26 20:46:32,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:32,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732146981] [2019-12-26 20:46:32,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062721229] [2019-12-26 20:46:32,427 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 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 [2019-12-26 20:46:32,472 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:32,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:32,473 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-26 20:46:32,474 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:32,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:32,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:32,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305144799] [2019-12-26 20:46:32,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:32,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:32,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:32,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:32,560 INFO L87 Difference]: Start difference. First operand 153 states and 369 transitions. Second operand 16 states. [2019-12-26 20:46:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:32,773 INFO L93 Difference]: Finished difference Result 203 states and 459 transitions. [2019-12-26 20:46:32,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:46:32,773 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:32,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:32,775 INFO L225 Difference]: With dead ends: 203 [2019-12-26 20:46:32,775 INFO L226 Difference]: Without dead ends: 202 [2019-12-26 20:46:32,775 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:46:32,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-26 20:46:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2019-12-26 20:46:32,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-26 20:46:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 365 transitions. [2019-12-26 20:46:32,779 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 365 transitions. Word has length 13 [2019-12-26 20:46:32,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:32,779 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 365 transitions. [2019-12-26 20:46:32,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:32,779 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 365 transitions. [2019-12-26 20:46:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:32,780 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:32,780 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:32,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:32,981 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:32,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:32,981 INFO L82 PathProgramCache]: Analyzing trace with hash -573409227, now seen corresponding path program 76 times [2019-12-26 20:46:32,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:32,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908420192] [2019-12-26 20:46:32,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:33,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908420192] [2019-12-26 20:46:33,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763393723] [2019-12-26 20:46:33,069 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 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 [2019-12-26 20:46:33,110 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:33,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:33,111 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:33,111 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:33,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:33,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:33,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518417974] [2019-12-26 20:46:33,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:33,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:33,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:33,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:33,213 INFO L87 Difference]: Start difference. First operand 152 states and 365 transitions. Second operand 16 states. [2019-12-26 20:46:34,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:34,241 INFO L93 Difference]: Finished difference Result 214 states and 479 transitions. [2019-12-26 20:46:34,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:34,242 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:34,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:34,244 INFO L225 Difference]: With dead ends: 214 [2019-12-26 20:46:34,244 INFO L226 Difference]: Without dead ends: 213 [2019-12-26 20:46:34,244 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:34,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-26 20:46:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 154. [2019-12-26 20:46:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-26 20:46:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 373 transitions. [2019-12-26 20:46:34,249 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 373 transitions. Word has length 13 [2019-12-26 20:46:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:34,249 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 373 transitions. [2019-12-26 20:46:34,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 373 transitions. [2019-12-26 20:46:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:34,250 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:34,250 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:34,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:34,451 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:34,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:34,451 INFO L82 PathProgramCache]: Analyzing trace with hash -573409382, now seen corresponding path program 77 times [2019-12-26 20:46:34,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:34,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238080616] [2019-12-26 20:46:34,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:34,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238080616] [2019-12-26 20:46:34,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879631543] [2019-12-26 20:46:34,525 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 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 [2019-12-26 20:46:34,569 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:34,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:34,570 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:34,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:36,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:36,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:36,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553035443] [2019-12-26 20:46:36,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:36,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:36,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:36,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=170, Unknown=2, NotChecked=0, Total=240 [2019-12-26 20:46:36,124 INFO L87 Difference]: Start difference. First operand 154 states and 373 transitions. Second operand 16 states. [2019-12-26 20:46:36,576 WARN L192 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 9 [2019-12-26 20:46:37,018 WARN L192 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:46:37,932 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-26 20:46:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:38,167 INFO L93 Difference]: Finished difference Result 231 states and 518 transitions. [2019-12-26 20:46:38,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:38,168 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:38,169 INFO L225 Difference]: With dead ends: 231 [2019-12-26 20:46:38,170 INFO L226 Difference]: Without dead ends: 229 [2019-12-26 20:46:38,170 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=240, Invalid=514, Unknown=2, NotChecked=0, Total=756 [2019-12-26 20:46:38,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-26 20:46:38,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 154. [2019-12-26 20:46:38,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-26 20:46:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 373 transitions. [2019-12-26 20:46:38,173 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 373 transitions. Word has length 13 [2019-12-26 20:46:38,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:38,174 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 373 transitions. [2019-12-26 20:46:38,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 373 transitions. [2019-12-26 20:46:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:38,174 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:38,175 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:38,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:38,378 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:38,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:38,378 INFO L82 PathProgramCache]: Analyzing trace with hash -573414032, now seen corresponding path program 78 times [2019-12-26 20:46:38,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:38,379 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924763138] [2019-12-26 20:46:38,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:38,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924763138] [2019-12-26 20:46:38,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130286192] [2019-12-26 20:46:38,454 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 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 [2019-12-26 20:46:38,499 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:38,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:38,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:38,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:38,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:38,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:38,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716638037] [2019-12-26 20:46:38,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:38,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:38,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:38,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:38,602 INFO L87 Difference]: Start difference. First operand 154 states and 373 transitions. Second operand 16 states. [2019-12-26 20:46:39,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:39,079 INFO L93 Difference]: Finished difference Result 218 states and 495 transitions. [2019-12-26 20:46:39,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:39,080 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:39,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:39,082 INFO L225 Difference]: With dead ends: 218 [2019-12-26 20:46:39,082 INFO L226 Difference]: Without dead ends: 217 [2019-12-26 20:46:39,082 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:46:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-26 20:46:39,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 152. [2019-12-26 20:46:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-26 20:46:39,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 365 transitions. [2019-12-26 20:46:39,085 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 365 transitions. Word has length 13 [2019-12-26 20:46:39,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:39,086 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 365 transitions. [2019-12-26 20:46:39,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:39,086 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 365 transitions. [2019-12-26 20:46:39,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:39,086 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:39,086 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:39,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:39,287 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:39,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:39,288 INFO L82 PathProgramCache]: Analyzing trace with hash -577877877, now seen corresponding path program 79 times [2019-12-26 20:46:39,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:39,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249965225] [2019-12-26 20:46:39,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:39,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249965225] [2019-12-26 20:46:39,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377756857] [2019-12-26 20:46:39,353 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 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 [2019-12-26 20:46:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:39,396 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:39,396 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:39,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:39,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:39,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966831483] [2019-12-26 20:46:39,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:39,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:39,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:39,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:39,512 INFO L87 Difference]: Start difference. First operand 152 states and 365 transitions. Second operand 16 states. [2019-12-26 20:46:40,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:40,056 INFO L93 Difference]: Finished difference Result 202 states and 455 transitions. [2019-12-26 20:46:40,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:40,056 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:40,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:40,058 INFO L225 Difference]: With dead ends: 202 [2019-12-26 20:46:40,058 INFO L226 Difference]: Without dead ends: 201 [2019-12-26 20:46:40,058 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 [2019-12-26 20:46:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-26 20:46:40,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 155. [2019-12-26 20:46:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-26 20:46:40,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 377 transitions. [2019-12-26 20:46:40,062 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 377 transitions. Word has length 13 [2019-12-26 20:46:40,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:40,062 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 377 transitions. [2019-12-26 20:46:40,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:40,063 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 377 transitions. [2019-12-26 20:46:40,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:40,063 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:40,063 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:40,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:40,264 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:40,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:40,264 INFO L82 PathProgramCache]: Analyzing trace with hash -577878032, now seen corresponding path program 80 times [2019-12-26 20:46:40,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:40,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193850183] [2019-12-26 20:46:40,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:40,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193850183] [2019-12-26 20:46:40,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612353731] [2019-12-26 20:46:40,343 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 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 [2019-12-26 20:46:40,386 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:40,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:40,387 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:40,388 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:44,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:44,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:44,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186136331] [2019-12-26 20:46:44,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:44,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:44,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:44,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=170, Unknown=1, NotChecked=0, Total=240 [2019-12-26 20:46:44,581 INFO L87 Difference]: Start difference. First operand 155 states and 377 transitions. Second operand 16 states. [2019-12-26 20:46:50,917 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-26 20:46:51,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:51,364 INFO L93 Difference]: Finished difference Result 223 states and 500 transitions. [2019-12-26 20:46:51,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:51,365 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:51,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:51,367 INFO L225 Difference]: With dead ends: 223 [2019-12-26 20:46:51,367 INFO L226 Difference]: Without dead ends: 222 [2019-12-26 20:46:51,367 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=246, Invalid=509, Unknown=1, NotChecked=0, Total=756 [2019-12-26 20:46:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-26 20:46:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 154. [2019-12-26 20:46:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-26 20:46:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 373 transitions. [2019-12-26 20:46:51,371 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 373 transitions. Word has length 13 [2019-12-26 20:46:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:51,371 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 373 transitions. [2019-12-26 20:46:51,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 373 transitions. [2019-12-26 20:46:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:51,372 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:51,372 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:51,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:51,573 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:51,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:51,573 INFO L82 PathProgramCache]: Analyzing trace with hash -577882682, now seen corresponding path program 81 times [2019-12-26 20:46:51,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:51,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548075299] [2019-12-26 20:46:51,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:51,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548075299] [2019-12-26 20:46:51,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234532430] [2019-12-26 20:46:51,642 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:46:51,687 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:46:51,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:51,688 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:51,689 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:51,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:51,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:51,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544838911] [2019-12-26 20:46:51,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:51,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:51,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:51,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:51,817 INFO L87 Difference]: Start difference. First operand 154 states and 373 transitions. Second operand 16 states. [2019-12-26 20:46:52,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:52,288 INFO L93 Difference]: Finished difference Result 246 states and 552 transitions. [2019-12-26 20:46:52,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:52,289 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:52,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:52,291 INFO L225 Difference]: With dead ends: 246 [2019-12-26 20:46:52,291 INFO L226 Difference]: Without dead ends: 244 [2019-12-26 20:46:52,291 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:46:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-12-26 20:46:52,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 157. [2019-12-26 20:46:52,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-26 20:46:52,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 385 transitions. [2019-12-26 20:46:52,295 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 385 transitions. Word has length 13 [2019-12-26 20:46:52,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:52,295 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 385 transitions. [2019-12-26 20:46:52,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 385 transitions. [2019-12-26 20:46:52,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:52,296 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:52,296 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:52,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:52,497 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:52,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:52,497 INFO L82 PathProgramCache]: Analyzing trace with hash -577882837, now seen corresponding path program 82 times [2019-12-26 20:46:52,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:52,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621850808] [2019-12-26 20:46:52,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:52,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621850808] [2019-12-26 20:46:52,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752994677] [2019-12-26 20:46:52,575 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 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 [2019-12-26 20:46:52,617 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:46:52,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:52,618 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:52,619 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:52,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:52,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:52,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262880720] [2019-12-26 20:46:52,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:52,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:52,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:52,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:52,753 INFO L87 Difference]: Start difference. First operand 157 states and 385 transitions. Second operand 16 states. [2019-12-26 20:46:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:53,747 INFO L93 Difference]: Finished difference Result 232 states and 525 transitions. [2019-12-26 20:46:53,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:53,748 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:53,749 INFO L225 Difference]: With dead ends: 232 [2019-12-26 20:46:53,750 INFO L226 Difference]: Without dead ends: 230 [2019-12-26 20:46:53,750 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:46:53,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-26 20:46:53,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 155. [2019-12-26 20:46:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-26 20:46:53,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 377 transitions. [2019-12-26 20:46:53,754 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 377 transitions. Word has length 13 [2019-12-26 20:46:53,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:53,754 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 377 transitions. [2019-12-26 20:46:53,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:53,754 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 377 transitions. [2019-12-26 20:46:53,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:53,755 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:53,755 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:53,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:53,956 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:53,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:53,956 INFO L82 PathProgramCache]: Analyzing trace with hash -578026987, now seen corresponding path program 83 times [2019-12-26 20:46:53,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:53,957 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391816597] [2019-12-26 20:46:53,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:54,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391816597] [2019-12-26 20:46:54,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102706688] [2019-12-26 20:46:54,045 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 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 [2019-12-26 20:46:54,086 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:46:54,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:54,086 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:54,087 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:54,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:54,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:54,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861011829] [2019-12-26 20:46:54,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:54,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:54,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:54,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:54,211 INFO L87 Difference]: Start difference. First operand 155 states and 377 transitions. Second operand 16 states. [2019-12-26 20:46:54,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:54,735 INFO L93 Difference]: Finished difference Result 242 states and 541 transitions. [2019-12-26 20:46:54,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:54,735 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:54,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:54,737 INFO L225 Difference]: With dead ends: 242 [2019-12-26 20:46:54,737 INFO L226 Difference]: Without dead ends: 240 [2019-12-26 20:46:54,737 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:46:54,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-12-26 20:46:54,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 156. [2019-12-26 20:46:54,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-26 20:46:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2019-12-26 20:46:54,741 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 13 [2019-12-26 20:46:54,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:54,741 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2019-12-26 20:46:54,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:54,741 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2019-12-26 20:46:54,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:54,742 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:54,742 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:54,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:54,943 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:54,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:54,943 INFO L82 PathProgramCache]: Analyzing trace with hash -716406027, now seen corresponding path program 84 times [2019-12-26 20:46:54,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:54,943 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534609329] [2019-12-26 20:46:54,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:55,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534609329] [2019-12-26 20:46:55,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33437766] [2019-12-26 20:46:55,050 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 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 [2019-12-26 20:46:55,108 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:46:55,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:55,109 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:55,110 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:55,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:55,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:55,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139110055] [2019-12-26 20:46:55,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:55,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:55,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:55,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:55,193 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 16 states. [2019-12-26 20:46:55,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:55,522 INFO L93 Difference]: Finished difference Result 199 states and 461 transitions. [2019-12-26 20:46:55,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:46:55,523 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:55,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:55,524 INFO L225 Difference]: With dead ends: 199 [2019-12-26 20:46:55,525 INFO L226 Difference]: Without dead ends: 198 [2019-12-26 20:46:55,525 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 [2019-12-26 20:46:55,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-26 20:46:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 159. [2019-12-26 20:46:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-26 20:46:55,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 393 transitions. [2019-12-26 20:46:55,529 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 393 transitions. Word has length 13 [2019-12-26 20:46:55,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:55,529 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 393 transitions. [2019-12-26 20:46:55,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 393 transitions. [2019-12-26 20:46:55,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:55,529 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:55,530 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:55,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:55,730 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:55,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:55,731 INFO L82 PathProgramCache]: Analyzing trace with hash -716406182, now seen corresponding path program 85 times [2019-12-26 20:46:55,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:55,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93479228] [2019-12-26 20:46:55,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:55,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93479228] [2019-12-26 20:46:55,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109889418] [2019-12-26 20:46:55,834 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 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 [2019-12-26 20:46:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:55,891 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:55,892 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:55,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:55,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:55,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528581318] [2019-12-26 20:46:55,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:55,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:55,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:55,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:55,986 INFO L87 Difference]: Start difference. First operand 159 states and 393 transitions. Second operand 16 states. [2019-12-26 20:46:56,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:56,397 INFO L93 Difference]: Finished difference Result 234 states and 538 transitions. [2019-12-26 20:46:56,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:56,397 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:56,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:56,399 INFO L225 Difference]: With dead ends: 234 [2019-12-26 20:46:56,399 INFO L226 Difference]: Without dead ends: 233 [2019-12-26 20:46:56,400 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:46:56,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-26 20:46:56,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 158. [2019-12-26 20:46:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-26 20:46:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 389 transitions. [2019-12-26 20:46:56,404 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 389 transitions. Word has length 13 [2019-12-26 20:46:56,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:56,405 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 389 transitions. [2019-12-26 20:46:56,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:56,405 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 389 transitions. [2019-12-26 20:46:56,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:56,405 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:56,405 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:56,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:56,609 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:56,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:56,609 INFO L82 PathProgramCache]: Analyzing trace with hash -716410832, now seen corresponding path program 86 times [2019-12-26 20:46:56,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:56,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717922744] [2019-12-26 20:46:56,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:56,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717922744] [2019-12-26 20:46:56,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63644793] [2019-12-26 20:46:56,684 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 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 [2019-12-26 20:46:56,727 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:46:56,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:56,728 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:56,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:56,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:56,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:56,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38947668] [2019-12-26 20:46:56,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:56,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:56,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:56,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:56,846 INFO L87 Difference]: Start difference. First operand 158 states and 389 transitions. Second operand 16 states. [2019-12-26 20:46:58,021 WARN L192 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2019-12-26 20:46:58,875 WARN L192 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-26 20:46:58,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:58,911 INFO L93 Difference]: Finished difference Result 238 states and 542 transitions. [2019-12-26 20:46:58,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:46:58,912 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:58,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:58,913 INFO L225 Difference]: With dead ends: 238 [2019-12-26 20:46:58,913 INFO L226 Difference]: Without dead ends: 237 [2019-12-26 20:46:58,914 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:46:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-26 20:46:58,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 159. [2019-12-26 20:46:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-26 20:46:58,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 393 transitions. [2019-12-26 20:46:58,918 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 393 transitions. Word has length 13 [2019-12-26 20:46:58,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:58,918 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 393 transitions. [2019-12-26 20:46:58,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:58,918 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 393 transitions. [2019-12-26 20:46:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:58,919 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:58,919 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:59,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:59,122 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:59,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:59,122 INFO L82 PathProgramCache]: Analyzing trace with hash -716410987, now seen corresponding path program 87 times [2019-12-26 20:46:59,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:59,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146984816] [2019-12-26 20:46:59,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:46:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:59,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146984816] [2019-12-26 20:46:59,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199922513] [2019-12-26 20:46:59,199 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 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 [2019-12-26 20:46:59,243 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:46:59,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:46:59,244 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:46:59,244 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:46:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:46:59,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:46:59,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:46:59,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785933897] [2019-12-26 20:46:59,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:46:59,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:46:59,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:46:59,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:46:59,339 INFO L87 Difference]: Start difference. First operand 159 states and 393 transitions. Second operand 16 states. [2019-12-26 20:46:59,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:46:59,781 INFO L93 Difference]: Finished difference Result 245 states and 559 transitions. [2019-12-26 20:46:59,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:46:59,782 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:46:59,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:46:59,784 INFO L225 Difference]: With dead ends: 245 [2019-12-26 20:46:59,784 INFO L226 Difference]: Without dead ends: 243 [2019-12-26 20:46:59,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:46:59,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-26 20:46:59,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 158. [2019-12-26 20:46:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-26 20:46:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 389 transitions. [2019-12-26 20:46:59,789 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 389 transitions. Word has length 13 [2019-12-26 20:46:59,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:46:59,790 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 389 transitions. [2019-12-26 20:46:59,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:46:59,790 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 389 transitions. [2019-12-26 20:46:59,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:46:59,790 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:46:59,790 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:46:59,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:46:59,994 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:46:59,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:46:59,994 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 88 times [2019-12-26 20:46:59,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:46:59,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282072050] [2019-12-26 20:46:59,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:46:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:00,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282072050] [2019-12-26 20:47:00,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793162967] [2019-12-26 20:47:00,071 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 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 [2019-12-26 20:47:00,111 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:47:00,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:00,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:47:00,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:00,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:00,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:47:00,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918004075] [2019-12-26 20:47:00,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:47:00,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:00,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:47:00,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:47:00,199 INFO L87 Difference]: Start difference. First operand 158 states and 389 transitions. Second operand 16 states. [2019-12-26 20:47:00,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:00,565 INFO L93 Difference]: Finished difference Result 245 states and 557 transitions. [2019-12-26 20:47:00,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:47:00,565 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:47:00,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:00,567 INFO L225 Difference]: With dead ends: 245 [2019-12-26 20:47:00,567 INFO L226 Difference]: Without dead ends: 243 [2019-12-26 20:47:00,567 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:47:00,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-26 20:47:00,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 159. [2019-12-26 20:47:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-26 20:47:00,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 393 transitions. [2019-12-26 20:47:00,572 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 393 transitions. Word has length 13 [2019-12-26 20:47:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:00,572 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 393 transitions. [2019-12-26 20:47:00,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:47:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 393 transitions. [2019-12-26 20:47:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:47:00,573 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:00,573 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:00,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:00,774 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:00,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:00,775 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 89 times [2019-12-26 20:47:00,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:00,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574234270] [2019-12-26 20:47:00,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:00,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574234270] [2019-12-26 20:47:00,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236268133] [2019-12-26 20:47:00,843 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 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 [2019-12-26 20:47:00,884 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:47:00,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:00,885 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:47:00,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:01,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:01,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:47:01,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170398865] [2019-12-26 20:47:01,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:47:01,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:01,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:47:01,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:47:01,020 INFO L87 Difference]: Start difference. First operand 159 states and 393 transitions. Second operand 16 states. [2019-12-26 20:47:01,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:01,329 INFO L93 Difference]: Finished difference Result 235 states and 542 transitions. [2019-12-26 20:47:01,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:47:01,329 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:47:01,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:01,330 INFO L225 Difference]: With dead ends: 235 [2019-12-26 20:47:01,330 INFO L226 Difference]: Without dead ends: 234 [2019-12-26 20:47:01,331 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 [2019-12-26 20:47:01,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-12-26 20:47:01,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 160. [2019-12-26 20:47:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-26 20:47:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 397 transitions. [2019-12-26 20:47:01,336 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 397 transitions. Word has length 13 [2019-12-26 20:47:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:01,336 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 397 transitions. [2019-12-26 20:47:01,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:47:01,336 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 397 transitions. [2019-12-26 20:47:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:47:01,337 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:01,337 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:01,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:01,540 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:01,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:01,541 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 90 times [2019-12-26 20:47:01,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:01,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519069478] [2019-12-26 20:47:01,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:01,612 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519069478] [2019-12-26 20:47:01,612 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363634074] [2019-12-26 20:47:01,612 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 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 [2019-12-26 20:47:01,655 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:47:01,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:01,657 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:47:01,657 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:01,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:01,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:47:01,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474865613] [2019-12-26 20:47:01,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:47:01,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:01,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:47:01,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:47:01,744 INFO L87 Difference]: Start difference. First operand 160 states and 397 transitions. Second operand 16 states. [2019-12-26 20:47:02,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:02,153 INFO L93 Difference]: Finished difference Result 239 states and 550 transitions. [2019-12-26 20:47:02,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:47:02,153 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:47:02,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:02,155 INFO L225 Difference]: With dead ends: 239 [2019-12-26 20:47:02,155 INFO L226 Difference]: Without dead ends: 237 [2019-12-26 20:47:02,155 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 [2019-12-26 20:47:02,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-26 20:47:02,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 159. [2019-12-26 20:47:02,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-26 20:47:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 393 transitions. [2019-12-26 20:47:02,159 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 393 transitions. Word has length 13 [2019-12-26 20:47:02,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:02,160 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 393 transitions. [2019-12-26 20:47:02,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:47:02,160 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 393 transitions. [2019-12-26 20:47:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:47:02,160 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:02,161 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:02,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:02,362 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:02,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:02,363 INFO L82 PathProgramCache]: Analyzing trace with hash -721023787, now seen corresponding path program 91 times [2019-12-26 20:47:02,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:02,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280488563] [2019-12-26 20:47:02,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:02,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280488563] [2019-12-26 20:47:02,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860717660] [2019-12-26 20:47:02,444 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 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 [2019-12-26 20:47:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:02,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:47:02,493 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:02,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:02,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:47:02,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956850175] [2019-12-26 20:47:02,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:47:02,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:02,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:47:02,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:47:02,614 INFO L87 Difference]: Start difference. First operand 159 states and 393 transitions. Second operand 16 states. [2019-12-26 20:47:03,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:03,117 INFO L93 Difference]: Finished difference Result 240 states and 547 transitions. [2019-12-26 20:47:03,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:47:03,117 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:47:03,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:03,118 INFO L225 Difference]: With dead ends: 240 [2019-12-26 20:47:03,119 INFO L226 Difference]: Without dead ends: 239 [2019-12-26 20:47:03,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:47:03,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-12-26 20:47:03,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 158. [2019-12-26 20:47:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-26 20:47:03,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 389 transitions. [2019-12-26 20:47:03,123 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 389 transitions. Word has length 13 [2019-12-26 20:47:03,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:03,124 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 389 transitions. [2019-12-26 20:47:03,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:47:03,124 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 389 transitions. [2019-12-26 20:47:03,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:47:03,124 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:03,125 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:03,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:03,328 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:03,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:03,328 INFO L82 PathProgramCache]: Analyzing trace with hash -721028437, now seen corresponding path program 92 times [2019-12-26 20:47:03,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:03,329 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807298025] [2019-12-26 20:47:03,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:03,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807298025] [2019-12-26 20:47:03,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933313745] [2019-12-26 20:47:03,398 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 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 [2019-12-26 20:47:03,440 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:47:03,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:03,441 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:47:03,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:03,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:03,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:47:03,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563837705] [2019-12-26 20:47:03,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:47:03,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:03,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:47:03,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=168, Unknown=1, NotChecked=0, Total=240 [2019-12-26 20:47:03,989 INFO L87 Difference]: Start difference. First operand 158 states and 389 transitions. Second operand 16 states. [2019-12-26 20:47:05,131 WARN L192 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-26 20:47:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:05,399 INFO L93 Difference]: Finished difference Result 240 states and 544 transitions. [2019-12-26 20:47:05,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:47:05,399 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:47:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:05,400 INFO L225 Difference]: With dead ends: 240 [2019-12-26 20:47:05,400 INFO L226 Difference]: Without dead ends: 239 [2019-12-26 20:47:05,401 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=297, Invalid=572, Unknown=1, NotChecked=0, Total=870 [2019-12-26 20:47:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-12-26 20:47:05,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 156. [2019-12-26 20:47:05,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-26 20:47:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2019-12-26 20:47:05,405 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 13 [2019-12-26 20:47:05,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:05,405 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2019-12-26 20:47:05,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:47:05,405 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2019-12-26 20:47:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:47:05,406 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:05,406 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:05,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:05,609 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:05,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:05,610 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 93 times [2019-12-26 20:47:05,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:05,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85678604] [2019-12-26 20:47:05,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:05,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85678604] [2019-12-26 20:47:05,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263454060] [2019-12-26 20:47:05,680 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 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 [2019-12-26 20:47:05,721 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:47:05,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:05,722 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:47:05,723 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:05,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:05,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-26 20:47:05,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32438902] [2019-12-26 20:47:05,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:47:05,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:05,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:47:05,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:47:05,837 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 16 states. [2019-12-26 20:47:06,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:06,104 INFO L93 Difference]: Finished difference Result 179 states and 409 transitions. [2019-12-26 20:47:06,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:47:06,105 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-26 20:47:06,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:06,105 INFO L225 Difference]: With dead ends: 179 [2019-12-26 20:47:06,106 INFO L226 Difference]: Without dead ends: 178 [2019-12-26 20:47:06,106 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 [2019-12-26 20:47:06,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-26 20:47:06,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 156. [2019-12-26 20:47:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-26 20:47:06,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 369 transitions. [2019-12-26 20:47:06,110 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 369 transitions. Word has length 13 [2019-12-26 20:47:06,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:06,110 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 369 transitions. [2019-12-26 20:47:06,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:47:06,110 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 369 transitions. [2019-12-26 20:47:06,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:47:06,111 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:06,111 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:06,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:06,314 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:06,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:06,315 INFO L82 PathProgramCache]: Analyzing trace with hash -831836784, now seen corresponding path program 7 times [2019-12-26 20:47:06,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:06,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000593451] [2019-12-26 20:47:06,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:06,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000593451] [2019-12-26 20:47:06,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141053399] [2019-12-26 20:47:06,417 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 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 [2019-12-26 20:47:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:06,457 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:47:06,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:06,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-26 20:47:06,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2019-12-26 20:47:06,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17774011] [2019-12-26 20:47:06,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-26 20:47:06,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:06,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-26 20:47:06,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-12-26 20:47:06,520 INFO L87 Difference]: Start difference. First operand 156 states and 369 transitions. Second operand 9 states. [2019-12-26 20:47:06,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:06,546 INFO L93 Difference]: Finished difference Result 206 states and 491 transitions. [2019-12-26 20:47:06,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:47:06,547 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-26 20:47:06,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:06,548 INFO L225 Difference]: With dead ends: 206 [2019-12-26 20:47:06,548 INFO L226 Difference]: Without dead ends: 198 [2019-12-26 20:47:06,548 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-12-26 20:47:06,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-26 20:47:06,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2019-12-26 20:47:06,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-12-26 20:47:06,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 476 transitions. [2019-12-26 20:47:06,552 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 476 transitions. Word has length 13 [2019-12-26 20:47:06,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:06,552 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 476 transitions. [2019-12-26 20:47:06,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-26 20:47:06,553 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 476 transitions. [2019-12-26 20:47:06,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:06,553 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:06,553 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:06,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:06,754 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:06,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:06,755 INFO L82 PathProgramCache]: Analyzing trace with hash 801671507, now seen corresponding path program 94 times [2019-12-26 20:47:06,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:06,755 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120113679] [2019-12-26 20:47:06,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:06,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120113679] [2019-12-26 20:47:06,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146829293] [2019-12-26 20:47:06,832 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 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 [2019-12-26 20:47:06,878 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:47:06,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:06,879 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:06,879 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:06,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:06,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:06,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048135769] [2019-12-26 20:47:06,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:06,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:06,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:06,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:06,996 INFO L87 Difference]: Start difference. First operand 198 states and 476 transitions. Second operand 18 states. [2019-12-26 20:47:07,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:07,210 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2019-12-26 20:47:07,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:47:07,210 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:07,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:07,211 INFO L225 Difference]: With dead ends: 215 [2019-12-26 20:47:07,211 INFO L226 Difference]: Without dead ends: 213 [2019-12-26 20:47:07,211 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:47:07,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-26 20:47:07,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2019-12-26 20:47:07,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-12-26 20:47:07,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 474 transitions. [2019-12-26 20:47:07,216 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 474 transitions. Word has length 14 [2019-12-26 20:47:07,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:07,216 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 474 transitions. [2019-12-26 20:47:07,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:07,217 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 474 transitions. [2019-12-26 20:47:07,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:07,217 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:07,217 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:07,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:07,421 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:07,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:07,421 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 95 times [2019-12-26 20:47:07,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:07,422 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607590927] [2019-12-26 20:47:07,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:07,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607590927] [2019-12-26 20:47:07,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225728188] [2019-12-26 20:47:07,503 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 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 [2019-12-26 20:47:07,548 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:47:07,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:07,549 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:07,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:07,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:07,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:07,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669003102] [2019-12-26 20:47:07,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:07,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:07,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:07,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:07,662 INFO L87 Difference]: Start difference. First operand 196 states and 474 transitions. Second operand 18 states. [2019-12-26 20:47:07,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:07,868 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2019-12-26 20:47:07,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:47:07,868 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:07,870 INFO L225 Difference]: With dead ends: 227 [2019-12-26 20:47:07,870 INFO L226 Difference]: Without dead ends: 226 [2019-12-26 20:47:07,870 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 [2019-12-26 20:47:07,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-26 20:47:07,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 198. [2019-12-26 20:47:07,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-12-26 20:47:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 482 transitions. [2019-12-26 20:47:07,874 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 482 transitions. Word has length 14 [2019-12-26 20:47:07,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:07,875 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 482 transitions. [2019-12-26 20:47:07,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:07,875 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 482 transitions. [2019-12-26 20:47:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:07,875 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:07,876 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:08,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:08,079 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:08,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:08,079 INFO L82 PathProgramCache]: Analyzing trace with hash 801704987, now seen corresponding path program 96 times [2019-12-26 20:47:08,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:08,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832244934] [2019-12-26 20:47:08,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:08,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832244934] [2019-12-26 20:47:08,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485803729] [2019-12-26 20:47:08,190 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 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 [2019-12-26 20:47:08,234 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:47:08,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:08,234 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-26 20:47:08,235 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:08,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:08,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:08,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296916355] [2019-12-26 20:47:08,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:08,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:08,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:08,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:08,364 INFO L87 Difference]: Start difference. First operand 198 states and 482 transitions. Second operand 18 states. [2019-12-26 20:47:08,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:08,601 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2019-12-26 20:47:08,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:47:08,602 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:08,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:08,603 INFO L225 Difference]: With dead ends: 225 [2019-12-26 20:47:08,603 INFO L226 Difference]: Without dead ends: 222 [2019-12-26 20:47:08,604 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:47:08,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-26 20:47:08,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 198. [2019-12-26 20:47:08,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-12-26 20:47:08,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 481 transitions. [2019-12-26 20:47:08,609 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 481 transitions. Word has length 14 [2019-12-26 20:47:08,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:08,610 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 481 transitions. [2019-12-26 20:47:08,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:08,610 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 481 transitions. [2019-12-26 20:47:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:08,610 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:08,610 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:08,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:08,814 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:08,815 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 97 times [2019-12-26 20:47:08,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:08,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059763163] [2019-12-26 20:47:08,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:08,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059763163] [2019-12-26 20:47:08,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999530263] [2019-12-26 20:47:08,895 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 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 [2019-12-26 20:47:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:08,937 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:08,938 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:09,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:09,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:09,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415128929] [2019-12-26 20:47:09,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:09,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:09,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:09,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:09,043 INFO L87 Difference]: Start difference. First operand 198 states and 481 transitions. Second operand 18 states. [2019-12-26 20:47:09,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:09,268 INFO L93 Difference]: Finished difference Result 235 states and 552 transitions. [2019-12-26 20:47:09,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:47:09,269 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:09,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:09,270 INFO L225 Difference]: With dead ends: 235 [2019-12-26 20:47:09,270 INFO L226 Difference]: Without dead ends: 234 [2019-12-26 20:47:09,270 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:47:09,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-12-26 20:47:09,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2019-12-26 20:47:09,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-12-26 20:47:09,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 489 transitions. [2019-12-26 20:47:09,274 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 489 transitions. Word has length 14 [2019-12-26 20:47:09,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:09,275 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 489 transitions. [2019-12-26 20:47:09,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:09,275 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 489 transitions. [2019-12-26 20:47:09,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:09,275 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:09,275 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:09,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:09,476 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:09,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:09,476 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 98 times [2019-12-26 20:47:09,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:09,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502138041] [2019-12-26 20:47:09,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:09,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502138041] [2019-12-26 20:47:09,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846791371] [2019-12-26 20:47:09,552 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 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 [2019-12-26 20:47:09,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:47:09,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:09,596 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:09,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:10,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:10,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:10,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601206379] [2019-12-26 20:47:10,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:10,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:10,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:10,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=202, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:47:10,192 INFO L87 Difference]: Start difference. First operand 200 states and 489 transitions. Second operand 18 states. [2019-12-26 20:47:10,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:10,465 INFO L93 Difference]: Finished difference Result 250 states and 583 transitions. [2019-12-26 20:47:10,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:47:10,466 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:10,466 INFO L225 Difference]: With dead ends: 250 [2019-12-26 20:47:10,466 INFO L226 Difference]: Without dead ends: 249 [2019-12-26 20:47:10,467 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=409, Unknown=1, NotChecked=0, Total=650 [2019-12-26 20:47:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-26 20:47:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 200. [2019-12-26 20:47:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-12-26 20:47:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 489 transitions. [2019-12-26 20:47:10,471 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 489 transitions. Word has length 14 [2019-12-26 20:47:10,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:10,471 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 489 transitions. [2019-12-26 20:47:10,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:10,471 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 489 transitions. [2019-12-26 20:47:10,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:10,472 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:10,472 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:10,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:10,675 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:10,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:10,676 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 99 times [2019-12-26 20:47:10,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:10,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958740804] [2019-12-26 20:47:10,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:10,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958740804] [2019-12-26 20:47:10,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496411084] [2019-12-26 20:47:10,768 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 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 [2019-12-26 20:47:10,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:47:10,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:10,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:10,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:11,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:11,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:11,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82411978] [2019-12-26 20:47:11,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:11,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:11,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:11,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=201, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:47:11,459 INFO L87 Difference]: Start difference. First operand 200 states and 489 transitions. Second operand 18 states. [2019-12-26 20:47:11,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:11,947 INFO L93 Difference]: Finished difference Result 260 states and 602 transitions. [2019-12-26 20:47:11,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:47:11,948 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:11,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:11,949 INFO L225 Difference]: With dead ends: 260 [2019-12-26 20:47:11,949 INFO L226 Difference]: Without dead ends: 259 [2019-12-26 20:47:11,949 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=247, Invalid=454, Unknown=1, NotChecked=0, Total=702 [2019-12-26 20:47:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-12-26 20:47:11,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 199. [2019-12-26 20:47:11,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-26 20:47:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 486 transitions. [2019-12-26 20:47:11,954 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 486 transitions. Word has length 14 [2019-12-26 20:47:11,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:11,954 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 486 transitions. [2019-12-26 20:47:11,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:11,955 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 486 transitions. [2019-12-26 20:47:11,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:11,955 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:11,955 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:12,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:12,157 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:12,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:12,158 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 100 times [2019-12-26 20:47:12,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:12,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433673850] [2019-12-26 20:47:12,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:12,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433673850] [2019-12-26 20:47:12,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833609122] [2019-12-26 20:47:12,240 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 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 [2019-12-26 20:47:12,282 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:47:12,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:12,283 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:12,284 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:12,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:12,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:12,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334448945] [2019-12-26 20:47:12,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:12,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:12,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:12,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:12,390 INFO L87 Difference]: Start difference. First operand 199 states and 486 transitions. Second operand 18 states. [2019-12-26 20:47:12,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:12,606 INFO L93 Difference]: Finished difference Result 238 states and 562 transitions. [2019-12-26 20:47:12,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:47:12,606 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:12,607 INFO L225 Difference]: With dead ends: 238 [2019-12-26 20:47:12,607 INFO L226 Difference]: Without dead ends: 237 [2019-12-26 20:47:12,608 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 [2019-12-26 20:47:12,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-26 20:47:12,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 203. [2019-12-26 20:47:12,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-26 20:47:12,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 502 transitions. [2019-12-26 20:47:12,612 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 502 transitions. Word has length 14 [2019-12-26 20:47:12,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:12,612 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 502 transitions. [2019-12-26 20:47:12,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:12,612 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 502 transitions. [2019-12-26 20:47:12,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:12,612 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:12,612 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:12,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:12,813 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:12,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:12,814 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 101 times [2019-12-26 20:47:12,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:12,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536379877] [2019-12-26 20:47:12,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:12,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536379877] [2019-12-26 20:47:12,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85079115] [2019-12-26 20:47:12,891 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 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 [2019-12-26 20:47:12,936 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:47:12,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:12,937 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:12,937 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:14,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:14,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:14,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839376657] [2019-12-26 20:47:14,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:14,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:14,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:14,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:14,648 INFO L87 Difference]: Start difference. First operand 203 states and 502 transitions. Second operand 18 states. [2019-12-26 20:47:15,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:15,036 INFO L93 Difference]: Finished difference Result 275 states and 640 transitions. [2019-12-26 20:47:15,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:47:15,037 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:15,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:15,038 INFO L225 Difference]: With dead ends: 275 [2019-12-26 20:47:15,038 INFO L226 Difference]: Without dead ends: 274 [2019-12-26 20:47:15,038 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:47:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-12-26 20:47:15,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 203. [2019-12-26 20:47:15,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-26 20:47:15,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 502 transitions. [2019-12-26 20:47:15,043 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 502 transitions. Word has length 14 [2019-12-26 20:47:15,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:15,043 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 502 transitions. [2019-12-26 20:47:15,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:15,043 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 502 transitions. [2019-12-26 20:47:15,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:15,043 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:15,043 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:15,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:15,244 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:15,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:15,245 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 102 times [2019-12-26 20:47:15,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:15,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276727809] [2019-12-26 20:47:15,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:15,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276727809] [2019-12-26 20:47:15,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741837874] [2019-12-26 20:47:15,328 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 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 [2019-12-26 20:47:15,371 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:47:15,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:15,373 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:15,373 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:16,261 WARN L192 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:47:16,862 WARN L192 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-26 20:47:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:16,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:16,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:16,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729306391] [2019-12-26 20:47:16,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:16,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:16,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:16,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:16,864 INFO L87 Difference]: Start difference. First operand 203 states and 502 transitions. Second operand 18 states. [2019-12-26 20:47:17,989 WARN L192 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-12-26 20:47:18,554 WARN L192 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-26 20:47:19,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:19,121 INFO L93 Difference]: Finished difference Result 285 states and 656 transitions. [2019-12-26 20:47:19,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:47:19,122 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:19,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:19,123 INFO L225 Difference]: With dead ends: 285 [2019-12-26 20:47:19,123 INFO L226 Difference]: Without dead ends: 284 [2019-12-26 20:47:19,123 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=258, Invalid=498, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:47:19,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2019-12-26 20:47:19,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 204. [2019-12-26 20:47:19,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-12-26 20:47:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 506 transitions. [2019-12-26 20:47:19,126 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 506 transitions. Word has length 14 [2019-12-26 20:47:19,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:19,126 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 506 transitions. [2019-12-26 20:47:19,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:19,126 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 506 transitions. [2019-12-26 20:47:19,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:19,127 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:19,127 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:19,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:19,327 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:19,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:19,328 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 103 times [2019-12-26 20:47:19,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:19,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916365780] [2019-12-26 20:47:19,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:19,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916365780] [2019-12-26 20:47:19,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012673310] [2019-12-26 20:47:19,409 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 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 [2019-12-26 20:47:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:19,454 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:19,455 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:20,462 WARN L192 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:47:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:20,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:20,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:20,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075144173] [2019-12-26 20:47:20,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:20,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:20,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:20,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:20,740 INFO L87 Difference]: Start difference. First operand 204 states and 506 transitions. Second operand 18 states. [2019-12-26 20:47:21,764 WARN L192 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-26 20:47:22,204 WARN L192 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-12-26 20:47:22,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:22,872 INFO L93 Difference]: Finished difference Result 275 states and 640 transitions. [2019-12-26 20:47:22,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:47:22,873 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:22,874 INFO L225 Difference]: With dead ends: 275 [2019-12-26 20:47:22,874 INFO L226 Difference]: Without dead ends: 269 [2019-12-26 20:47:22,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=321, Invalid=548, Unknown=1, NotChecked=0, Total=870 [2019-12-26 20:47:22,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-12-26 20:47:22,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 205. [2019-12-26 20:47:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-26 20:47:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 507 transitions. [2019-12-26 20:47:22,879 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 507 transitions. Word has length 14 [2019-12-26 20:47:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:22,879 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 507 transitions. [2019-12-26 20:47:22,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 507 transitions. [2019-12-26 20:47:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:22,880 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:22,880 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:23,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:23,081 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:23,081 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 104 times [2019-12-26 20:47:23,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:23,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628307468] [2019-12-26 20:47:23,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:23,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628307468] [2019-12-26 20:47:23,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965928569] [2019-12-26 20:47:23,160 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:47:23,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:47:23,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:23,204 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:23,205 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:24,387 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-26 20:47:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:24,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:24,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:24,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413382249] [2019-12-26 20:47:24,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:24,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:24,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:24,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=206, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:47:24,434 INFO L87 Difference]: Start difference. First operand 205 states and 507 transitions. Second operand 18 states. [2019-12-26 20:47:24,708 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-26 20:47:24,956 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-26 20:47:26,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:26,181 INFO L93 Difference]: Finished difference Result 278 states and 646 transitions. [2019-12-26 20:47:26,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:47:26,181 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:26,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:26,182 INFO L225 Difference]: With dead ends: 278 [2019-12-26 20:47:26,182 INFO L226 Difference]: Without dead ends: 277 [2019-12-26 20:47:26,183 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=264, Invalid=490, Unknown=2, NotChecked=0, Total=756 [2019-12-26 20:47:26,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2019-12-26 20:47:26,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 206. [2019-12-26 20:47:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-12-26 20:47:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 511 transitions. [2019-12-26 20:47:26,187 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 511 transitions. Word has length 14 [2019-12-26 20:47:26,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:26,187 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 511 transitions. [2019-12-26 20:47:26,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:26,187 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 511 transitions. [2019-12-26 20:47:26,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:26,187 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:26,187 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:26,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:26,388 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:26,389 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 105 times [2019-12-26 20:47:26,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:26,389 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589057512] [2019-12-26 20:47:26,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:26,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589057512] [2019-12-26 20:47:26,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055239081] [2019-12-26 20:47:26,490 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 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 [2019-12-26 20:47:26,532 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:47:26,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:26,533 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:26,533 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:27,895 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_340 Int)) (and (<= c_~j~0 (+ (* 2 v_~j~0_340) 1)) (<= (div (+ (* v_~j~0_340 (- 1)) 1) (- 3)) 1) (<= c_~i~0 (+ v_~j~0_340 c_~j~0 1)))) is different from true [2019-12-26 20:47:28,842 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_340 Int)) (and (<= c_~j~0 (+ (* 2 v_~j~0_340) c_~i~0 1)) (<= c_~i~0 (+ (* 3 v_~j~0_340) 2)) (<= (div (+ (* v_~j~0_340 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-26 20:47:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2019-12-26 20:47:28,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:28,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:28,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774459847] [2019-12-26 20:47:28,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:28,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:28,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:28,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=151, Unknown=2, NotChecked=58, Total=306 [2019-12-26 20:47:28,846 INFO L87 Difference]: Start difference. First operand 206 states and 511 transitions. Second operand 18 states. [2019-12-26 20:47:29,212 WARN L192 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2019-12-26 20:47:29,629 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2019-12-26 20:47:30,633 WARN L192 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-26 20:47:31,722 WARN L192 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2019-12-26 20:47:32,715 WARN L192 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-26 20:47:32,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:32,727 INFO L93 Difference]: Finished difference Result 298 states and 706 transitions. [2019-12-26 20:47:32,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:47:32,728 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:32,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:32,729 INFO L225 Difference]: With dead ends: 298 [2019-12-26 20:47:32,729 INFO L226 Difference]: Without dead ends: 297 [2019-12-26 20:47:32,729 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=288, Invalid=473, Unknown=3, NotChecked=106, Total=870 [2019-12-26 20:47:32,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2019-12-26 20:47:32,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 205. [2019-12-26 20:47:32,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-26 20:47:32,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 507 transitions. [2019-12-26 20:47:32,733 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 507 transitions. Word has length 14 [2019-12-26 20:47:32,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:32,733 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 507 transitions. [2019-12-26 20:47:32,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 507 transitions. [2019-12-26 20:47:32,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:32,734 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:32,734 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:32,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:32,935 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:32,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:32,935 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 106 times [2019-12-26 20:47:32,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:32,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794407598] [2019-12-26 20:47:32,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:33,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794407598] [2019-12-26 20:47:33,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257572056] [2019-12-26 20:47:33,021 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 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 [2019-12-26 20:47:33,067 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:47:33,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:33,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:33,068 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:35,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:35,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:35,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190036717] [2019-12-26 20:47:35,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:35,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:35,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:35,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=198, Unknown=3, NotChecked=0, Total=306 [2019-12-26 20:47:35,419 INFO L87 Difference]: Start difference. First operand 205 states and 507 transitions. Second operand 18 states. [2019-12-26 20:47:36,528 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-12-26 20:47:38,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:38,649 INFO L93 Difference]: Finished difference Result 266 states and 623 transitions. [2019-12-26 20:47:38,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:47:38,649 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:38,650 INFO L225 Difference]: With dead ends: 266 [2019-12-26 20:47:38,650 INFO L226 Difference]: Without dead ends: 265 [2019-12-26 20:47:38,651 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=273, Invalid=479, Unknown=4, NotChecked=0, Total=756 [2019-12-26 20:47:38,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-26 20:47:38,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 203. [2019-12-26 20:47:38,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-26 20:47:38,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 501 transitions. [2019-12-26 20:47:38,655 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 501 transitions. Word has length 14 [2019-12-26 20:47:38,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:38,655 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 501 transitions. [2019-12-26 20:47:38,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:38,656 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 501 transitions. [2019-12-26 20:47:38,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:38,656 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:38,656 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:38,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:38,859 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:38,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:38,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091347, now seen corresponding path program 107 times [2019-12-26 20:47:38,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:38,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963191200] [2019-12-26 20:47:38,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:38,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963191200] [2019-12-26 20:47:38,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341654456] [2019-12-26 20:47:38,944 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 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 [2019-12-26 20:47:38,993 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:47:38,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:38,994 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:38,995 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:39,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:39,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:39,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755968105] [2019-12-26 20:47:39,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:39,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:39,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:39,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:39,108 INFO L87 Difference]: Start difference. First operand 203 states and 501 transitions. Second operand 18 states. [2019-12-26 20:47:39,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:39,304 INFO L93 Difference]: Finished difference Result 236 states and 565 transitions. [2019-12-26 20:47:39,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:47:39,304 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:39,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:39,305 INFO L225 Difference]: With dead ends: 236 [2019-12-26 20:47:39,306 INFO L226 Difference]: Without dead ends: 235 [2019-12-26 20:47:39,306 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 [2019-12-26 20:47:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-26 20:47:39,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2019-12-26 20:47:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-26 20:47:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-26 20:47:39,310 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-26 20:47:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:39,310 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-26 20:47:39,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:39,310 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-26 20:47:39,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:39,311 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:39,311 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:39,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:39,512 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:39,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:39,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091192, now seen corresponding path program 108 times [2019-12-26 20:47:39,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:39,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459951863] [2019-12-26 20:47:39,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:39,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459951863] [2019-12-26 20:47:39,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726362656] [2019-12-26 20:47:39,594 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 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 [2019-12-26 20:47:39,641 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:47:39,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:39,643 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-26 20:47:39,643 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:39,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:39,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:39,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942341607] [2019-12-26 20:47:39,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:39,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:39,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:39,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:39,746 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 18 states. [2019-12-26 20:47:39,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:39,999 INFO L93 Difference]: Finished difference Result 282 states and 657 transitions. [2019-12-26 20:47:39,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:47:39,999 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:39,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:40,000 INFO L225 Difference]: With dead ends: 282 [2019-12-26 20:47:40,001 INFO L226 Difference]: Without dead ends: 281 [2019-12-26 20:47:40,001 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:47:40,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-12-26 20:47:40,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 208. [2019-12-26 20:47:40,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-26 20:47:40,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-26 20:47:40,005 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-26 20:47:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:40,006 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-26 20:47:40,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:40,006 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-26 20:47:40,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:40,006 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:40,006 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:40,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:40,210 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:40,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:40,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 109 times [2019-12-26 20:47:40,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:40,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562481026] [2019-12-26 20:47:40,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:40,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562481026] [2019-12-26 20:47:40,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575574777] [2019-12-26 20:47:40,288 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 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 [2019-12-26 20:47:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:40,329 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:40,330 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:40,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:40,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:40,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069578947] [2019-12-26 20:47:40,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:40,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:40,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:40,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:40,451 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 18 states. [2019-12-26 20:47:40,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:40,887 INFO L93 Difference]: Finished difference Result 310 states and 719 transitions. [2019-12-26 20:47:40,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:47:40,888 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:40,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:40,889 INFO L225 Difference]: With dead ends: 310 [2019-12-26 20:47:40,889 INFO L226 Difference]: Without dead ends: 309 [2019-12-26 20:47:40,889 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=540, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:47:40,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2019-12-26 20:47:40,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 209. [2019-12-26 20:47:40,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-12-26 20:47:40,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 525 transitions. [2019-12-26 20:47:40,893 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 525 transitions. Word has length 14 [2019-12-26 20:47:40,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:40,894 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 525 transitions. [2019-12-26 20:47:40,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:40,894 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 525 transitions. [2019-12-26 20:47:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:40,894 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:40,894 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:41,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:41,095 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:41,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 110 times [2019-12-26 20:47:41,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:41,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778446601] [2019-12-26 20:47:41,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:41,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778446601] [2019-12-26 20:47:41,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094083668] [2019-12-26 20:47:41,206 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 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 [2019-12-26 20:47:41,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:47:41,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:41,258 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:41,259 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:41,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:41,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:41,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590918569] [2019-12-26 20:47:41,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:41,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:41,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:41,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:41,471 INFO L87 Difference]: Start difference. First operand 209 states and 525 transitions. Second operand 18 states. [2019-12-26 20:47:41,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:41,933 INFO L93 Difference]: Finished difference Result 288 states and 675 transitions. [2019-12-26 20:47:41,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:47:41,933 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:41,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:41,934 INFO L225 Difference]: With dead ends: 288 [2019-12-26 20:47:41,935 INFO L226 Difference]: Without dead ends: 287 [2019-12-26 20:47:41,935 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 [2019-12-26 20:47:41,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2019-12-26 20:47:41,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 208. [2019-12-26 20:47:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-26 20:47:41,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-26 20:47:41,938 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-26 20:47:41,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:41,939 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-26 20:47:41,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:41,939 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-26 20:47:41,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:41,939 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:41,939 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:42,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:42,140 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:42,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:42,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 111 times [2019-12-26 20:47:42,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:42,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961810667] [2019-12-26 20:47:42,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:42,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961810667] [2019-12-26 20:47:42,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160773623] [2019-12-26 20:47:42,224 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 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 [2019-12-26 20:47:42,265 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:47:42,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:42,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-26 20:47:42,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:42,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:42,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:42,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695916544] [2019-12-26 20:47:42,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:42,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:42,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:42,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:42,414 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 18 states. [2019-12-26 20:47:43,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:43,174 INFO L93 Difference]: Finished difference Result 336 states and 770 transitions. [2019-12-26 20:47:43,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:47:43,174 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:43,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:43,176 INFO L225 Difference]: With dead ends: 336 [2019-12-26 20:47:43,176 INFO L226 Difference]: Without dead ends: 326 [2019-12-26 20:47:43,177 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=342, Invalid=780, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:47:43,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-12-26 20:47:43,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 218. [2019-12-26 20:47:43,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-26 20:47:43,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 552 transitions. [2019-12-26 20:47:43,182 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 552 transitions. Word has length 14 [2019-12-26 20:47:43,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:43,182 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 552 transitions. [2019-12-26 20:47:43,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:43,183 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 552 transitions. [2019-12-26 20:47:43,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:43,183 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:43,183 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:43,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:43,387 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:43,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:43,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 112 times [2019-12-26 20:47:43,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:43,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482117053] [2019-12-26 20:47:43,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:43,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482117053] [2019-12-26 20:47:43,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946579286] [2019-12-26 20:47:43,468 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 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 [2019-12-26 20:47:43,516 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:47:43,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:43,517 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:43,517 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:43,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:43,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:43,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093895070] [2019-12-26 20:47:43,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:43,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:43,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:43,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:47:43,699 INFO L87 Difference]: Start difference. First operand 218 states and 552 transitions. Second operand 18 states. [2019-12-26 20:47:44,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:47:44,234 INFO L93 Difference]: Finished difference Result 333 states and 775 transitions. [2019-12-26 20:47:44,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:47:44,235 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:47:44,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:47:44,236 INFO L225 Difference]: With dead ends: 333 [2019-12-26 20:47:44,236 INFO L226 Difference]: Without dead ends: 331 [2019-12-26 20:47:44,237 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=568, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:47:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2019-12-26 20:47:44,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 220. [2019-12-26 20:47:44,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-12-26 20:47:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 560 transitions. [2019-12-26 20:47:44,242 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 560 transitions. Word has length 14 [2019-12-26 20:47:44,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:47:44,242 INFO L462 AbstractCegarLoop]: Abstraction has 220 states and 560 transitions. [2019-12-26 20:47:44,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:47:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 560 transitions. [2019-12-26 20:47:44,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:47:44,243 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:47:44,243 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:47:44,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:47:44,447 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:47:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:47:44,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 113 times [2019-12-26 20:47:44,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:47:44,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155804371] [2019-12-26 20:47:44,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:47:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:47:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:44,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155804371] [2019-12-26 20:47:44,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930621183] [2019-12-26 20:47:44,532 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 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 [2019-12-26 20:47:44,576 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-26 20:47:44,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:47:44,577 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:47:44,578 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:47:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:47:45,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:47:45,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:47:45,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716685589] [2019-12-26 20:47:45,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:47:45,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:47:45,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:47:45,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=207, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:47:45,238 INFO L87 Difference]: Start difference. First operand 220 states and 560 transitions. Second operand 18 states. [2019-12-26 20:47:47,626 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-26 20:47:49,910 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2019-12-26 20:48:01,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:01,062 INFO L93 Difference]: Finished difference Result 330 states and 765 transitions. [2019-12-26 20:48:01,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:48:01,063 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:01,064 INFO L225 Difference]: With dead ends: 330 [2019-12-26 20:48:01,065 INFO L226 Difference]: Without dead ends: 328 [2019-12-26 20:48:01,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=338, Invalid=652, Unknown=2, NotChecked=0, Total=992 [2019-12-26 20:48:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-26 20:48:01,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 220. [2019-12-26 20:48:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-12-26 20:48:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 560 transitions. [2019-12-26 20:48:01,069 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 560 transitions. Word has length 14 [2019-12-26 20:48:01,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:01,070 INFO L462 AbstractCegarLoop]: Abstraction has 220 states and 560 transitions. [2019-12-26 20:48:01,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 560 transitions. [2019-12-26 20:48:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:01,070 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:01,070 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:01,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:01,271 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:01,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 114 times [2019-12-26 20:48:01,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:01,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596743397] [2019-12-26 20:48:01,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:01,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596743397] [2019-12-26 20:48:01,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50910127] [2019-12-26 20:48:01,372 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 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 [2019-12-26 20:48:01,416 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:48:01,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:01,417 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:01,418 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:01,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:01,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:01,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3983468] [2019-12-26 20:48:01,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:01,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:01,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:01,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:01,576 INFO L87 Difference]: Start difference. First operand 220 states and 560 transitions. Second operand 18 states. [2019-12-26 20:48:02,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:02,779 INFO L93 Difference]: Finished difference Result 287 states and 678 transitions. [2019-12-26 20:48:02,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:48:02,779 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:02,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:02,780 INFO L225 Difference]: With dead ends: 287 [2019-12-26 20:48:02,781 INFO L226 Difference]: Without dead ends: 286 [2019-12-26 20:48:02,781 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2019-12-26 20:48:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-12-26 20:48:02,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 222. [2019-12-26 20:48:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-26 20:48:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 568 transitions. [2019-12-26 20:48:02,787 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 568 transitions. Word has length 14 [2019-12-26 20:48:02,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:02,787 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 568 transitions. [2019-12-26 20:48:02,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:02,787 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 568 transitions. [2019-12-26 20:48:02,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:02,787 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:02,788 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:02,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:02,988 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:02,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 115 times [2019-12-26 20:48:02,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:02,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197085294] [2019-12-26 20:48:02,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:03,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197085294] [2019-12-26 20:48:03,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151429112] [2019-12-26 20:48:03,075 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 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 [2019-12-26 20:48:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:03,121 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:03,121 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:09,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:09,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:09,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893755645] [2019-12-26 20:48:09,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:09,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:09,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:09,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:09,647 INFO L87 Difference]: Start difference. First operand 222 states and 568 transitions. Second operand 18 states. [2019-12-26 20:48:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:15,001 INFO L93 Difference]: Finished difference Result 322 states and 757 transitions. [2019-12-26 20:48:15,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:48:15,002 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:15,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:15,003 INFO L225 Difference]: With dead ends: 322 [2019-12-26 20:48:15,003 INFO L226 Difference]: Without dead ends: 321 [2019-12-26 20:48:15,004 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=283, Invalid=529, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:48:15,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2019-12-26 20:48:15,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 221. [2019-12-26 20:48:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-26 20:48:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 564 transitions. [2019-12-26 20:48:15,009 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 564 transitions. Word has length 14 [2019-12-26 20:48:15,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:15,009 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 564 transitions. [2019-12-26 20:48:15,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:15,009 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 564 transitions. [2019-12-26 20:48:15,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:15,010 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:15,010 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:15,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:15,213 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:15,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:15,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 116 times [2019-12-26 20:48:15,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:15,214 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782918599] [2019-12-26 20:48:15,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:15,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782918599] [2019-12-26 20:48:15,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670985966] [2019-12-26 20:48:15,310 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 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 [2019-12-26 20:48:15,351 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:48:15,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:15,352 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:15,352 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:15,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:15,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:15,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712038121] [2019-12-26 20:48:15,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:15,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:15,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:15,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:15,549 INFO L87 Difference]: Start difference. First operand 221 states and 564 transitions. Second operand 18 states. [2019-12-26 20:48:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:16,062 INFO L93 Difference]: Finished difference Result 329 states and 769 transitions. [2019-12-26 20:48:16,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:48:16,063 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:16,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:16,064 INFO L225 Difference]: With dead ends: 329 [2019-12-26 20:48:16,064 INFO L226 Difference]: Without dead ends: 328 [2019-12-26 20:48:16,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=284, Invalid=528, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:48:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-26 20:48:16,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 222. [2019-12-26 20:48:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-26 20:48:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 568 transitions. [2019-12-26 20:48:16,070 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 568 transitions. Word has length 14 [2019-12-26 20:48:16,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:16,070 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 568 transitions. [2019-12-26 20:48:16,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:16,070 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 568 transitions. [2019-12-26 20:48:16,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:16,071 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:16,071 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:16,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:16,274 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:16,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 117 times [2019-12-26 20:48:16,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:16,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533248354] [2019-12-26 20:48:16,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:16,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533248354] [2019-12-26 20:48:16,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299491400] [2019-12-26 20:48:16,359 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:48:16,404 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:48:16,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:16,405 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:16,406 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:16,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:16,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:16,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297282823] [2019-12-26 20:48:16,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:16,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:16,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:16,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:16,635 INFO L87 Difference]: Start difference. First operand 222 states and 568 transitions. Second operand 18 states. [2019-12-26 20:48:17,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:17,786 INFO L93 Difference]: Finished difference Result 320 states and 748 transitions. [2019-12-26 20:48:17,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:48:17,787 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:17,788 INFO L225 Difference]: With dead ends: 320 [2019-12-26 20:48:17,788 INFO L226 Difference]: Without dead ends: 313 [2019-12-26 20:48:17,789 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=340, Invalid=590, Unknown=0, NotChecked=0, Total=930 [2019-12-26 20:48:17,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2019-12-26 20:48:17,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 219. [2019-12-26 20:48:17,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-12-26 20:48:17,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 553 transitions. [2019-12-26 20:48:17,792 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 553 transitions. Word has length 14 [2019-12-26 20:48:17,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:17,793 INFO L462 AbstractCegarLoop]: Abstraction has 219 states and 553 transitions. [2019-12-26 20:48:17,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:17,793 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 553 transitions. [2019-12-26 20:48:17,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:17,793 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:17,793 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:17,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:17,994 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:17,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:17,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 118 times [2019-12-26 20:48:17,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:17,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68979065] [2019-12-26 20:48:17,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:18,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68979065] [2019-12-26 20:48:18,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709561848] [2019-12-26 20:48:18,081 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 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 [2019-12-26 20:48:18,126 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:48:18,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:18,127 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:18,127 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:18,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:18,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:18,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215141647] [2019-12-26 20:48:18,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:18,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:18,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:18,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:18,340 INFO L87 Difference]: Start difference. First operand 219 states and 553 transitions. Second operand 18 states. [2019-12-26 20:48:20,680 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-26 20:48:20,956 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2019-12-26 20:48:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:25,838 INFO L93 Difference]: Finished difference Result 290 states and 689 transitions. [2019-12-26 20:48:25,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:48:25,838 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:25,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:25,839 INFO L225 Difference]: With dead ends: 290 [2019-12-26 20:48:25,839 INFO L226 Difference]: Without dead ends: 289 [2019-12-26 20:48:25,840 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=289, Invalid=580, Unknown=1, NotChecked=0, Total=870 [2019-12-26 20:48:25,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2019-12-26 20:48:25,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 216. [2019-12-26 20:48:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-26 20:48:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-26 20:48:25,848 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-26 20:48:25,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:25,849 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-26 20:48:25,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-26 20:48:25,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:25,849 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:25,849 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:26,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:26,050 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:26,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 119 times [2019-12-26 20:48:26,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:26,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238999016] [2019-12-26 20:48:26,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:26,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238999016] [2019-12-26 20:48:26,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861947303] [2019-12-26 20:48:26,136 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 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 [2019-12-26 20:48:26,182 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-26 20:48:26,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:26,183 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:26,184 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:26,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:26,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:26,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994123105] [2019-12-26 20:48:26,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:26,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:26,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:26,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:26,300 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-26 20:48:26,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:26,750 INFO L93 Difference]: Finished difference Result 268 states and 640 transitions. [2019-12-26 20:48:26,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:48:26,750 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:26,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:26,751 INFO L225 Difference]: With dead ends: 268 [2019-12-26 20:48:26,751 INFO L226 Difference]: Without dead ends: 267 [2019-12-26 20:48:26,752 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 [2019-12-26 20:48:26,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2019-12-26 20:48:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 216. [2019-12-26 20:48:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-26 20:48:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-26 20:48:26,755 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-26 20:48:26,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:26,756 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-26 20:48:26,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-26 20:48:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:26,756 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:26,756 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:26,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:26,959 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:26,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:26,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1460022991, now seen corresponding path program 120 times [2019-12-26 20:48:26,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:26,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253303583] [2019-12-26 20:48:26,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:27,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253303583] [2019-12-26 20:48:27,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109408823] [2019-12-26 20:48:27,046 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 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 [2019-12-26 20:48:27,089 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:48:27,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:27,091 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:27,092 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:27,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:27,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:27,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437939025] [2019-12-26 20:48:27,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:27,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:27,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:27,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:27,217 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-26 20:48:28,372 WARN L192 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2019-12-26 20:48:29,043 WARN L192 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-26 20:48:29,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:29,071 INFO L93 Difference]: Finished difference Result 284 states and 671 transitions. [2019-12-26 20:48:29,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:48:29,072 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:29,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:29,074 INFO L225 Difference]: With dead ends: 284 [2019-12-26 20:48:29,074 INFO L226 Difference]: Without dead ends: 283 [2019-12-26 20:48:29,074 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:48:29,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2019-12-26 20:48:29,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 216. [2019-12-26 20:48:29,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-26 20:48:29,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-26 20:48:29,080 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-26 20:48:29,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:29,080 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-26 20:48:29,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:29,080 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-26 20:48:29,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:29,081 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:29,081 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:29,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:29,285 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:29,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:29,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1460023146, now seen corresponding path program 121 times [2019-12-26 20:48:29,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:29,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854238427] [2019-12-26 20:48:29,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:29,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854238427] [2019-12-26 20:48:29,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906467086] [2019-12-26 20:48:29,376 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:48:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:29,414 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:29,415 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:29,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:29,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:29,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003827439] [2019-12-26 20:48:29,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:29,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:29,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:29,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:29,532 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-26 20:48:29,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:29,935 INFO L93 Difference]: Finished difference Result 282 states and 668 transitions. [2019-12-26 20:48:29,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:48:29,936 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:29,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:29,937 INFO L225 Difference]: With dead ends: 282 [2019-12-26 20:48:29,937 INFO L226 Difference]: Without dead ends: 281 [2019-12-26 20:48:29,937 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=621, Unknown=0, NotChecked=0, Total=930 [2019-12-26 20:48:29,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-12-26 20:48:29,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 216. [2019-12-26 20:48:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-26 20:48:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-26 20:48:29,942 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-26 20:48:29,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:29,942 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-26 20:48:29,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:29,942 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-26 20:48:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:29,942 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:29,942 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:30,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:30,143 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:30,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:30,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167296, now seen corresponding path program 122 times [2019-12-26 20:48:30,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:30,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982695110] [2019-12-26 20:48:30,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:30,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982695110] [2019-12-26 20:48:30,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601231276] [2019-12-26 20:48:30,237 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 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 [2019-12-26 20:48:30,281 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:48:30,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:30,282 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:30,282 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:30,801 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_414 Int)) (and (<= c_~j~0 (+ v_~i~0_414 2)) (<= c_~i~0 (+ v_~i~0_414 c_~j~0)) (<= (div (+ (* v_~i~0_414 (- 1)) 1) (- 3)) 2))) is different from true [2019-12-26 20:48:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-12-26 20:48:33,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:33,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:33,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568224961] [2019-12-26 20:48:33,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:33,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:33,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:33,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=4, NotChecked=30, Total=306 [2019-12-26 20:48:33,553 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-26 20:48:34,099 WARN L192 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2019-12-26 20:48:36,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:36,748 INFO L93 Difference]: Finished difference Result 334 states and 770 transitions. [2019-12-26 20:48:36,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:48:36,749 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:36,750 INFO L225 Difference]: With dead ends: 334 [2019-12-26 20:48:36,750 INFO L226 Difference]: Without dead ends: 332 [2019-12-26 20:48:36,751 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=317, Invalid=613, Unknown=4, NotChecked=58, Total=992 [2019-12-26 20:48:36,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-12-26 20:48:36,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 216. [2019-12-26 20:48:36,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-26 20:48:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-26 20:48:36,755 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-26 20:48:36,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:36,755 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-26 20:48:36,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:36,755 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-26 20:48:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:36,756 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:36,756 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:36,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:36,956 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:36,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:36,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1460171946, now seen corresponding path program 123 times [2019-12-26 20:48:36,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:36,957 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394876917] [2019-12-26 20:48:36,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:37,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394876917] [2019-12-26 20:48:37,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981567295] [2019-12-26 20:48:37,056 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 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 [2019-12-26 20:48:37,100 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:48:37,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:37,102 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:37,102 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:37,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:37,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:37,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271163304] [2019-12-26 20:48:37,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:37,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:37,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:37,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:37,246 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-26 20:48:38,110 WARN L192 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-26 20:48:39,029 WARN L192 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-26 20:48:39,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:39,886 INFO L93 Difference]: Finished difference Result 315 states and 733 transitions. [2019-12-26 20:48:39,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:48:39,887 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:39,888 INFO L225 Difference]: With dead ends: 315 [2019-12-26 20:48:39,888 INFO L226 Difference]: Without dead ends: 314 [2019-12-26 20:48:39,888 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=353, Invalid=703, Unknown=0, NotChecked=0, Total=1056 [2019-12-26 20:48:39,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2019-12-26 20:48:39,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 214. [2019-12-26 20:48:39,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-26 20:48:39,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 535 transitions. [2019-12-26 20:48:39,891 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 535 transitions. Word has length 14 [2019-12-26 20:48:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:39,892 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 535 transitions. [2019-12-26 20:48:39,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:39,892 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 535 transitions. [2019-12-26 20:48:39,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:39,892 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:39,892 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:40,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:40,093 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:40,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 124 times [2019-12-26 20:48:40,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:40,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829420945] [2019-12-26 20:48:40,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:40,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829420945] [2019-12-26 20:48:40,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082937657] [2019-12-26 20:48:40,178 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 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 [2019-12-26 20:48:40,221 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:48:40,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:40,222 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:40,223 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:40,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:40,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:40,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178856149] [2019-12-26 20:48:40,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:40,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:40,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:40,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:40,701 INFO L87 Difference]: Start difference. First operand 214 states and 535 transitions. Second operand 18 states. [2019-12-26 20:48:41,751 WARN L192 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-26 20:48:43,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:43,478 INFO L93 Difference]: Finished difference Result 288 states and 675 transitions. [2019-12-26 20:48:43,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-26 20:48:43,478 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:43,479 INFO L225 Difference]: With dead ends: 288 [2019-12-26 20:48:43,480 INFO L226 Difference]: Without dead ends: 287 [2019-12-26 20:48:43,480 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=398, Invalid=860, Unknown=2, NotChecked=0, Total=1260 [2019-12-26 20:48:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2019-12-26 20:48:43,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 217. [2019-12-26 20:48:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-26 20:48:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 547 transitions. [2019-12-26 20:48:43,484 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 547 transitions. Word has length 14 [2019-12-26 20:48:43,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:43,484 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 547 transitions. [2019-12-26 20:48:43,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:43,484 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 547 transitions. [2019-12-26 20:48:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:43,484 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:43,484 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:43,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:43,685 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:43,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:43,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 125 times [2019-12-26 20:48:43,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:43,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652392734] [2019-12-26 20:48:43,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:43,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652392734] [2019-12-26 20:48:43,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459116912] [2019-12-26 20:48:43,772 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 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 [2019-12-26 20:48:43,817 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-26 20:48:43,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:43,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:43,818 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:44,367 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_426 Int)) (and (<= c_~i~0 (+ v_~i~0_426 (* 2 c_~j~0))) (<= c_~j~0 (+ v_~i~0_426 2)) (<= (div (+ (* v_~i~0_426 (- 1)) 1) (- 2)) 2))) is different from true [2019-12-26 20:48:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-12-26 20:48:44,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:44,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:44,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552094143] [2019-12-26 20:48:44,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:44,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:44,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:44,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=186, Unknown=1, NotChecked=30, Total=306 [2019-12-26 20:48:44,538 INFO L87 Difference]: Start difference. First operand 217 states and 547 transitions. Second operand 18 states. [2019-12-26 20:48:44,817 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2019-12-26 20:48:51,454 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-26 20:48:54,385 WARN L192 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-26 20:48:56,488 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-26 20:48:56,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:48:56,731 INFO L93 Difference]: Finished difference Result 335 states and 781 transitions. [2019-12-26 20:48:56,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:48:56,731 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:48:56,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:48:56,734 INFO L225 Difference]: With dead ends: 335 [2019-12-26 20:48:56,734 INFO L226 Difference]: Without dead ends: 333 [2019-12-26 20:48:56,734 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=363, Invalid=762, Unknown=1, NotChecked=64, Total=1190 [2019-12-26 20:48:56,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2019-12-26 20:48:56,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 216. [2019-12-26 20:48:56,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-26 20:48:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 543 transitions. [2019-12-26 20:48:56,739 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 543 transitions. Word has length 14 [2019-12-26 20:48:56,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:48:56,739 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 543 transitions. [2019-12-26 20:48:56,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:48:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 543 transitions. [2019-12-26 20:48:56,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:48:56,740 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:48:56,740 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:48:56,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:48:56,944 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:48:56,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:48:56,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 126 times [2019-12-26 20:48:56,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:48:56,944 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20255678] [2019-12-26 20:48:56,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:48:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:48:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:57,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20255678] [2019-12-26 20:48:57,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812518385] [2019-12-26 20:48:57,032 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 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 [2019-12-26 20:48:57,077 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:48:57,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:48:57,078 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:48:57,079 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:48:58,442 WARN L192 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:48:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:48:58,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:48:58,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:48:58,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130185004] [2019-12-26 20:48:58,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:48:58,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:48:58,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:48:58,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:48:58,474 INFO L87 Difference]: Start difference. First operand 216 states and 543 transitions. Second operand 18 states. [2019-12-26 20:48:59,094 WARN L192 SmtUtils]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-26 20:49:00,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:00,538 INFO L93 Difference]: Finished difference Result 352 states and 825 transitions. [2019-12-26 20:49:00,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:49:00,539 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:00,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:00,540 INFO L225 Difference]: With dead ends: 352 [2019-12-26 20:49:00,540 INFO L226 Difference]: Without dead ends: 350 [2019-12-26 20:49:00,541 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:49:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2019-12-26 20:49:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 223. [2019-12-26 20:49:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-12-26 20:49:00,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 571 transitions. [2019-12-26 20:49:00,545 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 571 transitions. Word has length 14 [2019-12-26 20:49:00,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:00,546 INFO L462 AbstractCegarLoop]: Abstraction has 223 states and 571 transitions. [2019-12-26 20:49:00,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 571 transitions. [2019-12-26 20:49:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:00,546 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:00,546 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:00,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:00,747 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:00,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:00,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 127 times [2019-12-26 20:49:00,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:00,748 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378351317] [2019-12-26 20:49:00,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:00,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378351317] [2019-12-26 20:49:00,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376422083] [2019-12-26 20:49:00,843 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 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 [2019-12-26 20:49:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:00,888 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:00,889 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:01,896 WARN L192 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-26 20:49:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:02,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:02,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:02,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904419957] [2019-12-26 20:49:02,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:02,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:02,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:02,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:02,055 INFO L87 Difference]: Start difference. First operand 223 states and 571 transitions. Second operand 18 states. [2019-12-26 20:49:03,555 WARN L192 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-26 20:49:04,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:04,521 INFO L93 Difference]: Finished difference Result 341 states and 801 transitions. [2019-12-26 20:49:04,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:49:04,521 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:04,522 INFO L225 Difference]: With dead ends: 341 [2019-12-26 20:49:04,522 INFO L226 Difference]: Without dead ends: 339 [2019-12-26 20:49:04,523 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=375, Invalid=747, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:49:04,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2019-12-26 20:49:04,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 221. [2019-12-26 20:49:04,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-26 20:49:04,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 563 transitions. [2019-12-26 20:49:04,527 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 563 transitions. Word has length 14 [2019-12-26 20:49:04,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:04,528 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 563 transitions. [2019-12-26 20:49:04,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:04,528 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 563 transitions. [2019-12-26 20:49:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:04,528 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:04,528 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:04,728 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:04,729 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:04,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:04,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 128 times [2019-12-26 20:49:04,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:04,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209385457] [2019-12-26 20:49:04,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:04,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209385457] [2019-12-26 20:49:04,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689350343] [2019-12-26 20:49:04,825 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 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 [2019-12-26 20:49:04,874 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:49:04,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:04,875 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:04,876 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:05,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:05,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:05,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473361226] [2019-12-26 20:49:05,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:05,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:05,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:05,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:05,018 INFO L87 Difference]: Start difference. First operand 221 states and 563 transitions. Second operand 18 states. [2019-12-26 20:49:05,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:05,806 INFO L93 Difference]: Finished difference Result 338 states and 792 transitions. [2019-12-26 20:49:05,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:49:05,807 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:05,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:05,808 INFO L225 Difference]: With dead ends: 338 [2019-12-26 20:49:05,808 INFO L226 Difference]: Without dead ends: 336 [2019-12-26 20:49:05,808 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:49:05,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2019-12-26 20:49:05,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 223. [2019-12-26 20:49:05,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-12-26 20:49:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 571 transitions. [2019-12-26 20:49:05,814 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 571 transitions. Word has length 14 [2019-12-26 20:49:05,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:05,814 INFO L462 AbstractCegarLoop]: Abstraction has 223 states and 571 transitions. [2019-12-26 20:49:05,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:05,814 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 571 transitions. [2019-12-26 20:49:05,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:05,815 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:05,815 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:06,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:06,018 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:06,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:06,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 129 times [2019-12-26 20:49:06,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:06,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838257332] [2019-12-26 20:49:06,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:06,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838257332] [2019-12-26 20:49:06,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086570626] [2019-12-26 20:49:06,111 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 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 [2019-12-26 20:49:06,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:49:06,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:06,158 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-26 20:49:06,159 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:06,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:06,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:06,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772738449] [2019-12-26 20:49:06,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:06,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:06,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:06,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:06,296 INFO L87 Difference]: Start difference. First operand 223 states and 571 transitions. Second operand 18 states. [2019-12-26 20:49:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:07,401 INFO L93 Difference]: Finished difference Result 343 states and 813 transitions. [2019-12-26 20:49:07,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-26 20:49:07,402 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:07,403 INFO L225 Difference]: With dead ends: 343 [2019-12-26 20:49:07,403 INFO L226 Difference]: Without dead ends: 341 [2019-12-26 20:49:07,403 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=424, Invalid=908, Unknown=0, NotChecked=0, Total=1332 [2019-12-26 20:49:07,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2019-12-26 20:49:07,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 221. [2019-12-26 20:49:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-26 20:49:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 563 transitions. [2019-12-26 20:49:07,407 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 563 transitions. Word has length 14 [2019-12-26 20:49:07,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:07,407 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 563 transitions. [2019-12-26 20:49:07,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:07,408 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 563 transitions. [2019-12-26 20:49:07,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:07,408 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:07,408 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:07,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:07,609 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:07,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:07,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 130 times [2019-12-26 20:49:07,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:07,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254986602] [2019-12-26 20:49:07,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:07,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254986602] [2019-12-26 20:49:07,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377478551] [2019-12-26 20:49:07,698 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 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 [2019-12-26 20:49:07,742 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:49:07,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:07,743 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:07,744 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:07,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:07,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:07,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188985752] [2019-12-26 20:49:07,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:07,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:07,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:07,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:07,844 INFO L87 Difference]: Start difference. First operand 221 states and 563 transitions. Second operand 18 states. [2019-12-26 20:49:08,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:08,227 INFO L93 Difference]: Finished difference Result 276 states and 660 transitions. [2019-12-26 20:49:08,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:49:08,228 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:08,229 INFO L225 Difference]: With dead ends: 276 [2019-12-26 20:49:08,229 INFO L226 Difference]: Without dead ends: 275 [2019-12-26 20:49:08,229 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 [2019-12-26 20:49:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-12-26 20:49:08,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 222. [2019-12-26 20:49:08,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-26 20:49:08,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 567 transitions. [2019-12-26 20:49:08,234 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 567 transitions. Word has length 14 [2019-12-26 20:49:08,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:08,234 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 567 transitions. [2019-12-26 20:49:08,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 567 transitions. [2019-12-26 20:49:08,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:08,235 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:08,235 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:08,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:08,435 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:08,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 131 times [2019-12-26 20:49:08,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:08,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661077662] [2019-12-26 20:49:08,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:08,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661077662] [2019-12-26 20:49:08,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798508129] [2019-12-26 20:49:08,539 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 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 [2019-12-26 20:49:08,582 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-26 20:49:08,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:08,584 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:08,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:08,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:08,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:08,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908027782] [2019-12-26 20:49:08,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:08,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:08,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:08,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:08,693 INFO L87 Difference]: Start difference. First operand 222 states and 567 transitions. Second operand 18 states. [2019-12-26 20:49:09,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:09,160 INFO L93 Difference]: Finished difference Result 326 states and 768 transitions. [2019-12-26 20:49:09,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:49:09,160 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:09,161 INFO L225 Difference]: With dead ends: 326 [2019-12-26 20:49:09,161 INFO L226 Difference]: Without dead ends: 325 [2019-12-26 20:49:09,162 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 [2019-12-26 20:49:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-12-26 20:49:09,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 221. [2019-12-26 20:49:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-26 20:49:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 563 transitions. [2019-12-26 20:49:09,166 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 563 transitions. Word has length 14 [2019-12-26 20:49:09,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:09,167 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 563 transitions. [2019-12-26 20:49:09,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 563 transitions. [2019-12-26 20:49:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:09,167 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:09,167 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:09,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:09,368 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:09,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:09,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 132 times [2019-12-26 20:49:09,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:09,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145236300] [2019-12-26 20:49:09,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:09,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145236300] [2019-12-26 20:49:09,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612591226] [2019-12-26 20:49:09,464 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 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 [2019-12-26 20:49:09,506 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-26 20:49:09,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:09,507 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:09,507 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:09,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:09,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:09,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966415591] [2019-12-26 20:49:09,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:09,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:09,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:09,621 INFO L87 Difference]: Start difference. First operand 221 states and 563 transitions. Second operand 18 states. [2019-12-26 20:49:10,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:10,131 INFO L93 Difference]: Finished difference Result 335 states and 798 transitions. [2019-12-26 20:49:10,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:49:10,131 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:10,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:10,132 INFO L225 Difference]: With dead ends: 335 [2019-12-26 20:49:10,132 INFO L226 Difference]: Without dead ends: 333 [2019-12-26 20:49:10,133 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 [2019-12-26 20:49:10,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2019-12-26 20:49:10,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 222. [2019-12-26 20:49:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-26 20:49:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 567 transitions. [2019-12-26 20:49:10,138 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 567 transitions. Word has length 14 [2019-12-26 20:49:10,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:10,138 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 567 transitions. [2019-12-26 20:49:10,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:10,138 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 567 transitions. [2019-12-26 20:49:10,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:10,138 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:10,138 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:10,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:10,339 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:10,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:10,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 133 times [2019-12-26 20:49:10,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:10,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603242032] [2019-12-26 20:49:10,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:10,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603242032] [2019-12-26 20:49:10,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734992468] [2019-12-26 20:49:10,432 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 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 [2019-12-26 20:49:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:10,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:10,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:10,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:10,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:10,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045289838] [2019-12-26 20:49:10,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:10,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:10,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:10,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:10,576 INFO L87 Difference]: Start difference. First operand 222 states and 567 transitions. Second operand 18 states. [2019-12-26 20:49:11,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:11,003 INFO L93 Difference]: Finished difference Result 341 states and 801 transitions. [2019-12-26 20:49:11,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:49:11,004 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:11,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:11,005 INFO L225 Difference]: With dead ends: 341 [2019-12-26 20:49:11,005 INFO L226 Difference]: Without dead ends: 340 [2019-12-26 20:49:11,005 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 [2019-12-26 20:49:11,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2019-12-26 20:49:11,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 222. [2019-12-26 20:49:11,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-26 20:49:11,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 567 transitions. [2019-12-26 20:49:11,010 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 567 transitions. Word has length 14 [2019-12-26 20:49:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:11,010 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 567 transitions. [2019-12-26 20:49:11,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 567 transitions. [2019-12-26 20:49:11,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:11,010 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:11,010 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:11,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:11,211 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:11,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:11,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 134 times [2019-12-26 20:49:11,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:11,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807622047] [2019-12-26 20:49:11,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:11,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807622047] [2019-12-26 20:49:11,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742847521] [2019-12-26 20:49:11,396 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:49:11,467 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:49:11,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:11,469 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:11,470 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:11,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:11,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:11,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328273614] [2019-12-26 20:49:11,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:11,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:11,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:11,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:11,653 INFO L87 Difference]: Start difference. First operand 222 states and 567 transitions. Second operand 18 states. [2019-12-26 20:49:12,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:12,107 INFO L93 Difference]: Finished difference Result 339 states and 804 transitions. [2019-12-26 20:49:12,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:49:12,107 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:12,108 INFO L225 Difference]: With dead ends: 339 [2019-12-26 20:49:12,108 INFO L226 Difference]: Without dead ends: 338 [2019-12-26 20:49:12,108 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:49:12,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2019-12-26 20:49:12,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 222. [2019-12-26 20:49:12,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-26 20:49:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 567 transitions. [2019-12-26 20:49:12,113 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 567 transitions. Word has length 14 [2019-12-26 20:49:12,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:12,113 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 567 transitions. [2019-12-26 20:49:12,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 567 transitions. [2019-12-26 20:49:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:12,114 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:12,114 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:12,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:12,317 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:12,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:12,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 135 times [2019-12-26 20:49:12,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:12,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213715924] [2019-12-26 20:49:12,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:12,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213715924] [2019-12-26 20:49:12,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030305457] [2019-12-26 20:49:12,407 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 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 [2019-12-26 20:49:12,456 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:49:12,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:12,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:12,458 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:12,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:12,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:12,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763655388] [2019-12-26 20:49:12,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:12,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:12,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:12,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:12,573 INFO L87 Difference]: Start difference. First operand 222 states and 567 transitions. Second operand 18 states. [2019-12-26 20:49:13,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:13,038 INFO L93 Difference]: Finished difference Result 334 states and 793 transitions. [2019-12-26 20:49:13,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:49:13,038 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:13,039 INFO L225 Difference]: With dead ends: 334 [2019-12-26 20:49:13,039 INFO L226 Difference]: Without dead ends: 332 [2019-12-26 20:49:13,039 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:49:13,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-12-26 20:49:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 220. [2019-12-26 20:49:13,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-12-26 20:49:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 559 transitions. [2019-12-26 20:49:13,044 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 559 transitions. Word has length 14 [2019-12-26 20:49:13,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:13,045 INFO L462 AbstractCegarLoop]: Abstraction has 220 states and 559 transitions. [2019-12-26 20:49:13,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:13,045 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 559 transitions. [2019-12-26 20:49:13,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:13,045 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:13,045 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:13,249 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:13,249 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:13,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 136 times [2019-12-26 20:49:13,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:13,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772681092] [2019-12-26 20:49:13,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:13,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772681092] [2019-12-26 20:49:13,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056700775] [2019-12-26 20:49:13,340 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:49:13,388 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:49:13,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:13,389 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:13,390 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:14,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:14,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:14,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447885951] [2019-12-26 20:49:14,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:14,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:14,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:14,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=212, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:49:14,904 INFO L87 Difference]: Start difference. First operand 220 states and 559 transitions. Second operand 18 states. [2019-12-26 20:49:15,407 WARN L192 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2019-12-26 20:49:15,806 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2019-12-26 20:49:16,163 WARN L192 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-26 20:49:16,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:16,307 INFO L93 Difference]: Finished difference Result 329 states and 779 transitions. [2019-12-26 20:49:16,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:49:16,308 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:16,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:16,309 INFO L225 Difference]: With dead ends: 329 [2019-12-26 20:49:16,309 INFO L226 Difference]: Without dead ends: 328 [2019-12-26 20:49:16,309 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=359, Invalid=696, Unknown=1, NotChecked=0, Total=1056 [2019-12-26 20:49:16,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-26 20:49:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 218. [2019-12-26 20:49:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-26 20:49:16,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 551 transitions. [2019-12-26 20:49:16,313 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 551 transitions. Word has length 14 [2019-12-26 20:49:16,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:16,314 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 551 transitions. [2019-12-26 20:49:16,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:16,314 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 551 transitions. [2019-12-26 20:49:16,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:16,314 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:16,314 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:16,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:16,515 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:16,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:16,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1607935461, now seen corresponding path program 137 times [2019-12-26 20:49:16,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:16,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147997102] [2019-12-26 20:49:16,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:16,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147997102] [2019-12-26 20:49:16,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174139550] [2019-12-26 20:49:16,606 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 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 [2019-12-26 20:49:16,649 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-26 20:49:16,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:16,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:16,651 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:16,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:16,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:16,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607144128] [2019-12-26 20:49:16,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:16,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:16,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:16,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:16,770 INFO L87 Difference]: Start difference. First operand 218 states and 551 transitions. Second operand 18 states. [2019-12-26 20:49:17,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:17,103 INFO L93 Difference]: Finished difference Result 237 states and 572 transitions. [2019-12-26 20:49:17,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:49:17,103 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:17,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:17,104 INFO L225 Difference]: With dead ends: 237 [2019-12-26 20:49:17,104 INFO L226 Difference]: Without dead ends: 230 [2019-12-26 20:49:17,105 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=564, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:49:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-26 20:49:17,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 214. [2019-12-26 20:49:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-26 20:49:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 534 transitions. [2019-12-26 20:49:17,110 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 534 transitions. Word has length 14 [2019-12-26 20:49:17,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:17,110 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 534 transitions. [2019-12-26 20:49:17,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:17,110 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 534 transitions. [2019-12-26 20:49:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:17,111 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:17,111 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:17,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:17,314 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:17,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:17,314 INFO L82 PathProgramCache]: Analyzing trace with hash -591198760, now seen corresponding path program 138 times [2019-12-26 20:49:17,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:17,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385235257] [2019-12-26 20:49:17,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:17,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385235257] [2019-12-26 20:49:17,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248340029] [2019-12-26 20:49:17,410 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 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 [2019-12-26 20:49:17,451 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:49:17,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:17,452 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:17,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:17,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:17,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:17,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431281060] [2019-12-26 20:49:17,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:17,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:17,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:17,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:17,585 INFO L87 Difference]: Start difference. First operand 214 states and 534 transitions. Second operand 18 states. [2019-12-26 20:49:17,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:17,977 INFO L93 Difference]: Finished difference Result 243 states and 585 transitions. [2019-12-26 20:49:17,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:49:17,977 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:17,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:17,978 INFO L225 Difference]: With dead ends: 243 [2019-12-26 20:49:17,978 INFO L226 Difference]: Without dead ends: 241 [2019-12-26 20:49:17,979 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:49:17,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-26 20:49:17,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 210. [2019-12-26 20:49:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-26 20:49:17,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-26 20:49:17,982 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-26 20:49:17,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:17,982 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-26 20:49:17,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:17,982 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-26 20:49:17,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:17,983 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:17,983 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:18,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:18,185 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:18,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:18,185 INFO L82 PathProgramCache]: Analyzing trace with hash -591203410, now seen corresponding path program 139 times [2019-12-26 20:49:18,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:18,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155729785] [2019-12-26 20:49:18,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:18,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155729785] [2019-12-26 20:49:18,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478263847] [2019-12-26 20:49:18,280 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 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 [2019-12-26 20:49:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:18,323 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:18,324 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:20,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:20,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:20,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713638732] [2019-12-26 20:49:20,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:20,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:20,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:20,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=224, Unknown=3, NotChecked=0, Total=306 [2019-12-26 20:49:20,219 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 18 states. [2019-12-26 20:49:20,900 WARN L192 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2019-12-26 20:49:21,885 WARN L192 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2019-12-26 20:49:23,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:23,616 INFO L93 Difference]: Finished difference Result 267 states and 633 transitions. [2019-12-26 20:49:23,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:49:23,616 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:23,617 INFO L225 Difference]: With dead ends: 267 [2019-12-26 20:49:23,617 INFO L226 Difference]: Without dead ends: 264 [2019-12-26 20:49:23,618 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=284, Invalid=640, Unknown=6, NotChecked=0, Total=930 [2019-12-26 20:49:23,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-12-26 20:49:23,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 211. [2019-12-26 20:49:23,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-26 20:49:23,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 533 transitions. [2019-12-26 20:49:23,622 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 533 transitions. Word has length 14 [2019-12-26 20:49:23,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:23,622 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 533 transitions. [2019-12-26 20:49:23,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 533 transitions. [2019-12-26 20:49:23,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:23,623 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:23,623 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:23,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:23,824 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:23,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:23,824 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 140 times [2019-12-26 20:49:23,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:23,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185939098] [2019-12-26 20:49:23,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:23,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185939098] [2019-12-26 20:49:23,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692840040] [2019-12-26 20:49:23,921 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 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 [2019-12-26 20:49:23,963 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:49:23,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:23,964 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:23,964 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:24,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:24,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:24,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337667256] [2019-12-26 20:49:24,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:24,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:24,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:24,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:24,135 INFO L87 Difference]: Start difference. First operand 211 states and 533 transitions. Second operand 18 states. [2019-12-26 20:49:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:24,593 INFO L93 Difference]: Finished difference Result 264 states and 627 transitions. [2019-12-26 20:49:24,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:49:24,594 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:24,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:24,594 INFO L225 Difference]: With dead ends: 264 [2019-12-26 20:49:24,595 INFO L226 Difference]: Without dead ends: 263 [2019-12-26 20:49:24,595 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:49:24,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-12-26 20:49:24,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 210. [2019-12-26 20:49:24,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-26 20:49:24,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-26 20:49:24,599 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-26 20:49:24,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:24,599 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-26 20:49:24,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-26 20:49:24,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:24,600 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:24,600 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:24,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:24,804 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:24,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:24,804 INFO L82 PathProgramCache]: Analyzing trace with hash -591347560, now seen corresponding path program 141 times [2019-12-26 20:49:24,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:24,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978684640] [2019-12-26 20:49:24,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:24,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978684640] [2019-12-26 20:49:24,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149865685] [2019-12-26 20:49:24,902 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 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 [2019-12-26 20:49:24,946 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-26 20:49:24,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:24,947 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:24,948 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:26,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:26,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:26,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327426214] [2019-12-26 20:49:26,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:26,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:26,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:26,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=222, Unknown=3, NotChecked=0, Total=306 [2019-12-26 20:49:26,361 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 18 states. [2019-12-26 20:49:27,399 WARN L192 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 11 [2019-12-26 20:49:29,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:29,184 INFO L93 Difference]: Finished difference Result 269 states and 632 transitions. [2019-12-26 20:49:29,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:49:29,185 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:29,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:29,185 INFO L225 Difference]: With dead ends: 269 [2019-12-26 20:49:29,185 INFO L226 Difference]: Without dead ends: 265 [2019-12-26 20:49:29,186 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=318, Invalid=671, Unknown=3, NotChecked=0, Total=992 [2019-12-26 20:49:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-26 20:49:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2019-12-26 20:49:29,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-26 20:49:29,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 536 transitions. [2019-12-26 20:49:29,190 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 536 transitions. Word has length 14 [2019-12-26 20:49:29,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:29,190 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 536 transitions. [2019-12-26 20:49:29,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 536 transitions. [2019-12-26 20:49:29,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:29,191 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:29,191 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:29,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:29,391 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:29,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:29,392 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 142 times [2019-12-26 20:49:29,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:29,392 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410336431] [2019-12-26 20:49:29,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:29,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410336431] [2019-12-26 20:49:29,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279048483] [2019-12-26 20:49:29,481 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 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 [2019-12-26 20:49:29,526 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:49:29,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:29,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:29,527 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:30,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:30,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:30,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190330284] [2019-12-26 20:49:30,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:30,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:30,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:30,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=223, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:49:30,194 INFO L87 Difference]: Start difference. First operand 212 states and 536 transitions. Second operand 18 states. [2019-12-26 20:49:30,822 WARN L192 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-12-26 20:49:31,747 WARN L192 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2019-12-26 20:49:32,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:32,073 INFO L93 Difference]: Finished difference Result 302 states and 698 transitions. [2019-12-26 20:49:32,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:49:32,074 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:32,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:32,075 INFO L225 Difference]: With dead ends: 302 [2019-12-26 20:49:32,075 INFO L226 Difference]: Without dead ends: 300 [2019-12-26 20:49:32,076 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=316, Invalid=675, Unknown=1, NotChecked=0, Total=992 [2019-12-26 20:49:32,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-12-26 20:49:32,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 212. [2019-12-26 20:49:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-26 20:49:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 537 transitions. [2019-12-26 20:49:32,081 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 537 transitions. Word has length 14 [2019-12-26 20:49:32,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:32,081 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 537 transitions. [2019-12-26 20:49:32,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:32,081 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 537 transitions. [2019-12-26 20:49:32,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:32,082 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:32,082 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:32,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:32,282 INFO L410 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:32,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:32,283 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 143 times [2019-12-26 20:49:32,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:32,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697192623] [2019-12-26 20:49:32,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:32,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697192623] [2019-12-26 20:49:32,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267795003] [2019-12-26 20:49:32,412 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:32,478 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-26 20:49:32,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:32,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:32,480 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:32,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:32,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:32,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175998320] [2019-12-26 20:49:32,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:32,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:32,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:32,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:49:32,721 INFO L87 Difference]: Start difference. First operand 212 states and 537 transitions. Second operand 18 states. [2019-12-26 20:49:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:33,415 INFO L93 Difference]: Finished difference Result 287 states and 672 transitions. [2019-12-26 20:49:33,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:49:33,415 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:33,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:33,416 INFO L225 Difference]: With dead ends: 287 [2019-12-26 20:49:33,416 INFO L226 Difference]: Without dead ends: 286 [2019-12-26 20:49:33,417 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:49:33,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-12-26 20:49:33,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 210. [2019-12-26 20:49:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-26 20:49:33,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 530 transitions. [2019-12-26 20:49:33,420 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 530 transitions. Word has length 14 [2019-12-26 20:49:33,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:33,420 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 530 transitions. [2019-12-26 20:49:33,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:33,421 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 530 transitions. [2019-12-26 20:49:33,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:33,421 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:33,421 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:33,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:33,622 INFO L410 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:33,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:33,622 INFO L82 PathProgramCache]: Analyzing trace with hash -595816210, now seen corresponding path program 144 times [2019-12-26 20:49:33,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:33,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990140965] [2019-12-26 20:49:33,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:33,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990140965] [2019-12-26 20:49:33,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196620172] [2019-12-26 20:49:33,717 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:33,782 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:49:33,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:33,784 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:33,785 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:35,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:35,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:35,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258465887] [2019-12-26 20:49:35,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:35,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:35,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:35,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=223, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:49:35,015 INFO L87 Difference]: Start difference. First operand 210 states and 530 transitions. Second operand 18 states. [2019-12-26 20:49:35,611 WARN L192 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-26 20:49:36,247 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-26 20:49:37,422 WARN L192 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-26 20:49:39,149 WARN L192 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-12-26 20:49:39,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:39,475 INFO L93 Difference]: Finished difference Result 279 states and 650 transitions. [2019-12-26 20:49:39,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-26 20:49:39,476 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:39,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:39,477 INFO L225 Difference]: With dead ends: 279 [2019-12-26 20:49:39,477 INFO L226 Difference]: Without dead ends: 274 [2019-12-26 20:49:39,477 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=372, Invalid=814, Unknown=4, NotChecked=0, Total=1190 [2019-12-26 20:49:39,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-12-26 20:49:39,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 213. [2019-12-26 20:49:39,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-26 20:49:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 539 transitions. [2019-12-26 20:49:39,482 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 539 transitions. Word has length 14 [2019-12-26 20:49:39,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:39,482 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 539 transitions. [2019-12-26 20:49:39,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:39,482 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 539 transitions. [2019-12-26 20:49:39,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:39,483 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:39,483 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:39,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:39,683 INFO L410 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:39,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:39,684 INFO L82 PathProgramCache]: Analyzing trace with hash -595816365, now seen corresponding path program 145 times [2019-12-26 20:49:39,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:39,684 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727069503] [2019-12-26 20:49:39,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:39,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727069503] [2019-12-26 20:49:39,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203089282] [2019-12-26 20:49:39,773 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:39,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:39,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:43,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:43,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:43,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614918321] [2019-12-26 20:49:43,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:43,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:43,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:43,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=221, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:49:43,010 INFO L87 Difference]: Start difference. First operand 213 states and 539 transitions. Second operand 18 states. [2019-12-26 20:49:47,263 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-26 20:49:49,702 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2019-12-26 20:49:53,311 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-26 20:49:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:49:53,360 INFO L93 Difference]: Finished difference Result 300 states and 693 transitions. [2019-12-26 20:49:53,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:49:53,360 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:49:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:49:53,361 INFO L225 Difference]: With dead ends: 300 [2019-12-26 20:49:53,361 INFO L226 Difference]: Without dead ends: 299 [2019-12-26 20:49:53,362 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=316, Invalid=675, Unknown=1, NotChecked=0, Total=992 [2019-12-26 20:49:53,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2019-12-26 20:49:53,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 212. [2019-12-26 20:49:53,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-26 20:49:53,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 536 transitions. [2019-12-26 20:49:53,366 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 536 transitions. Word has length 14 [2019-12-26 20:49:53,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:49:53,366 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 536 transitions. [2019-12-26 20:49:53,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:49:53,366 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 536 transitions. [2019-12-26 20:49:53,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:49:53,366 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:49:53,367 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:49:53,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:53,567 INFO L410 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:49:53,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:49:53,568 INFO L82 PathProgramCache]: Analyzing trace with hash -595821015, now seen corresponding path program 146 times [2019-12-26 20:49:53,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:49:53,568 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110464681] [2019-12-26 20:49:53,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:49:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:49:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:53,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110464681] [2019-12-26 20:49:53,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586120666] [2019-12-26 20:49:53,660 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:49:53,704 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:49:53,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:49:53,705 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:49:53,706 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:49:56,080 WARN L192 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-26 20:49:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:49:56,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:49:56,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:49:56,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494318217] [2019-12-26 20:49:56,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:49:56,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:49:56,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:49:56,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=219, Unknown=1, NotChecked=0, Total=306 [2019-12-26 20:49:56,082 INFO L87 Difference]: Start difference. First operand 212 states and 536 transitions. Second operand 18 states. [2019-12-26 20:49:56,831 WARN L192 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-26 20:49:58,036 WARN L192 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-26 20:50:00,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:00,200 INFO L93 Difference]: Finished difference Result 332 states and 760 transitions. [2019-12-26 20:50:00,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:50:00,200 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:50:00,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:00,201 INFO L225 Difference]: With dead ends: 332 [2019-12-26 20:50:00,201 INFO L226 Difference]: Without dead ends: 330 [2019-12-26 20:50:00,202 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=302, Invalid=625, Unknown=3, NotChecked=0, Total=930 [2019-12-26 20:50:00,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2019-12-26 20:50:00,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 215. [2019-12-26 20:50:00,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-26 20:50:00,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 548 transitions. [2019-12-26 20:50:00,207 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 548 transitions. Word has length 14 [2019-12-26 20:50:00,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:00,207 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 548 transitions. [2019-12-26 20:50:00,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:50:00,207 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 548 transitions. [2019-12-26 20:50:00,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:50:00,208 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:00,208 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:00,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:00,411 INFO L410 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:00,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:00,412 INFO L82 PathProgramCache]: Analyzing trace with hash -595821170, now seen corresponding path program 147 times [2019-12-26 20:50:00,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:00,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998243700] [2019-12-26 20:50:00,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:00,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998243700] [2019-12-26 20:50:00,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149399431] [2019-12-26 20:50:00,496 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:00,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:50:00,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:00,539 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-26 20:50:00,540 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:00,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:00,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:50:00,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166789428] [2019-12-26 20:50:00,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:50:00,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:00,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:50:00,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:50:00,641 INFO L87 Difference]: Start difference. First operand 215 states and 548 transitions. Second operand 18 states. [2019-12-26 20:50:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:50:01,143 INFO L93 Difference]: Finished difference Result 311 states and 722 transitions. [2019-12-26 20:50:01,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-26 20:50:01,144 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-26 20:50:01,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:50:01,144 INFO L225 Difference]: With dead ends: 311 [2019-12-26 20:50:01,144 INFO L226 Difference]: Without dead ends: 309 [2019-12-26 20:50:01,145 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:50:01,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2019-12-26 20:50:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 213. [2019-12-26 20:50:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-26 20:50:01,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 541 transitions. [2019-12-26 20:50:01,149 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 541 transitions. Word has length 14 [2019-12-26 20:50:01,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:50:01,149 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 541 transitions. [2019-12-26 20:50:01,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:50:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 541 transitions. [2019-12-26 20:50:01,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:50:01,150 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:50:01,150 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:50:01,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:01,350 INFO L410 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:50:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:50:01,351 INFO L82 PathProgramCache]: Analyzing trace with hash -595965320, now seen corresponding path program 148 times [2019-12-26 20:50:01,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:50:01,351 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254174821] [2019-12-26 20:50:01,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:50:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:50:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:01,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254174821] [2019-12-26 20:50:01,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368355733] [2019-12-26 20:50:01,442 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:01,488 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:50:01,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:50:01,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:50:01,489 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:50:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:50:03,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:50:03,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-26 20:50:03,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513296570] [2019-12-26 20:50:03,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:50:03,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:50:03,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:50:03,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2019-12-26 20:50:03,978 INFO L87 Difference]: Start difference. First operand 213 states and 541 transitions. Second operand 18 states. [2019-12-26 20:50:04,700 WARN L192 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-12-26 20:50:05,310 WARN L192 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 Received shutdown request... [2019-12-26 20:50:06,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:50:06,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:50:06,421 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-26 20:50:06,427 WARN L227 ceAbstractionStarter]: Timeout [2019-12-26 20:50:06,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.12 08:50:06 BasicIcfg [2019-12-26 20:50:06,427 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-26 20:50:06,428 INFO L168 Benchmark]: Toolchain (without parser) took 286388.64 ms. Allocated memory was 137.4 MB in the beginning and 178.8 MB in the end (delta: 41.4 MB). Free memory was 100.9 MB in the beginning and 148.1 MB in the end (delta: -47.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-26 20:50:06,428 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-26 20:50:06,429 INFO L168 Benchmark]: CACSL2BoogieTranslator took 675.18 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 100.5 MB in the beginning and 159.4 MB in the end (delta: -58.9 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:06,429 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.49 ms. Allocated memory is still 201.9 MB. Free memory was 159.4 MB in the beginning and 157.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:06,429 INFO L168 Benchmark]: Boogie Preprocessor took 25.68 ms. Allocated memory is still 201.9 MB. Free memory was 157.4 MB in the beginning and 155.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:06,430 INFO L168 Benchmark]: RCFGBuilder took 451.19 ms. Allocated memory is still 201.9 MB. Free memory was 155.9 MB in the beginning and 135.9 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2019-12-26 20:50:06,430 INFO L168 Benchmark]: TraceAbstraction took 285157.89 ms. Allocated memory was 201.9 MB in the beginning and 178.8 MB in the end (delta: -23.1 MB). Free memory was 135.2 MB in the beginning and 148.1 MB in the end (delta: -12.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-26 20:50:06,432 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 675.18 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 100.5 MB in the beginning and 159.4 MB in the end (delta: -58.9 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 73.49 ms. Allocated memory is still 201.9 MB. Free memory was 159.4 MB in the beginning and 157.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.68 ms. Allocated memory is still 201.9 MB. Free memory was 157.4 MB in the beginning and 155.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 451.19 ms. Allocated memory is still 201.9 MB. Free memory was 155.9 MB in the beginning and 135.9 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 285157.89 ms. Allocated memory was 201.9 MB in the beginning and 178.8 MB in the end (delta: -23.1 MB). Free memory was 135.2 MB in the beginning and 148.1 MB in the end (delta: -12.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 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 (213states) and FLOYD_HOARE automaton (currently 14 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (43 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 285.0s, OverallIterations: 163, TraceHistogramMax: 7, AutomataDifference: 161.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1566 SDtfs, 21990 SDslu, 13019 SDs, 0 SdLazy, 7282 SolverSat, 4033 SolverUnsat, 30 SolverUnknown, 0 SolverNotchecked, 49.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4429 GetRequests, 781 SyntacticMatches, 10 SemanticMatches, 3638 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 20980 ImplicationChecksByTransitivity, 185.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=223occurred in iteration=141, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 162 MinimizatonAttempts, 8382 StatesRemovedByMinimization, 159 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 79.5s InterpolantComputationTime, 4057 NumberOfCodeBlocks, 4057 NumberOfCodeBlocksAsserted, 529 NumberOfCheckSat, 3736 ConstructedInterpolants, 151 QuantifiedInterpolants, 433764 SizeOfPredicates, 6 NumberOfNonLiveVariables, 14620 ConjunctsInSsa, 1731 ConjunctsInUnsatCore, 321 InterpolantComputations, 7 PerfectInterpolantSequences, 42/2360 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