/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 19:52:48,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 19:52:48,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 19:52:48,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 19:52:48,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 19:52:48,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 19:52:48,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 19:52:48,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 19:52:48,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 19:52:48,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 19:52:48,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 19:52:48,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 19:52:48,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 19:52:48,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 19:52:48,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 19:52:48,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 19:52:48,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 19:52:48,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 19:52:48,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 19:52:48,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 19:52:48,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 19:52:48,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 19:52:48,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 19:52:48,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 19:52:49,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 19:52:49,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 19:52:49,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 19:52:49,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 19:52:49,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 19:52:49,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 19:52:49,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 19:52:49,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 19:52:49,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 19:52:49,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 19:52:49,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 19:52:49,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 19:52:49,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 19:52:49,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 19:52:49,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 19:52:49,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 19:52:49,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 19:52:49,018 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2020-10-15 19:52:49,070 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 19:52:49,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 19:52:49,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 19:52:49,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 19:52:49,075 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 19:52:49,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 19:52:49,075 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 19:52:49,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 19:52:49,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 19:52:49,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 19:52:49,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 19:52:49,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 19:52:49,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 19:52:49,077 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 19:52:49,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 19:52:49,077 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 19:52:49,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 19:52:49,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 19:52:49,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 19:52:49,078 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 19:52:49,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 19:52:49,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 19:52:49,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 19:52:49,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 19:52:49,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 19:52:49,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 19:52:49,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 19:52:49,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 19:52:49,081 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 19:52:49,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 19:52:49,387 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 19:52:49,391 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 19:52:49,392 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 19:52:49,393 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 19:52:49,393 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-10-15 19:52:49,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9e1516ec/bff956b5bd704206939f4e0d524cae98/FLAG6c096f633 [2020-10-15 19:52:49,962 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 19:52:49,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-10-15 19:52:49,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9e1516ec/bff956b5bd704206939f4e0d524cae98/FLAG6c096f633 [2020-10-15 19:52:50,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9e1516ec/bff956b5bd704206939f4e0d524cae98 [2020-10-15 19:52:50,241 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 19:52:50,243 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 19:52:50,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 19:52:50,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 19:52:50,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 19:52:50,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ecc0849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50, skipping insertion in model container [2020-10-15 19:52:50,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 19:52:50,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 19:52:50,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 19:52:50,807 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 19:52:50,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 19:52:50,925 INFO L208 MainTranslator]: Completed translation [2020-10-15 19:52:50,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50 WrapperNode [2020-10-15 19:52:50,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 19:52:50,927 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 19:52:50,927 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 19:52:50,927 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 19:52:50,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 19:52:50,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 19:52:50,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 19:52:50,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 19:52:50,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:51,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 19:52:51,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 19:52:51,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 19:52:51,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 19:52:51,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 19:52:51,073 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 19:52:51,074 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 19:52:51,074 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 19:52:51,074 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 19:52:51,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 19:52:51,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 19:52:51,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 19:52:51,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 19:52:51,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 19:52:51,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 19:52:51,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 19:52:51,076 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 19:52:51,377 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 19:52:51,377 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 19:52:51,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:52:51 BoogieIcfgContainer [2020-10-15 19:52:51,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 19:52:51,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 19:52:51,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 19:52:51,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 19:52:51,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:52:50" (1/3) ... [2020-10-15 19:52:51,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38d796fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:52:51, skipping insertion in model container [2020-10-15 19:52:51,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (2/3) ... [2020-10-15 19:52:51,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38d796fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:52:51, skipping insertion in model container [2020-10-15 19:52:51,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:52:51" (3/3) ... [2020-10-15 19:52:51,388 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2020-10-15 19:52:51,401 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 19:52:51,401 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 19:52:51,408 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 19:52:51,409 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 19:52:51,437 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,437 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,437 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,438 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,438 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,438 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,439 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,439 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,439 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,440 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,440 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,440 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,441 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,441 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,441 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,442 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,442 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,442 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,442 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,443 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,443 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,443 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,444 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,444 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,444 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,445 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,445 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,445 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,445 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,446 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,449 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,450 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,450 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,450 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,450 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,451 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,456 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,456 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,457 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,457 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,457 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,457 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,476 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 19:52:51,498 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 19:52:51,498 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 19:52:51,498 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 19:52:51,498 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 19:52:51,498 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 19:52:51,499 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 19:52:51,499 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 19:52:51,499 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 19:52:51,512 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 19:52:51,515 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 19:52:51,518 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 19:52:51,520 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-15 19:52:51,563 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-15 19:52:51,564 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 19:52:51,569 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-15 19:52:51,572 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-15 19:52:52,612 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-15 19:52:52,698 INFO L132 LiptonReduction]: Checked pairs total: 943 [2020-10-15 19:52:52,698 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-15 19:52:52,706 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-15 19:52:52,717 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 19:52:52,720 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 19:52:52,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 19:52:52,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:52,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 19:52:52,728 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-15 19:52:52,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:52,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992268983] [2020-10-15 19:52:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:52,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992268983] [2020-10-15 19:52:52,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:52:52,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 19:52:52,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277589064] [2020-10-15 19:52:52,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 19:52:52,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:52,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 19:52:52,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 19:52:52,983 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 19:52:53,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:53,050 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-15 19:52:53,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 19:52:53,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 19:52:53,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:53,065 INFO L225 Difference]: With dead ends: 83 [2020-10-15 19:52:53,065 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 19:52:53,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:52:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 19:52:53,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-15 19:52:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 19:52:53,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-15 19:52:53,110 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-15 19:52:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:53,111 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-15 19:52:53,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 19:52:53,111 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-15 19:52:53,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 19:52:53,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:53,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:53,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 19:52:53,113 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:53,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:53,113 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-15 19:52:53,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:53,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382072275] [2020-10-15 19:52:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:53,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382072275] [2020-10-15 19:52:53,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:52:53,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 19:52:53,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125243144] [2020-10-15 19:52:53,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 19:52:53,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:53,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 19:52:53,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:52:53,225 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-15 19:52:53,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:53,275 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-15 19:52:53,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:52:53,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 19:52:53,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:53,277 INFO L225 Difference]: With dead ends: 80 [2020-10-15 19:52:53,277 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 19:52:53,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 19:52:53,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 19:52:53,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-15 19:52:53,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 19:52:53,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-15 19:52:53,288 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-15 19:52:53,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:53,289 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-15 19:52:53,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 19:52:53,290 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-15 19:52:53,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 19:52:53,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:53,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:53,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 19:52:53,291 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:53,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:53,292 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-15 19:52:53,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:53,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110337685] [2020-10-15 19:52:53,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:53,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110337685] [2020-10-15 19:52:53,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:52:53,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 19:52:53,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923271833] [2020-10-15 19:52:53,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 19:52:53,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:53,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 19:52:53,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:52:53,374 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-15 19:52:53,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:53,399 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-15 19:52:53,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 19:52:53,400 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 19:52:53,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:53,401 INFO L225 Difference]: With dead ends: 73 [2020-10-15 19:52:53,401 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 19:52:53,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:52:53,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 19:52:53,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-15 19:52:53,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 19:52:53,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-15 19:52:53,411 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-15 19:52:53,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:53,411 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-15 19:52:53,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 19:52:53,412 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-15 19:52:53,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 19:52:53,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:53,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:53,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 19:52:53,413 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:53,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:53,414 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-15 19:52:53,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:53,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274606764] [2020-10-15 19:52:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:53,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274606764] [2020-10-15 19:52:53,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:52:53,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 19:52:53,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192158115] [2020-10-15 19:52:53,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 19:52:53,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:53,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 19:52:53,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:52:53,473 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-15 19:52:53,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:53,527 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-15 19:52:53,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:52:53,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 19:52:53,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:53,529 INFO L225 Difference]: With dead ends: 86 [2020-10-15 19:52:53,530 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 19:52:53,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 19:52:53,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 19:52:53,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-15 19:52:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 19:52:53,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-15 19:52:53,540 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-15 19:52:53,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:53,540 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-15 19:52:53,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 19:52:53,540 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-15 19:52:53,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:52:53,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:53,542 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:53,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 19:52:53,542 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:53,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:53,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-15 19:52:53,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:53,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775771441] [2020-10-15 19:52:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:53,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775771441] [2020-10-15 19:52:53,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003641631] [2020-10-15 19:52:53,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:53,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:52:53,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:53,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:52:53,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:53,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:52:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:53,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:53,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-15 19:52:53,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126458145] [2020-10-15 19:52:53,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 19:52:53,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:53,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 19:52:53,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-15 19:52:53,848 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-15 19:52:53,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:53,924 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-15 19:52:53,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:52:53,925 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-15 19:52:53,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:53,928 INFO L225 Difference]: With dead ends: 101 [2020-10-15 19:52:53,928 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 19:52:53,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:52:53,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 19:52:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-15 19:52:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 19:52:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-15 19:52:53,936 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-15 19:52:53,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:53,937 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-15 19:52:53,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 19:52:53,937 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-15 19:52:53,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:52:53,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:53,938 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:54,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:54,153 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:54,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:54,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-15 19:52:54,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:54,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519261496] [2020-10-15 19:52:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:54,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519261496] [2020-10-15 19:52:54,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692391813] [2020-10-15 19:52:54,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:54,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:52:54,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:54,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:52:54,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:54,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:54,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 19:52:54,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626063961] [2020-10-15 19:52:54,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:52:54,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:54,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:52:54,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:52:54,394 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-15 19:52:54,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:54,425 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 19:52:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 19:52:54,425 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 19:52:54,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:54,427 INFO L225 Difference]: With dead ends: 84 [2020-10-15 19:52:54,427 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 19:52:54,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:52:54,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 19:52:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-15 19:52:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 19:52:54,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-15 19:52:54,440 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-15 19:52:54,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:54,441 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-15 19:52:54,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:52:54,442 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-15 19:52:54,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:52:54,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:54,443 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:54,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:54,658 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:54,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-15 19:52:54,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:54,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110755008] [2020-10-15 19:52:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:54,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110755008] [2020-10-15 19:52:54,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287851669] [2020-10-15 19:52:54,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:54,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:52:54,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:54,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:52:54,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:54,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:54,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 19:52:54,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340780370] [2020-10-15 19:52:54,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:52:54,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:54,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:52:54,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:52:54,851 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-15 19:52:54,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:54,909 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-15 19:52:54,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:52:54,910 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 19:52:54,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:54,911 INFO L225 Difference]: With dead ends: 90 [2020-10-15 19:52:54,911 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 19:52:54,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-15 19:52:54,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 19:52:54,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-15 19:52:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 19:52:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-15 19:52:54,919 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-15 19:52:54,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:54,919 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-15 19:52:54,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:52:54,920 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-15 19:52:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:52:54,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:54,921 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:55,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:55,136 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:55,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:55,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-15 19:52:55,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:55,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828871732] [2020-10-15 19:52:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:55,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828871732] [2020-10-15 19:52:55,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738191341] [2020-10-15 19:52:55,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:55,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:52:55,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:55,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:52:55,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:55,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:52:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:55,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:55,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 19:52:55,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306443017] [2020-10-15 19:52:55,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:52:55,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:55,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:52:55,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:52:55,328 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-15 19:52:55,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:55,425 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 19:52:55,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:52:55,426 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 19:52:55,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:55,427 INFO L225 Difference]: With dead ends: 99 [2020-10-15 19:52:55,427 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 19:52:55,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:52:55,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 19:52:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-15 19:52:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 19:52:55,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-15 19:52:55,435 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-15 19:52:55,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:55,435 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-15 19:52:55,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:52:55,435 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-15 19:52:55,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:55,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:55,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:55,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:55,651 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:55,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:55,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-15 19:52:55,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:55,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64031349] [2020-10-15 19:52:55,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:55,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64031349] [2020-10-15 19:52:55,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:52:55,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 19:52:55,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523920883] [2020-10-15 19:52:55,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:52:55,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:55,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:52:55,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:52:55,712 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-15 19:52:55,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:55,750 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-15 19:52:55,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 19:52:55,751 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 19:52:55,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:55,752 INFO L225 Difference]: With dead ends: 92 [2020-10-15 19:52:55,752 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 19:52:55,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:52:55,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 19:52:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-15 19:52:55,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 19:52:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-15 19:52:55,762 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-15 19:52:55,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:55,763 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-15 19:52:55,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:52:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-15 19:52:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:55,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:55,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:55,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 19:52:55,765 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:55,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:55,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-15 19:52:55,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:55,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216012425] [2020-10-15 19:52:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:55,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216012425] [2020-10-15 19:52:55,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:52:55,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 19:52:55,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140565380] [2020-10-15 19:52:55,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:52:55,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:55,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:52:55,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:52:55,829 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-15 19:52:55,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:55,880 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-15 19:52:55,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:52:55,880 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 19:52:55,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:55,882 INFO L225 Difference]: With dead ends: 100 [2020-10-15 19:52:55,882 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 19:52:55,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 19:52:55,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 19:52:55,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-15 19:52:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 19:52:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-15 19:52:55,904 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-15 19:52:55,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:55,904 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-15 19:52:55,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:52:55,904 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-15 19:52:55,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:55,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:55,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:55,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 19:52:55,906 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:55,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:55,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-15 19:52:55,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:55,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902387135] [2020-10-15 19:52:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:55,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:55,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902387135] [2020-10-15 19:52:55,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:52:55,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 19:52:55,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508445029] [2020-10-15 19:52:55,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:52:55,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:55,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:52:55,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:52:55,955 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-15 19:52:56,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:56,023 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 19:52:56,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:52:56,023 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 19:52:56,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:56,025 INFO L225 Difference]: With dead ends: 105 [2020-10-15 19:52:56,025 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 19:52:56,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:52:56,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 19:52:56,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 19:52:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 19:52:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-15 19:52:56,030 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-15 19:52:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:56,030 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-15 19:52:56,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:52:56,031 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-15 19:52:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:56,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:56,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:56,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 19:52:56,032 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:56,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-15 19:52:56,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:56,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332185332] [2020-10-15 19:52:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:56,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332185332] [2020-10-15 19:52:56,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:52:56,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 19:52:56,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697673722] [2020-10-15 19:52:56,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:52:56,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:56,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:52:56,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:52:56,081 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-15 19:52:56,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:56,162 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 19:52:56,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:52:56,162 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 19:52:56,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:56,164 INFO L225 Difference]: With dead ends: 105 [2020-10-15 19:52:56,164 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 19:52:56,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:52:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 19:52:56,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 19:52:56,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 19:52:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-15 19:52:56,169 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-15 19:52:56,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:56,169 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-15 19:52:56,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:52:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-15 19:52:56,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:56,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:56,170 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:56,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 19:52:56,171 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:56,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:56,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-15 19:52:56,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:56,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572210060] [2020-10-15 19:52:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:56,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572210060] [2020-10-15 19:52:56,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477286293] [2020-10-15 19:52:56,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:56,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:52:56,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:56,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:52:56,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:56,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:52:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:56,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:56,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-15 19:52:56,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026045844] [2020-10-15 19:52:56,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 19:52:56,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:56,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 19:52:56,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:52:56,489 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-15 19:52:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:56,575 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-15 19:52:56,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:52:56,575 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-15 19:52:56,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:56,577 INFO L225 Difference]: With dead ends: 122 [2020-10-15 19:52:56,577 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 19:52:56,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:52:56,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 19:52:56,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-15 19:52:56,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 19:52:56,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-15 19:52:56,582 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-15 19:52:56,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:56,583 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-15 19:52:56,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 19:52:56,583 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-15 19:52:56,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:56,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:56,584 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:56,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 19:52:56,795 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:56,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:56,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-15 19:52:56,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:56,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965496957] [2020-10-15 19:52:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:56,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965496957] [2020-10-15 19:52:56,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791592104] [2020-10-15 19:52:56,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:56,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:52:56,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:56,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:52:56,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:56,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:56,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:52:56,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399728632] [2020-10-15 19:52:56,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:52:56,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:56,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:52:56,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:56,999 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-15 19:52:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:57,039 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 19:52:57,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:52:57,040 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 19:52:57,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:57,041 INFO L225 Difference]: With dead ends: 108 [2020-10-15 19:52:57,041 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 19:52:57,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 19:52:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-15 19:52:57,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 19:52:57,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-15 19:52:57,046 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-15 19:52:57,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:57,046 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-15 19:52:57,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:52:57,047 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-15 19:52:57,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:57,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:57,047 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:57,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:57,248 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:57,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:57,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-15 19:52:57,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:57,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028028297] [2020-10-15 19:52:57,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:57,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028028297] [2020-10-15 19:52:57,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928739800] [2020-10-15 19:52:57,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:57,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:52:57,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:57,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:57,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:52:57,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949576936] [2020-10-15 19:52:57,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:52:57,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:57,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:52:57,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:57,435 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-15 19:52:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:57,488 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-15 19:52:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:52:57,489 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 19:52:57,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:57,490 INFO L225 Difference]: With dead ends: 116 [2020-10-15 19:52:57,490 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 19:52:57,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:52:57,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 19:52:57,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-15 19:52:57,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 19:52:57,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-15 19:52:57,495 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-15 19:52:57,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:57,495 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-15 19:52:57,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:52:57,495 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-15 19:52:57,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:57,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:57,496 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:57,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 19:52:57,697 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:57,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:57,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-15 19:52:57,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:57,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200701100] [2020-10-15 19:52:57,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:57,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200701100] [2020-10-15 19:52:57,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442020543] [2020-10-15 19:52:57,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:57,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:52:57,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:57,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:52:57,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:57,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:57,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:52:57,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139275774] [2020-10-15 19:52:57,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:52:57,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:57,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:52:57,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:57,915 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-15 19:52:58,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:58,001 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-15 19:52:58,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:52:58,001 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 19:52:58,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:58,002 INFO L225 Difference]: With dead ends: 115 [2020-10-15 19:52:58,002 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 19:52:58,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:52:58,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 19:52:58,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-15 19:52:58,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 19:52:58,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-15 19:52:58,009 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-15 19:52:58,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:58,009 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-15 19:52:58,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:52:58,009 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-15 19:52:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:58,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:58,010 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:58,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 19:52:58,221 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:58,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:58,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-15 19:52:58,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:58,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584966408] [2020-10-15 19:52:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:58,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584966408] [2020-10-15 19:52:58,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213304045] [2020-10-15 19:52:58,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:58,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:52:58,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:58,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:52:58,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:58,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:52:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:58,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:58,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:52:58,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315248236] [2020-10-15 19:52:58,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:52:58,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:58,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:52:58,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:58,395 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-15 19:52:58,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:58,508 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-15 19:52:58,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:52:58,509 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 19:52:58,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:58,510 INFO L225 Difference]: With dead ends: 124 [2020-10-15 19:52:58,511 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 19:52:58,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:52:58,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 19:52:58,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-15 19:52:58,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 19:52:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-15 19:52:58,516 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-15 19:52:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:58,517 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-15 19:52:58,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:52:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-15 19:52:58,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:52:58,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:58,518 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:58,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 19:52:58,731 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:58,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:58,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-15 19:52:58,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:58,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596660783] [2020-10-15 19:52:58,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:58,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596660783] [2020-10-15 19:52:58,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003921109] [2020-10-15 19:52:58,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:58,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:52:58,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:58,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:52:58,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:58,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:58,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:52:58,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953840058] [2020-10-15 19:52:58,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:52:58,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:58,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:52:58,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:58,988 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-15 19:52:59,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:59,029 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-15 19:52:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:52:59,029 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:52:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:59,031 INFO L225 Difference]: With dead ends: 113 [2020-10-15 19:52:59,031 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 19:52:59,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 19:52:59,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-15 19:52:59,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 19:52:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-15 19:52:59,035 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-15 19:52:59,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:59,035 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-15 19:52:59,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:52:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-15 19:52:59,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:52:59,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:59,036 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:59,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 19:52:59,246 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:59,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:59,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-15 19:52:59,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:59,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70617971] [2020-10-15 19:52:59,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:59,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70617971] [2020-10-15 19:52:59,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590254475] [2020-10-15 19:52:59,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:59,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:52:59,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:59,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:52:59,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:59,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:59,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:52:59,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883571821] [2020-10-15 19:52:59,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:52:59,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:59,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:52:59,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:59,421 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-15 19:52:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:59,483 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-15 19:52:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:52:59,485 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:52:59,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:59,486 INFO L225 Difference]: With dead ends: 118 [2020-10-15 19:52:59,487 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 19:52:59,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:52:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 19:52:59,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-15 19:52:59,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 19:52:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-15 19:52:59,491 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-15 19:52:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:59,491 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-15 19:52:59,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:52:59,492 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-15 19:52:59,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:52:59,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:59,492 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:59,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:59,704 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:59,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:59,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-15 19:52:59,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:59,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332256070] [2020-10-15 19:52:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:59,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332256070] [2020-10-15 19:52:59,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088339995] [2020-10-15 19:52:59,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:59,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:52:59,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:59,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:59,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:52:59,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453747693] [2020-10-15 19:52:59,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:52:59,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:59,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:52:59,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:59,949 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-15 19:53:00,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:00,042 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-15 19:53:00,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:00,043 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:00,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:00,045 INFO L225 Difference]: With dead ends: 119 [2020-10-15 19:53:00,045 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 19:53:00,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:00,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 19:53:00,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-15 19:53:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 19:53:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-15 19:53:00,051 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-15 19:53:00,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:00,052 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-15 19:53:00,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:00,052 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-15 19:53:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:00,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:00,053 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:00,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:00,264 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:00,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:00,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-15 19:53:00,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:00,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539266561] [2020-10-15 19:53:00,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:00,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539266561] [2020-10-15 19:53:00,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428960500] [2020-10-15 19:53:00,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:00,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:00,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:00,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:00,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:00,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:00,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:00,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607210398] [2020-10-15 19:53:00,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:00,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:00,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:00,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:00,501 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-15 19:53:00,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:00,554 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-15 19:53:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:00,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:00,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:00,556 INFO L225 Difference]: With dead ends: 122 [2020-10-15 19:53:00,556 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 19:53:00,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:53:00,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 19:53:00,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-15 19:53:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 19:53:00,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-15 19:53:00,560 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-15 19:53:00,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:00,562 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-15 19:53:00,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:00,562 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-15 19:53:00,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:00,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:00,563 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:00,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-15 19:53:00,764 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:00,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:00,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-15 19:53:00,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:00,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661037898] [2020-10-15 19:53:00,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:00,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661037898] [2020-10-15 19:53:00,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078427005] [2020-10-15 19:53:00,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:00,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:00,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:00,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:00,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:01,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:01,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224454711] [2020-10-15 19:53:01,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:01,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:01,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:01,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:01,012 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-15 19:53:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:01,101 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-15 19:53:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:01,102 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:01,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:01,103 INFO L225 Difference]: With dead ends: 123 [2020-10-15 19:53:01,103 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 19:53:01,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 19:53:01,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-15 19:53:01,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 19:53:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-15 19:53:01,108 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-15 19:53:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:01,108 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-15 19:53:01,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-15 19:53:01,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:01,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:01,109 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:01,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:01,310 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:01,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:01,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-15 19:53:01,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:01,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676955414] [2020-10-15 19:53:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676955414] [2020-10-15 19:53:01,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253039197] [2020-10-15 19:53:01,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:01,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:01,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:01,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:01,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:01,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:01,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036885465] [2020-10-15 19:53:01,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:01,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:01,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:01,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:01,536 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-15 19:53:01,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:01,617 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 19:53:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:01,617 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:01,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:01,618 INFO L225 Difference]: With dead ends: 123 [2020-10-15 19:53:01,618 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 19:53:01,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:01,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 19:53:01,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-15 19:53:01,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 19:53:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-15 19:53:01,623 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-15 19:53:01,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:01,623 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-15 19:53:01,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:01,623 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-15 19:53:01,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:01,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:01,624 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:01,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 19:53:01,834 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:01,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:01,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-15 19:53:01,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:01,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498035951] [2020-10-15 19:53:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498035951] [2020-10-15 19:53:01,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692232804] [2020-10-15 19:53:01,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:01,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:01,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:01,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:01,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:02,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:02,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:02,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:02,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6367613] [2020-10-15 19:53:02,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:02,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:02,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:02,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:02,042 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-15 19:53:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:02,213 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-15 19:53:02,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:02,214 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:02,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:02,216 INFO L225 Difference]: With dead ends: 133 [2020-10-15 19:53:02,216 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 19:53:02,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:02,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 19:53:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-15 19:53:02,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 19:53:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-15 19:53:02,220 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-15 19:53:02,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:02,220 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-15 19:53:02,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:02,221 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-15 19:53:02,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:02,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:02,221 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:02,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:02,431 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:02,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:02,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-15 19:53:02,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:02,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70354999] [2020-10-15 19:53:02,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:02,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:02,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70354999] [2020-10-15 19:53:02,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260753678] [2020-10-15 19:53:02,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:02,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:02,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:02,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:02,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:02,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:02,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:02,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791348621] [2020-10-15 19:53:02,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:02,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:02,609 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-15 19:53:02,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:02,729 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-15 19:53:02,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:02,730 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:02,732 INFO L225 Difference]: With dead ends: 127 [2020-10-15 19:53:02,732 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 19:53:02,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:02,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 19:53:02,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-15 19:53:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 19:53:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 19:53:02,738 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 19:53:02,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:02,739 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 19:53:02,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:02,739 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 19:53:02,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:02,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:02,740 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:02,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 19:53:02,953 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-15 19:53:02,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:02,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594125622] [2020-10-15 19:53:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594125622] [2020-10-15 19:53:03,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711354048] [2020-10-15 19:53:03,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:03,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:03,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:03,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:03,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:03,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752295380] [2020-10-15 19:53:03,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:03,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:03,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:03,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:03,119 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 19:53:03,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:03,364 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-15 19:53:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:03,364 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:03,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:03,365 INFO L225 Difference]: With dead ends: 141 [2020-10-15 19:53:03,366 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 19:53:03,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:03,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 19:53:03,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-15 19:53:03,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 19:53:03,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 19:53:03,371 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 19:53:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:03,372 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 19:53:03,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:03,372 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 19:53:03,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:03,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:03,373 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:03,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 19:53:03,576 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:03,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:03,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-15 19:53:03,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:03,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164954093] [2020-10-15 19:53:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164954093] [2020-10-15 19:53:03,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947002514] [2020-10-15 19:53:03,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:03,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:03,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:03,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:03,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:03,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:03,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:03,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001598984] [2020-10-15 19:53:03,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:03,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:03,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:03,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:03,756 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 19:53:03,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:03,922 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-15 19:53:03,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:03,922 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:03,923 INFO L225 Difference]: With dead ends: 136 [2020-10-15 19:53:03,923 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 19:53:03,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:03,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 19:53:03,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-15 19:53:03,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 19:53:03,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-15 19:53:03,929 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-15 19:53:03,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:03,929 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-15 19:53:03,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:03,929 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-15 19:53:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:03,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:03,930 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:04,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-15 19:53:04,138 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:04,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:04,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-15 19:53:04,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:04,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893069234] [2020-10-15 19:53:04,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:04,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893069234] [2020-10-15 19:53:04,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628348271] [2020-10-15 19:53:04,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:04,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:04,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:04,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:04,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:04,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:04,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:04,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812100458] [2020-10-15 19:53:04,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:04,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:04,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:04,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:04,313 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-15 19:53:04,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:04,416 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-15 19:53:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:04,420 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:04,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:04,421 INFO L225 Difference]: With dead ends: 130 [2020-10-15 19:53:04,421 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 19:53:04,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:04,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 19:53:04,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-15 19:53:04,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 19:53:04,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 19:53:04,427 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 19:53:04,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:04,428 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 19:53:04,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:04,428 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 19:53:04,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:04,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:04,429 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:04,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 19:53:04,638 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:04,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:04,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-15 19:53:04,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:04,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631499356] [2020-10-15 19:53:04,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:04,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631499356] [2020-10-15 19:53:04,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920703231] [2020-10-15 19:53:04,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:04,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:04,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:04,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:04,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:04,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:04,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:04,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419822080] [2020-10-15 19:53:04,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:04,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:04,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:04,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:04,802 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 19:53:04,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:04,933 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-15 19:53:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:04,934 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:04,935 INFO L225 Difference]: With dead ends: 131 [2020-10-15 19:53:04,935 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 19:53:04,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:04,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 19:53:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-15 19:53:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 19:53:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 19:53:04,943 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 19:53:04,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:04,943 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 19:53:04,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:04,944 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 19:53:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:04,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:04,944 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:05,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 19:53:05,145 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:05,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:05,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-15 19:53:05,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:05,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153415284] [2020-10-15 19:53:05,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:05,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153415284] [2020-10-15 19:53:05,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088564054] [2020-10-15 19:53:05,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:05,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:05,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:05,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:05,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:05,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:05,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:05,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:05,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544297741] [2020-10-15 19:53:05,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:05,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:05,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:05,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:05,314 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 19:53:05,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:05,451 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-15 19:53:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:05,451 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:05,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:05,452 INFO L225 Difference]: With dead ends: 131 [2020-10-15 19:53:05,453 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 19:53:05,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 19:53:05,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-15 19:53:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 19:53:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 19:53:05,457 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 19:53:05,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:05,458 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 19:53:05,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:05,458 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 19:53:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:05,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:05,459 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:05,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:05,670 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:05,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:05,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-15 19:53:05,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:05,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784088463] [2020-10-15 19:53:05,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:05,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784088463] [2020-10-15 19:53:05,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289312729] [2020-10-15 19:53:05,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:05,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:05,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:05,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:05,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:05,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:05,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:05,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:05,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367502478] [2020-10-15 19:53:05,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:05,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:05,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:05,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:05,825 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 19:53:06,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:06,043 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-15 19:53:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:06,043 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:06,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:06,044 INFO L225 Difference]: With dead ends: 145 [2020-10-15 19:53:06,045 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 19:53:06,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:06,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 19:53:06,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-15 19:53:06,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 19:53:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 19:53:06,050 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 19:53:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:06,050 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 19:53:06,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:06,050 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 19:53:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:06,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:06,051 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:06,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-15 19:53:06,259 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:06,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:06,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-15 19:53:06,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:06,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298654296] [2020-10-15 19:53:06,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:06,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298654296] [2020-10-15 19:53:06,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703996841] [2020-10-15 19:53:06,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:06,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:06,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:06,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:06,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:06,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:06,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398516086] [2020-10-15 19:53:06,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:06,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:06,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:06,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:06,409 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 19:53:06,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:06,585 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-15 19:53:06,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:06,586 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:06,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:06,587 INFO L225 Difference]: With dead ends: 135 [2020-10-15 19:53:06,587 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 19:53:06,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:06,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 19:53:06,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-15 19:53:06,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 19:53:06,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-15 19:53:06,591 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-15 19:53:06,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:06,592 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-15 19:53:06,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:06,592 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-15 19:53:06,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:06,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:06,592 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:06,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:06,793 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:06,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:06,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-15 19:53:06,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:06,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491041049] [2020-10-15 19:53:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:06,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491041049] [2020-10-15 19:53:06,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97643382] [2020-10-15 19:53:06,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:06,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:06,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:06,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:06,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:06,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:07,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:07,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-15 19:53:07,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887356478] [2020-10-15 19:53:07,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 19:53:07,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:07,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 19:53:07,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:07,004 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-15 19:53:07,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:07,119 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-15 19:53:07,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:07,119 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-15 19:53:07,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:07,120 INFO L225 Difference]: With dead ends: 143 [2020-10-15 19:53:07,120 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 19:53:07,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:07,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 19:53:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-15 19:53:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 19:53:07,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-15 19:53:07,125 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-15 19:53:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:07,126 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-15 19:53:07,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 19:53:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-15 19:53:07,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:07,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:07,126 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:07,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-15 19:53:07,336 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-15 19:53:07,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:07,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289816151] [2020-10-15 19:53:07,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:07,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289816151] [2020-10-15 19:53:07,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324061533] [2020-10-15 19:53:07,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:07,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:07,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:07,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:07,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:07,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:07,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:07,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542567579] [2020-10-15 19:53:07,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:07,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:07,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:07,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:07,661 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-15 19:53:07,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:07,700 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-15 19:53:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:07,701 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:07,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:07,702 INFO L225 Difference]: With dead ends: 132 [2020-10-15 19:53:07,702 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 19:53:07,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:07,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 19:53:07,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-15 19:53:07,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 19:53:07,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 19:53:07,707 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 19:53:07,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:07,708 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 19:53:07,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 19:53:07,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:07,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:07,709 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:07,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 19:53:07,920 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:07,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-15 19:53:07,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:07,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473407916] [2020-10-15 19:53:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:08,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473407916] [2020-10-15 19:53:08,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512883160] [2020-10-15 19:53:08,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:08,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:08,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:08,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:08,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:08,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:08,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:08,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5949703] [2020-10-15 19:53:08,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:08,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:08,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:08,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:08,179 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 19:53:08,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:08,240 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-15 19:53:08,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:08,242 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:08,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:08,243 INFO L225 Difference]: With dead ends: 143 [2020-10-15 19:53:08,243 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 19:53:08,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:08,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 19:53:08,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-15 19:53:08,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 19:53:08,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 19:53:08,247 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 19:53:08,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:08,247 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 19:53:08,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:08,247 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 19:53:08,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:08,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:08,248 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:08,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-15 19:53:08,459 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:08,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:08,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-15 19:53:08,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:08,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159673585] [2020-10-15 19:53:08,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:08,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159673585] [2020-10-15 19:53:08,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597760794] [2020-10-15 19:53:08,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:08,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:53:08,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:08,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:08,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:08,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:08,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:08,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665951921] [2020-10-15 19:53:08,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:08,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:08,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:08,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:08,656 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 19:53:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:08,734 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-15 19:53:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:08,735 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:08,736 INFO L225 Difference]: With dead ends: 142 [2020-10-15 19:53:08,737 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 19:53:08,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 19:53:08,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-15 19:53:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 19:53:08,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-15 19:53:08,741 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-15 19:53:08,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:08,741 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-15 19:53:08,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:08,741 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-15 19:53:08,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:08,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:08,742 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:08,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 19:53:08,952 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:08,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-15 19:53:08,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:08,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659200422] [2020-10-15 19:53:08,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:09,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659200422] [2020-10-15 19:53:09,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690285504] [2020-10-15 19:53:09,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:09,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:09,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:09,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:09,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:09,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620074296] [2020-10-15 19:53:09,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:09,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:09,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:09,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:09,144 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-15 19:53:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:09,245 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-15 19:53:09,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:09,245 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:09,247 INFO L225 Difference]: With dead ends: 141 [2020-10-15 19:53:09,247 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 19:53:09,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 19:53:09,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-15 19:53:09,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 19:53:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-15 19:53:09,251 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-15 19:53:09,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:09,251 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-15 19:53:09,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:09,251 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-15 19:53:09,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:09,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:09,252 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:09,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 19:53:09,456 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:09,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:09,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-15 19:53:09,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:09,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47080843] [2020-10-15 19:53:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:09,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47080843] [2020-10-15 19:53:09,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965749889] [2020-10-15 19:53:09,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:09,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:09,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:09,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:09,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:09,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:09,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:09,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:09,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351222849] [2020-10-15 19:53:09,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:09,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:09,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:09,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:09,647 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-15 19:53:09,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:09,800 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 19:53:09,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:09,801 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:09,802 INFO L225 Difference]: With dead ends: 150 [2020-10-15 19:53:09,802 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 19:53:09,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:09,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 19:53:09,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-15 19:53:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-15 19:53:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-15 19:53:09,806 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-15 19:53:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:09,806 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-15 19:53:09,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-15 19:53:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:09,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:09,807 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:10,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:10,016 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:10,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:10,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-15 19:53:10,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:10,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612098473] [2020-10-15 19:53:10,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:10,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612098473] [2020-10-15 19:53:10,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794502258] [2020-10-15 19:53:10,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:10,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:10,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:10,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:10,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:10,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:10,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:10,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601390014] [2020-10-15 19:53:10,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:10,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:10,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:10,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:10,211 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-15 19:53:10,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:10,253 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-15 19:53:10,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:10,253 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:10,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:10,254 INFO L225 Difference]: With dead ends: 138 [2020-10-15 19:53:10,254 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 19:53:10,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:10,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 19:53:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-15 19:53:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-15 19:53:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-15 19:53:10,258 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-15 19:53:10,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:10,258 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-15 19:53:10,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-15 19:53:10,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:10,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:10,259 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:10,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 19:53:10,470 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:10,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:10,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-15 19:53:10,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:10,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304497982] [2020-10-15 19:53:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:10,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304497982] [2020-10-15 19:53:10,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548359941] [2020-10-15 19:53:10,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:10,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:10,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:10,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:10,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:10,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:10,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:10,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285918266] [2020-10-15 19:53:10,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:10,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:10,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:10,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:10,699 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-15 19:53:10,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:10,806 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-15 19:53:10,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:10,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:10,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:10,808 INFO L225 Difference]: With dead ends: 145 [2020-10-15 19:53:10,808 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 19:53:10,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 19:53:10,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-15 19:53:10,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-15 19:53:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-15 19:53:10,813 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-15 19:53:10,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:10,813 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-15 19:53:10,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-15 19:53:10,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:10,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:10,814 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:11,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 19:53:11,025 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:11,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:11,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-15 19:53:11,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:11,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421022293] [2020-10-15 19:53:11,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:11,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421022293] [2020-10-15 19:53:11,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616706937] [2020-10-15 19:53:11,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:11,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:11,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:11,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:11,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:11,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:11,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:11,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170793743] [2020-10-15 19:53:11,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:11,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:11,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:11,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:11,221 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-15 19:53:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:11,354 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 19:53:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:11,355 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:11,357 INFO L225 Difference]: With dead ends: 150 [2020-10-15 19:53:11,357 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 19:53:11,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:11,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 19:53:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-15 19:53:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-15 19:53:11,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-15 19:53:11,361 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-15 19:53:11,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:11,362 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-15 19:53:11,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:11,362 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-15 19:53:11,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:11,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:11,363 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:11,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:11,563 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:11,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:11,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-15 19:53:11,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:11,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733741552] [2020-10-15 19:53:11,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:11,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733741552] [2020-10-15 19:53:11,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568688091] [2020-10-15 19:53:11,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:11,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:11,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:11,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:11,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:11,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:11,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:11,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:11,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434280571] [2020-10-15 19:53:11,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:11,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:11,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:11,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:11,773 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-15 19:53:11,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:11,897 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-15 19:53:11,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:11,897 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:11,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:11,898 INFO L225 Difference]: With dead ends: 148 [2020-10-15 19:53:11,899 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 19:53:11,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:11,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 19:53:11,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-15 19:53:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 19:53:11,903 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 19:53:11,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:11,903 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 19:53:11,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:11,903 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 19:53:11,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:11,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:11,904 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:12,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 19:53:12,114 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:12,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:12,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-15 19:53:12,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:12,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251462005] [2020-10-15 19:53:12,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:12,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251462005] [2020-10-15 19:53:12,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237180592] [2020-10-15 19:53:12,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:12,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:12,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:12,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:12,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:12,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:12,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:12,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851389443] [2020-10-15 19:53:12,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:12,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:12,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:12,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:12,318 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 19:53:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:12,438 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-15 19:53:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:12,438 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:12,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:12,440 INFO L225 Difference]: With dead ends: 149 [2020-10-15 19:53:12,440 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 19:53:12,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 19:53:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-15 19:53:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-15 19:53:12,444 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-15 19:53:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:12,444 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-15 19:53:12,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-15 19:53:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:12,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:12,445 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:12,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:12,657 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:12,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:12,657 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-15 19:53:12,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:12,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255732079] [2020-10-15 19:53:12,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:12,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255732079] [2020-10-15 19:53:12,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164102583] [2020-10-15 19:53:12,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:12,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:12,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:12,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:12,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:12,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884178433] [2020-10-15 19:53:12,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:12,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:12,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:12,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:12,913 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-15 19:53:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:12,972 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-15 19:53:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:12,972 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:12,973 INFO L225 Difference]: With dead ends: 152 [2020-10-15 19:53:12,973 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 19:53:12,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:12,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 19:53:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-15 19:53:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 19:53:12,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-15 19:53:12,978 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-15 19:53:12,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:12,978 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-15 19:53:12,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:12,979 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-15 19:53:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:12,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:12,979 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:13,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 19:53:13,189 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:13,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:13,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-15 19:53:13,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:13,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006748232] [2020-10-15 19:53:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:13,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006748232] [2020-10-15 19:53:13,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875794263] [2020-10-15 19:53:13,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:13,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:13,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:13,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:13,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:13,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:13,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:13,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619490527] [2020-10-15 19:53:13,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:13,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:13,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:13,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:13,418 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-15 19:53:13,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:13,551 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-15 19:53:13,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:13,552 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:13,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:13,553 INFO L225 Difference]: With dead ends: 153 [2020-10-15 19:53:13,554 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 19:53:13,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 19:53:13,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-15 19:53:13,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 19:53:13,559 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 19:53:13,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:13,559 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 19:53:13,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:13,559 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 19:53:13,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:13,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:13,560 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:13,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-15 19:53:13,769 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:13,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:13,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-15 19:53:13,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:13,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080913786] [2020-10-15 19:53:13,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:13,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080913786] [2020-10-15 19:53:13,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951931093] [2020-10-15 19:53:13,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:13,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:13,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:13,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:13,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:13,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:13,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:13,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553672403] [2020-10-15 19:53:13,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:13,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:13,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:13,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:13,963 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 19:53:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:14,107 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 19:53:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:14,108 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:14,109 INFO L225 Difference]: With dead ends: 156 [2020-10-15 19:53:14,109 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 19:53:14,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 19:53:14,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-15 19:53:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 19:53:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-15 19:53:14,114 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-15 19:53:14,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:14,114 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-15 19:53:14,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-15 19:53:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:14,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:14,115 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:14,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 19:53:14,326 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:14,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:14,327 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-15 19:53:14,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:14,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229387618] [2020-10-15 19:53:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:14,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229387618] [2020-10-15 19:53:14,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192834302] [2020-10-15 19:53:14,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:14,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:14,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:14,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:14,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:14,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:14,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:14,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767384195] [2020-10-15 19:53:14,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:14,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:14,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:14,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:14,544 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-15 19:53:14,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:14,625 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-15 19:53:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:14,626 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:14,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:14,628 INFO L225 Difference]: With dead ends: 148 [2020-10-15 19:53:14,628 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 19:53:14,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:14,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 19:53:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-15 19:53:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 19:53:14,632 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 19:53:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:14,632 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 19:53:14,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 19:53:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:14,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:14,633 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:14,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-15 19:53:14,839 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:14,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:14,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-15 19:53:14,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:14,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792369133] [2020-10-15 19:53:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:14,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792369133] [2020-10-15 19:53:14,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112693134] [2020-10-15 19:53:14,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:14,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:14,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:14,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:14,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:15,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:15,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:15,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735052769] [2020-10-15 19:53:15,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:15,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:15,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:15,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:15,045 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 19:53:15,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:15,192 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-15 19:53:15,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:15,193 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:15,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:15,195 INFO L225 Difference]: With dead ends: 157 [2020-10-15 19:53:15,195 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 19:53:15,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 19:53:15,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-15 19:53:15,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-15 19:53:15,199 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-15 19:53:15,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:15,199 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-15 19:53:15,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:15,199 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-15 19:53:15,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:15,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:15,200 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:15,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:15,408 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:15,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:15,409 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-15 19:53:15,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:15,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130527276] [2020-10-15 19:53:15,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:15,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130527276] [2020-10-15 19:53:15,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280877983] [2020-10-15 19:53:15,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:15,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:15,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:15,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:53:15,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:15,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:15,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 19:53:15,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290260774] [2020-10-15 19:53:15,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:53:15,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:15,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:53:15,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:53:15,534 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-10-15 19:53:15,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:15,616 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-15 19:53:15,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:15,620 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 19:53:15,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:15,621 INFO L225 Difference]: With dead ends: 149 [2020-10-15 19:53:15,622 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 19:53:15,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:53:15,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 19:53:15,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-15 19:53:15,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 19:53:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 19:53:15,626 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 19:53:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:15,626 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 19:53:15,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:53:15,626 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 19:53:15,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:15,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:15,627 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:15,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 19:53:15,836 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:15,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:15,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-15 19:53:15,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:15,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102603581] [2020-10-15 19:53:15,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:15,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102603581] [2020-10-15 19:53:15,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077815375] [2020-10-15 19:53:15,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:15,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:15,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:16,007 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:16,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:16,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:16,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15388351] [2020-10-15 19:53:16,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:16,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:16,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:16,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:16,044 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 19:53:16,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:16,294 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-15 19:53:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:16,295 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:16,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:16,297 INFO L225 Difference]: With dead ends: 164 [2020-10-15 19:53:16,297 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 19:53:16,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:16,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 19:53:16,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 19:53:16,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 19:53:16,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-15 19:53:16,300 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-15 19:53:16,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:16,300 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-15 19:53:16,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:16,300 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-15 19:53:16,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:16,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:16,301 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:16,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 19:53:16,503 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:16,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:16,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-15 19:53:16,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:16,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976596116] [2020-10-15 19:53:16,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:16,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976596116] [2020-10-15 19:53:16,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722791378] [2020-10-15 19:53:16,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:16,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:16,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:16,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:16,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:16,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:16,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:16,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248922978] [2020-10-15 19:53:16,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:16,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:16,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:16,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:16,712 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-15 19:53:16,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:16,878 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 19:53:16,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:16,878 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:16,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:16,879 INFO L225 Difference]: With dead ends: 156 [2020-10-15 19:53:16,879 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 19:53:16,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:16,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 19:53:16,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-15 19:53:16,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 19:53:16,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 19:53:16,883 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 19:53:16,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:16,883 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 19:53:16,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:16,884 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 19:53:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:16,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:16,884 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:17,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:17,095 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:17,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:17,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-15 19:53:17,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:17,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425278504] [2020-10-15 19:53:17,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:17,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425278504] [2020-10-15 19:53:17,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246284144] [2020-10-15 19:53:17,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:17,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:17,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:17,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:17,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:17,272 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:17,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:17,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:17,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491753951] [2020-10-15 19:53:17,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:17,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:17,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:17,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:17,309 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 19:53:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:17,642 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-15 19:53:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:53:17,643 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:17,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:17,645 INFO L225 Difference]: With dead ends: 176 [2020-10-15 19:53:17,645 INFO L226 Difference]: Without dead ends: 171 [2020-10-15 19:53:17,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:53:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-15 19:53:17,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-15 19:53:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 19:53:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 19:53:17,649 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 19:53:17,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:17,650 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 19:53:17,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:17,650 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 19:53:17,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:17,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:17,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:17,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-15 19:53:17,862 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:17,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-15 19:53:17,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:17,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044431700] [2020-10-15 19:53:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:17,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044431700] [2020-10-15 19:53:17,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447317595] [2020-10-15 19:53:17,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:17,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:17,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:17,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:17,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:18,035 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:18,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:18,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:18,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001114142] [2020-10-15 19:53:18,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:18,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:18,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:18,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:18,060 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 19:53:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:18,283 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-15 19:53:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:18,284 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:18,286 INFO L225 Difference]: With dead ends: 166 [2020-10-15 19:53:18,286 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 19:53:18,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:18,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 19:53:18,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-15 19:53:18,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:18,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-15 19:53:18,290 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-15 19:53:18,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:18,290 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-15 19:53:18,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:18,291 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-15 19:53:18,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:18,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:18,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:18,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:18,502 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:18,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-15 19:53:18,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:18,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051737994] [2020-10-15 19:53:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:18,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051737994] [2020-10-15 19:53:18,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667328959] [2020-10-15 19:53:18,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:18,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:18,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:18,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:18,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:18,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:18,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:18,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416890103] [2020-10-15 19:53:18,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:18,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:18,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:18,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:18,681 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-15 19:53:18,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:18,833 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-15 19:53:18,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:18,834 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:18,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:18,835 INFO L225 Difference]: With dead ends: 163 [2020-10-15 19:53:18,835 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 19:53:18,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:18,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 19:53:18,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-15 19:53:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-15 19:53:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-15 19:53:18,839 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-15 19:53:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:18,840 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-15 19:53:18,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-15 19:53:18,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:18,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:18,841 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:19,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 19:53:19,051 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:19,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:19,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-15 19:53:19,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:19,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223527852] [2020-10-15 19:53:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:19,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223527852] [2020-10-15 19:53:19,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383645813] [2020-10-15 19:53:19,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:19,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:19,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:19,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:19,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:19,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:19,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:19,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039808264] [2020-10-15 19:53:19,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:19,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:19,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:19,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:19,262 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-15 19:53:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:19,516 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-15 19:53:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:19,517 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:19,518 INFO L225 Difference]: With dead ends: 170 [2020-10-15 19:53:19,518 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 19:53:19,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:53:19,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 19:53:19,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-15 19:53:19,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-15 19:53:19,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-15 19:53:19,523 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-15 19:53:19,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:19,523 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-15 19:53:19,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:19,523 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-15 19:53:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:19,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:19,523 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:19,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:19,724 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:19,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:19,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-15 19:53:19,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:19,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102819257] [2020-10-15 19:53:19,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:19,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102819257] [2020-10-15 19:53:19,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572530121] [2020-10-15 19:53:19,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:19,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:19,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:19,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:19,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:19,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:19,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016736976] [2020-10-15 19:53:19,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:19,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:19,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:19,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:19,895 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-15 19:53:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:20,196 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-15 19:53:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:20,197 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:20,198 INFO L225 Difference]: With dead ends: 177 [2020-10-15 19:53:20,198 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 19:53:20,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:53:20,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 19:53:20,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-15 19:53:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-15 19:53:20,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-15 19:53:20,202 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-15 19:53:20,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:20,203 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-15 19:53:20,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:20,203 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-15 19:53:20,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:20,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:20,203 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:20,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 19:53:20,413 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:20,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:20,414 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-15 19:53:20,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:20,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744898342] [2020-10-15 19:53:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:20,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744898342] [2020-10-15 19:53:20,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612905082] [2020-10-15 19:53:20,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:20,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:20,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:20,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:20,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:20,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:20,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:20,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:20,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918126741] [2020-10-15 19:53:20,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:20,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:20,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:20,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:20,601 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-15 19:53:20,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:20,936 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-15 19:53:20,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:53:20,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:20,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:20,938 INFO L225 Difference]: With dead ends: 190 [2020-10-15 19:53:20,938 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 19:53:20,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:53:20,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 19:53:20,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-15 19:53:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-15 19:53:20,942 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-15 19:53:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:20,942 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-15 19:53:20,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-15 19:53:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:20,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:20,943 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:21,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 19:53:21,144 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:21,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:21,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-15 19:53:21,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:21,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048635930] [2020-10-15 19:53:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:21,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048635930] [2020-10-15 19:53:21,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529893909] [2020-10-15 19:53:21,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:21,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:53:21,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:21,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:21,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:21,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:21,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:21,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:21,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870823981] [2020-10-15 19:53:21,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:21,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:21,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:21,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:21,323 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-15 19:53:21,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:21,689 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-15 19:53:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:21,689 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:21,691 INFO L225 Difference]: With dead ends: 180 [2020-10-15 19:53:21,691 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 19:53:21,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:53:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 19:53:21,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-15 19:53:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:21,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-15 19:53:21,694 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-15 19:53:21,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:21,694 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-15 19:53:21,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:21,694 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-15 19:53:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:21,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:21,695 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:21,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 19:53:21,895 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:21,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:21,896 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-15 19:53:21,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:21,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946616849] [2020-10-15 19:53:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:21,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946616849] [2020-10-15 19:53:21,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438020623] [2020-10-15 19:53:21,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:21,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:21,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:21,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:21,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:22,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:22,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:22,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768456919] [2020-10-15 19:53:22,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:22,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:22,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:22,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:22,078 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-15 19:53:22,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:22,225 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-15 19:53:22,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:22,226 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:22,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:22,227 INFO L225 Difference]: With dead ends: 164 [2020-10-15 19:53:22,227 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 19:53:22,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:22,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 19:53:22,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-15 19:53:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-15 19:53:22,231 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-15 19:53:22,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:22,231 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-15 19:53:22,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:22,232 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-15 19:53:22,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:22,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:22,232 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:22,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 19:53:22,434 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:22,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:22,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-15 19:53:22,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:22,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496095134] [2020-10-15 19:53:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:22,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496095134] [2020-10-15 19:53:22,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850669315] [2020-10-15 19:53:22,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:22,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:22,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:22,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:22,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:22,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:22,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:22,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183823770] [2020-10-15 19:53:22,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:22,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:22,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:22,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:22,622 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-15 19:53:22,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:22,772 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-15 19:53:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:22,773 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:22,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:22,774 INFO L225 Difference]: With dead ends: 161 [2020-10-15 19:53:22,774 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 19:53:22,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 19:53:22,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-15 19:53:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:22,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-15 19:53:22,778 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-15 19:53:22,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:22,779 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-15 19:53:22,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:22,779 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-15 19:53:22,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:22,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:22,780 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:22,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 19:53:22,989 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:22,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:22,989 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-15 19:53:22,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:22,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533412579] [2020-10-15 19:53:22,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:23,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533412579] [2020-10-15 19:53:23,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824366543] [2020-10-15 19:53:23,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:23,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:53:23,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:23,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:23,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:23,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:23,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:23,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562315807] [2020-10-15 19:53:23,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:23,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:23,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:23,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:23,179 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-15 19:53:23,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:23,372 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-15 19:53:23,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:23,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:23,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:23,374 INFO L225 Difference]: With dead ends: 165 [2020-10-15 19:53:23,374 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 19:53:23,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:23,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 19:53:23,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-15 19:53:23,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:23,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-15 19:53:23,378 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-15 19:53:23,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:23,378 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-15 19:53:23,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:23,378 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-15 19:53:23,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:23,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:23,379 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:23,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-15 19:53:23,581 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:23,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:23,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-15 19:53:23,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:23,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885649614] [2020-10-15 19:53:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:23,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885649614] [2020-10-15 19:53:23,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583198842] [2020-10-15 19:53:23,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:23,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:23,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:23,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:23,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:23,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67052906] [2020-10-15 19:53:23,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:23,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:23,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:23,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:23,785 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-15 19:53:23,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:23,992 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-15 19:53:23,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:23,993 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:23,994 INFO L225 Difference]: With dead ends: 167 [2020-10-15 19:53:23,995 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 19:53:23,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:23,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 19:53:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-15 19:53:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:23,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 19:53:23,999 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 19:53:23,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:23,999 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 19:53:23,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:23,999 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 19:53:24,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:24,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:24,000 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:24,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:24,210 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:24,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:24,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-15 19:53:24,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:24,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900617690] [2020-10-15 19:53:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:24,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900617690] [2020-10-15 19:53:24,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45377258] [2020-10-15 19:53:24,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:24,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:24,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:24,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:24,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:24,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:24,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:24,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128036779] [2020-10-15 19:53:24,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:24,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:24,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:24,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:24,392 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 19:53:24,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:24,667 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-15 19:53:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:53:24,668 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:24,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:24,669 INFO L225 Difference]: With dead ends: 168 [2020-10-15 19:53:24,669 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 19:53:24,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 19:53:24,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-15 19:53:24,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 19:53:24,673 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 19:53:24,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:24,673 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 19:53:24,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:24,674 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 19:53:24,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:24,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:24,674 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:24,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:24,875 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:24,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:24,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-15 19:53:24,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:24,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895576286] [2020-10-15 19:53:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:24,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895576286] [2020-10-15 19:53:24,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930451483] [2020-10-15 19:53:24,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:24,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:24,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:24,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:24,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:25,034 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:25,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:25,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:25,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195660270] [2020-10-15 19:53:25,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:25,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:25,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:25,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:25,046 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 19:53:25,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:25,233 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-15 19:53:25,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:25,234 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:25,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:25,235 INFO L225 Difference]: With dead ends: 160 [2020-10-15 19:53:25,235 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 19:53:25,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:25,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 19:53:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-15 19:53:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 19:53:25,238 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 19:53:25,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:25,239 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 19:53:25,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:25,239 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 19:53:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:25,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:25,240 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:25,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:25,440 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:25,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:25,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-15 19:53:25,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:25,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127996097] [2020-10-15 19:53:25,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:25,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127996097] [2020-10-15 19:53:25,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431741401] [2020-10-15 19:53:25,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:25,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:25,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:25,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:25,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:25,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:25,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:25,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:25,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915226676] [2020-10-15 19:53:25,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:25,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:25,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:25,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:25,669 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 19:53:26,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:26,025 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-15 19:53:26,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:26,026 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:26,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:26,027 INFO L225 Difference]: With dead ends: 189 [2020-10-15 19:53:26,027 INFO L226 Difference]: Without dead ends: 181 [2020-10-15 19:53:26,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:53:26,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-15 19:53:26,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-15 19:53:26,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 19:53:26,031 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 19:53:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:26,031 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 19:53:26,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 19:53:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:26,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:26,032 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:26,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:26,233 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:26,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:26,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-15 19:53:26,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:26,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833249846] [2020-10-15 19:53:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:26,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833249846] [2020-10-15 19:53:26,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776173158] [2020-10-15 19:53:26,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:26,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:26,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:26,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:26,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:26,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:26,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:26,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552236122] [2020-10-15 19:53:26,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:26,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:26,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:26,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:26,403 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 19:53:26,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:26,640 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-15 19:53:26,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:53:26,641 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:26,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:26,642 INFO L225 Difference]: With dead ends: 169 [2020-10-15 19:53:26,642 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 19:53:26,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:26,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 19:53:26,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-15 19:53:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 19:53:26,645 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 19:53:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:26,646 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 19:53:26,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 19:53:26,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:26,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:26,646 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:26,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-15 19:53:26,848 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:26,848 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-15 19:53:26,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:26,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619144698] [2020-10-15 19:53:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:26,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619144698] [2020-10-15 19:53:26,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432298256] [2020-10-15 19:53:26,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:26,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:26,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:26,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:26,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:27,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:27,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:27,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:27,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345124981] [2020-10-15 19:53:27,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:27,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:27,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:27,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:27,018 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 19:53:27,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:27,344 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-15 19:53:27,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:53:27,344 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:27,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:27,346 INFO L225 Difference]: With dead ends: 192 [2020-10-15 19:53:27,346 INFO L226 Difference]: Without dead ends: 184 [2020-10-15 19:53:27,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:53:27,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-15 19:53:27,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-15 19:53:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 19:53:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-15 19:53:27,349 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-15 19:53:27,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:27,350 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-15 19:53:27,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-15 19:53:27,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:27,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:27,350 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:27,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:27,551 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:27,552 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-15 19:53:27,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:27,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374134743] [2020-10-15 19:53:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:27,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374134743] [2020-10-15 19:53:27,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195135705] [2020-10-15 19:53:27,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:27,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:27,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:27,719 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:27,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:27,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:27,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540733956] [2020-10-15 19:53:27,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:27,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:27,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:27,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:27,730 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-15 19:53:28,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:28,051 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-15 19:53:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:28,052 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:28,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:28,053 INFO L225 Difference]: With dead ends: 180 [2020-10-15 19:53:28,053 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 19:53:28,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:53:28,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 19:53:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-15 19:53:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 19:53:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-15 19:53:28,057 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-15 19:53:28,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:28,057 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-15 19:53:28,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-15 19:53:28,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:28,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:28,058 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:28,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-15 19:53:28,261 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:28,261 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-15 19:53:28,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:28,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438793183] [2020-10-15 19:53:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:28,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438793183] [2020-10-15 19:53:28,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616950309] [2020-10-15 19:53:28,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:28,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:28,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:28,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:28,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:28,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:28,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:28,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 19:53:28,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370853332] [2020-10-15 19:53:28,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 19:53:28,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:28,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 19:53:28,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:28,508 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-15 19:53:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:28,658 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-15 19:53:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:28,658 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-15 19:53:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:28,660 INFO L225 Difference]: With dead ends: 164 [2020-10-15 19:53:28,660 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 19:53:28,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:53:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 19:53:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 19:53:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 19:53:28,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-15 19:53:28,663 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-15 19:53:28,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:28,664 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-15 19:53:28,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 19:53:28,664 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-15 19:53:28,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:28,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:28,664 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:28,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:28,869 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:28,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:28,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-15 19:53:28,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:28,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745763723] [2020-10-15 19:53:28,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:28,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745763723] [2020-10-15 19:53:28,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078881430] [2020-10-15 19:53:28,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:29,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:53:29,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:29,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:29,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:29,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:29,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:29,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298400763] [2020-10-15 19:53:29,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:29,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:29,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:29,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:29,138 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-15 19:53:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:29,186 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 19:53:29,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:29,186 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:29,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:29,188 INFO L225 Difference]: With dead ends: 156 [2020-10-15 19:53:29,188 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 19:53:29,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:29,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 19:53:29,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-15 19:53:29,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 19:53:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 19:53:29,191 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 19:53:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:29,192 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 19:53:29,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:29,192 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 19:53:29,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:29,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:29,192 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:29,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 19:53:29,400 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:29,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:29,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-15 19:53:29,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:29,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320232488] [2020-10-15 19:53:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:29,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320232488] [2020-10-15 19:53:29,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581476359] [2020-10-15 19:53:29,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:29,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:29,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:29,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:29,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:29,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:29,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:29,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212156888] [2020-10-15 19:53:29,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:29,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:29,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:29,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:29,661 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 19:53:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:29,734 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-15 19:53:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:29,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:29,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:29,737 INFO L225 Difference]: With dead ends: 170 [2020-10-15 19:53:29,737 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 19:53:29,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 19:53:29,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-15 19:53:29,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 19:53:29,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 19:53:29,741 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 19:53:29,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:29,741 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 19:53:29,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:29,741 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 19:53:29,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:29,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:29,742 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:29,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:29,952 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:29,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-15 19:53:29,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:29,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335227544] [2020-10-15 19:53:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:30,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335227544] [2020-10-15 19:53:30,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831366213] [2020-10-15 19:53:30,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:30,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:30,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:30,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:30,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:30,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:30,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:30,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604672452] [2020-10-15 19:53:30,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:30,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:30,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:30,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:30,207 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 19:53:30,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:30,299 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-15 19:53:30,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:30,300 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:30,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:30,301 INFO L225 Difference]: With dead ends: 169 [2020-10-15 19:53:30,301 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 19:53:30,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:30,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 19:53:30,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-15 19:53:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 19:53:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-15 19:53:30,305 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-15 19:53:30,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:30,305 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-15 19:53:30,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:30,305 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-15 19:53:30,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:30,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:30,306 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:30,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:30,516 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:30,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:30,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-15 19:53:30,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:30,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935363138] [2020-10-15 19:53:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:30,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935363138] [2020-10-15 19:53:30,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575255222] [2020-10-15 19:53:30,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:30,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:53:30,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:30,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:30,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:30,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:30,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:30,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879285610] [2020-10-15 19:53:30,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:30,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:30,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:30,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:30,755 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-15 19:53:30,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:30,867 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-15 19:53:30,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:30,868 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:30,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:30,869 INFO L225 Difference]: With dead ends: 168 [2020-10-15 19:53:30,869 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 19:53:30,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:30,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 19:53:30,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-15 19:53:30,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 19:53:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-15 19:53:30,874 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-15 19:53:30,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:30,874 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-15 19:53:30,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:30,874 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-15 19:53:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:30,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:30,875 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:31,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-15 19:53:31,086 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:31,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:31,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-15 19:53:31,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:31,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552641236] [2020-10-15 19:53:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:31,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552641236] [2020-10-15 19:53:31,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180510603] [2020-10-15 19:53:31,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:31,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:31,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:31,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:31,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:31,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982167865] [2020-10-15 19:53:31,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:31,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:31,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:31,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:31,360 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-15 19:53:31,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:31,518 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-15 19:53:31,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:31,518 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:31,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:31,520 INFO L225 Difference]: With dead ends: 167 [2020-10-15 19:53:31,520 INFO L226 Difference]: Without dead ends: 164 [2020-10-15 19:53:31,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-15 19:53:31,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-15 19:53:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 19:53:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-15 19:53:31,526 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-15 19:53:31,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:31,526 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-15 19:53:31,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:31,526 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-15 19:53:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:31,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:31,527 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:31,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:31,740 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:31,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:31,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-15 19:53:31,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:31,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783617009] [2020-10-15 19:53:31,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:31,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783617009] [2020-10-15 19:53:31,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149021632] [2020-10-15 19:53:31,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:31,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:31,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:31,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:31,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:32,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:32,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:32,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:32,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078051956] [2020-10-15 19:53:32,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:32,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:32,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:32,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:32,053 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-15 19:53:32,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:32,236 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-15 19:53:32,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:32,236 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:32,238 INFO L225 Difference]: With dead ends: 176 [2020-10-15 19:53:32,238 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 19:53:32,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:32,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 19:53:32,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-15 19:53:32,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 19:53:32,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-15 19:53:32,241 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-15 19:53:32,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:32,241 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-15 19:53:32,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-15 19:53:32,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:32,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:32,242 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:32,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:32,442 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:32,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:32,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-15 19:53:32,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:32,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610464314] [2020-10-15 19:53:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:32,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610464314] [2020-10-15 19:53:32,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864933042] [2020-10-15 19:53:32,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:32,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:32,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:32,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:32,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:32,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:32,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:32,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528897208] [2020-10-15 19:53:32,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:32,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:32,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:32,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:32,698 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-15 19:53:32,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:32,748 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-15 19:53:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:32,749 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:32,750 INFO L225 Difference]: With dead ends: 163 [2020-10-15 19:53:32,750 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 19:53:32,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 19:53:32,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-15 19:53:32,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 19:53:32,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-15 19:53:32,753 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-15 19:53:32,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:32,753 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-15 19:53:32,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:32,753 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-15 19:53:32,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:32,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:32,754 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:32,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-15 19:53:32,954 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:32,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:32,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-15 19:53:32,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:32,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663140243] [2020-10-15 19:53:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:33,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663140243] [2020-10-15 19:53:33,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516065253] [2020-10-15 19:53:33,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:33,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:33,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:33,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:33,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:33,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:33,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:33,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448155841] [2020-10-15 19:53:33,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:33,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:33,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:33,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:33,227 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-15 19:53:33,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:33,390 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-15 19:53:33,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:33,391 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:33,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:33,392 INFO L225 Difference]: With dead ends: 172 [2020-10-15 19:53:33,392 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 19:53:33,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:33,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 19:53:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-15 19:53:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 19:53:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 19:53:33,396 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 19:53:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:33,396 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 19:53:33,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 19:53:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:33,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:33,397 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:33,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:33,605 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:33,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:33,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-15 19:53:33,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:33,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4999654] [2020-10-15 19:53:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:33,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4999654] [2020-10-15 19:53:33,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51037616] [2020-10-15 19:53:33,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:33,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:33,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:33,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:33,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:34,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:34,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:34,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252137241] [2020-10-15 19:53:34,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:34,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:34,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:34,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:34,146 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 19:53:34,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:34,357 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 19:53:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:34,357 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:34,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:34,358 INFO L225 Difference]: With dead ends: 179 [2020-10-15 19:53:34,358 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 19:53:34,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 19:53:34,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-15 19:53:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 19:53:34,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-15 19:53:34,362 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-15 19:53:34,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:34,362 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-15 19:53:34,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:34,362 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-15 19:53:34,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:34,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:34,363 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:34,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-15 19:53:34,571 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:34,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:34,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-15 19:53:34,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:34,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527317158] [2020-10-15 19:53:34,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:34,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527317158] [2020-10-15 19:53:34,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198350728] [2020-10-15 19:53:34,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:34,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:34,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:34,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:34,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:34,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:34,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:34,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856810017] [2020-10-15 19:53:34,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:34,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:34,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:34,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:34,809 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-15 19:53:34,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:34,986 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 19:53:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:34,986 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:34,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:34,988 INFO L225 Difference]: With dead ends: 179 [2020-10-15 19:53:34,988 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 19:53:34,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:34,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 19:53:34,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-15 19:53:34,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 19:53:34,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 19:53:34,991 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 19:53:34,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:34,991 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 19:53:34,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:34,991 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 19:53:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:34,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:34,992 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:35,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 19:53:35,196 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:35,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:35,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-15 19:53:35,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:35,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547854795] [2020-10-15 19:53:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:35,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547854795] [2020-10-15 19:53:35,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456599191] [2020-10-15 19:53:35,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:35,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:35,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:35,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:35,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:35,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:35,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:35,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517926495] [2020-10-15 19:53:35,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:35,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:35,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:35,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:35,407 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 19:53:35,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:35,600 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-15 19:53:35,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:35,601 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:35,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:35,602 INFO L225 Difference]: With dead ends: 184 [2020-10-15 19:53:35,602 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 19:53:35,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:35,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 19:53:35,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-15 19:53:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 19:53:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-15 19:53:35,606 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-15 19:53:35,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:35,606 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-15 19:53:35,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-15 19:53:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:35,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:35,607 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:35,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-15 19:53:35,814 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:35,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-15 19:53:35,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:35,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030536993] [2020-10-15 19:53:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:35,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030536993] [2020-10-15 19:53:35,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004244999] [2020-10-15 19:53:35,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:35,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:35,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:36,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:36,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:36,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782787316] [2020-10-15 19:53:36,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:36,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:36,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:36,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:36,052 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-15 19:53:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:36,256 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-15 19:53:36,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:36,257 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:36,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:36,258 INFO L225 Difference]: With dead ends: 179 [2020-10-15 19:53:36,258 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 19:53:36,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 19:53:36,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-15 19:53:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-15 19:53:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-15 19:53:36,262 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-15 19:53:36,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:36,262 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-15 19:53:36,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:36,262 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-15 19:53:36,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:36,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:36,263 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:36,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:36,465 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:36,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:36,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-15 19:53:36,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:36,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929927287] [2020-10-15 19:53:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:36,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929927287] [2020-10-15 19:53:36,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803402774] [2020-10-15 19:53:36,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:36,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:36,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:36,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:36,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:36,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:36,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:36,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955204582] [2020-10-15 19:53:36,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:36,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:36,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:36,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:36,713 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-15 19:53:36,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:36,858 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-15 19:53:36,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:36,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:36,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:36,859 INFO L225 Difference]: With dead ends: 176 [2020-10-15 19:53:36,859 INFO L226 Difference]: Without dead ends: 174 [2020-10-15 19:53:36,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-15 19:53:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-15 19:53:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:53:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-15 19:53:36,862 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-15 19:53:36,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:36,863 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-15 19:53:36,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-15 19:53:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:36,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:36,863 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:37,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:37,064 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:37,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-15 19:53:37,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:37,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659135380] [2020-10-15 19:53:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:37,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659135380] [2020-10-15 19:53:37,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884617843] [2020-10-15 19:53:37,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:37,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:53:37,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:37,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:37,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:37,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:37,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:37,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724239680] [2020-10-15 19:53:37,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:37,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:37,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:37,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:37,312 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-15 19:53:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:37,519 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 19:53:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:37,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:37,521 INFO L225 Difference]: With dead ends: 185 [2020-10-15 19:53:37,521 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 19:53:37,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:37,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 19:53:37,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-15 19:53:37,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:53:37,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-15 19:53:37,525 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-15 19:53:37,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:37,525 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-15 19:53:37,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:37,525 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-15 19:53:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:37,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:37,525 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:37,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:37,726 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:37,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:37,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-15 19:53:37,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:37,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175462587] [2020-10-15 19:53:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:37,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175462587] [2020-10-15 19:53:37,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317436426] [2020-10-15 19:53:37,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:37,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:37,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:37,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:37,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:37,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:37,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:37,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284338021] [2020-10-15 19:53:37,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:37,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:37,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:37,992 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-15 19:53:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:38,196 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 19:53:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:38,197 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:38,198 INFO L225 Difference]: With dead ends: 185 [2020-10-15 19:53:38,198 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 19:53:38,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:38,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 19:53:38,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-15 19:53:38,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 19:53:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-15 19:53:38,202 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-15 19:53:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:38,202 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-15 19:53:38,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-15 19:53:38,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:38,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:38,203 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:38,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:38,413 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:38,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:38,413 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-15 19:53:38,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:38,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38158237] [2020-10-15 19:53:38,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:38,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38158237] [2020-10-15 19:53:38,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760180319] [2020-10-15 19:53:38,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:38,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:38,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:38,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:38,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:38,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:38,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:38,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089251537] [2020-10-15 19:53:38,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:38,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:38,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:38,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:38,677 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-15 19:53:38,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:38,744 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-15 19:53:38,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:38,744 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:38,746 INFO L225 Difference]: With dead ends: 182 [2020-10-15 19:53:38,746 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 19:53:38,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:38,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 19:53:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-15 19:53:38,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:53:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-15 19:53:38,750 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-15 19:53:38,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:38,750 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-15 19:53:38,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:38,751 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-15 19:53:38,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:38,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:38,751 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:38,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-15 19:53:38,956 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:38,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:38,956 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-15 19:53:38,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:38,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82184974] [2020-10-15 19:53:38,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:39,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82184974] [2020-10-15 19:53:39,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035091049] [2020-10-15 19:53:39,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:39,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:39,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:39,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:39,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:39,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:39,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:39,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659159339] [2020-10-15 19:53:39,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:39,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:39,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:39,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:39,220 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-15 19:53:39,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:39,392 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-15 19:53:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:53:39,393 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:39,394 INFO L225 Difference]: With dead ends: 185 [2020-10-15 19:53:39,394 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 19:53:39,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:39,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 19:53:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-15 19:53:39,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:53:39,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 19:53:39,398 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 19:53:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:39,398 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 19:53:39,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:39,399 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 19:53:39,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:39,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:39,399 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:39,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:39,600 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:39,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:39,600 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-15 19:53:39,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:39,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059502529] [2020-10-15 19:53:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:39,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059502529] [2020-10-15 19:53:39,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282061939] [2020-10-15 19:53:39,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:39,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:39,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:39,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:39,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:39,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308877501] [2020-10-15 19:53:39,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:39,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:39,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:39,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:39,863 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:40,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:40,080 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-15 19:53:40,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:53:40,081 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:40,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:40,083 INFO L225 Difference]: With dead ends: 191 [2020-10-15 19:53:40,083 INFO L226 Difference]: Without dead ends: 189 [2020-10-15 19:53:40,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-15 19:53:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-15 19:53:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:53:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-15 19:53:40,086 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-15 19:53:40,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:40,086 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-15 19:53:40,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:40,086 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-15 19:53:40,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:40,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:40,087 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:40,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:40,295 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:40,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:40,296 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-15 19:53:40,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:40,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292712138] [2020-10-15 19:53:40,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:40,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292712138] [2020-10-15 19:53:40,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85803037] [2020-10-15 19:53:40,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:40,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:40,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:40,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:40,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:40,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:40,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:40,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141700195] [2020-10-15 19:53:40,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:40,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:40,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:40,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:40,532 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-15 19:53:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:40,771 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-15 19:53:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:40,772 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:40,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:40,773 INFO L225 Difference]: With dead ends: 187 [2020-10-15 19:53:40,774 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 19:53:40,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:40,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 19:53:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-15 19:53:40,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:53:40,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 19:53:40,777 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 19:53:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:40,778 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 19:53:40,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 19:53:40,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:40,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:40,779 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:40,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-15 19:53:40,988 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:40,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:40,988 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-15 19:53:40,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:40,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719762610] [2020-10-15 19:53:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:41,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719762610] [2020-10-15 19:53:41,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712603351] [2020-10-15 19:53:41,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:41,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:41,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:41,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:41,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:41,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:41,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:41,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986306889] [2020-10-15 19:53:41,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:41,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:41,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:41,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:41,216 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:41,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:41,471 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-15 19:53:41,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:41,472 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:41,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:41,474 INFO L225 Difference]: With dead ends: 198 [2020-10-15 19:53:41,474 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 19:53:41,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:41,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 19:53:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-15 19:53:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:53:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-15 19:53:41,477 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-15 19:53:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:41,477 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-15 19:53:41,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:41,477 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-15 19:53:41,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:41,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:41,478 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:41,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:41,680 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:41,680 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-15 19:53:41,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:41,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481838151] [2020-10-15 19:53:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:41,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481838151] [2020-10-15 19:53:41,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141579952] [2020-10-15 19:53:41,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:41,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:41,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:41,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:41,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:41,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:41,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:41,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475934762] [2020-10-15 19:53:41,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:41,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:41,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:41,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:41,913 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-15 19:53:42,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:42,173 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-15 19:53:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:42,174 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:42,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:42,176 INFO L225 Difference]: With dead ends: 189 [2020-10-15 19:53:42,176 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 19:53:42,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 19:53:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-15 19:53:42,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:53:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-15 19:53:42,179 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-15 19:53:42,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:42,179 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-15 19:53:42,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:42,179 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-15 19:53:42,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:42,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:42,180 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:42,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-15 19:53:42,381 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:42,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:42,381 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-15 19:53:42,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:42,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2269770] [2020-10-15 19:53:42,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:42,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2269770] [2020-10-15 19:53:42,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474632419] [2020-10-15 19:53:42,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:42,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:42,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:42,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:42,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:42,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:42,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:42,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264160521] [2020-10-15 19:53:42,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:42,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:42,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:42,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:42,627 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-15 19:53:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:42,716 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-15 19:53:42,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:42,717 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:42,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:42,719 INFO L225 Difference]: With dead ends: 178 [2020-10-15 19:53:42,719 INFO L226 Difference]: Without dead ends: 176 [2020-10-15 19:53:42,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:42,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-15 19:53:42,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-15 19:53:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:53:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-15 19:53:42,722 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-15 19:53:42,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:42,722 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-15 19:53:42,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-15 19:53:42,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:42,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:42,723 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:42,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:42,923 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:42,924 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-15 19:53:42,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:42,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072755971] [2020-10-15 19:53:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:43,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072755971] [2020-10-15 19:53:43,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186046216] [2020-10-15 19:53:43,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:43,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:43,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:43,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:43,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:43,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:43,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:43,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853432251] [2020-10-15 19:53:43,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:43,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:43,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:43,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:43,184 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-15 19:53:43,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:43,372 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-15 19:53:43,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:43,372 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:43,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:43,374 INFO L225 Difference]: With dead ends: 193 [2020-10-15 19:53:43,374 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 19:53:43,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 19:53:43,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-15 19:53:43,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:53:43,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-15 19:53:43,377 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-15 19:53:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:43,377 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-15 19:53:43,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:43,378 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-15 19:53:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:43,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:43,378 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:43,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-15 19:53:43,579 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:43,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:43,579 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-15 19:53:43,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:43,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079909481] [2020-10-15 19:53:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:43,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079909481] [2020-10-15 19:53:43,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285463346] [2020-10-15 19:53:43,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:43,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:43,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:43,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:43,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:43,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94003834] [2020-10-15 19:53:43,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:43,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:43,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:43,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:43,841 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-15 19:53:44,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:44,096 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 19:53:44,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:44,096 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:44,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:44,098 INFO L225 Difference]: With dead ends: 195 [2020-10-15 19:53:44,098 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 19:53:44,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:53:44,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 19:53:44,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-15 19:53:44,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:53:44,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-15 19:53:44,101 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-15 19:53:44,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:44,101 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-15 19:53:44,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:44,102 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-15 19:53:44,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:44,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:44,102 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:44,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:44,303 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:44,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:44,303 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-15 19:53:44,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:44,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829452678] [2020-10-15 19:53:44,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:44,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829452678] [2020-10-15 19:53:44,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222881037] [2020-10-15 19:53:44,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:44,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:44,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:44,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:44,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:44,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:44,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:44,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093427236] [2020-10-15 19:53:44,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:44,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:44,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:44,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:44,561 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-15 19:53:44,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:44,665 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-15 19:53:44,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:44,666 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:44,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:44,667 INFO L225 Difference]: With dead ends: 174 [2020-10-15 19:53:44,668 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 19:53:44,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:44,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 19:53:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-15 19:53:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:53:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-15 19:53:44,671 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-15 19:53:44,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:44,671 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-15 19:53:44,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:44,671 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-15 19:53:44,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:44,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:44,672 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:44,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-15 19:53:44,872 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:44,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:44,873 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-15 19:53:44,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:44,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600008975] [2020-10-15 19:53:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:44,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600008975] [2020-10-15 19:53:44,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179473206] [2020-10-15 19:53:44,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:44,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:44,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:44,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:44,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:45,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:45,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:45,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428982836] [2020-10-15 19:53:45,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:45,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:45,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:45,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:45,104 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-15 19:53:45,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:45,328 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-15 19:53:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:45,329 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:45,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:45,330 INFO L225 Difference]: With dead ends: 189 [2020-10-15 19:53:45,330 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 19:53:45,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:53:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 19:53:45,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-15 19:53:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:53:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-15 19:53:45,333 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-15 19:53:45,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:45,333 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-15 19:53:45,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:45,334 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-15 19:53:45,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:45,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:45,334 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:45,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:45,535 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:45,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:45,535 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-15 19:53:45,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:45,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519959649] [2020-10-15 19:53:45,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:45,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519959649] [2020-10-15 19:53:45,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44349138] [2020-10-15 19:53:45,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:45,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:45,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:45,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:45,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:45,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:45,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:45,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163074265] [2020-10-15 19:53:45,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:45,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:45,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:45,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:45,775 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-15 19:53:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:45,903 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-15 19:53:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:45,904 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:45,906 INFO L225 Difference]: With dead ends: 175 [2020-10-15 19:53:45,906 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 19:53:45,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:45,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 19:53:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-15 19:53:45,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:53:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 19:53:45,908 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 19:53:45,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:45,908 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 19:53:45,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:45,908 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 19:53:45,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:45,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:45,909 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:46,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:46,110 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:46,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:46,110 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-15 19:53:46,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:46,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861574099] [2020-10-15 19:53:46,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:46,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861574099] [2020-10-15 19:53:46,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969312154] [2020-10-15 19:53:46,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:46,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:46,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:46,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:46,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:46,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:46,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:46,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:46,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914402050] [2020-10-15 19:53:46,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:46,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:46,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:46,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:46,369 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:46,697 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-15 19:53:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:46,697 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:46,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:46,699 INFO L225 Difference]: With dead ends: 195 [2020-10-15 19:53:46,699 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 19:53:46,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:53:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 19:53:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-15 19:53:46,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:53:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 19:53:46,703 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 19:53:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:46,703 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 19:53:46,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 19:53:46,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:46,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:46,704 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:46,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:46,905 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:46,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:46,905 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-15 19:53:46,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:46,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522495728] [2020-10-15 19:53:46,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:46,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522495728] [2020-10-15 19:53:46,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423864254] [2020-10-15 19:53:46,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:47,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:47,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:47,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:47,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:47,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:47,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:47,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342349951] [2020-10-15 19:53:47,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:47,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:47,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:47,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:47,146 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 19:53:47,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:47,403 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-15 19:53:47,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:53:47,403 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:47,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:47,405 INFO L225 Difference]: With dead ends: 187 [2020-10-15 19:53:47,405 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 19:53:47,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:47,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 19:53:47,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-15 19:53:47,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:53:47,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 19:53:47,408 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 19:53:47,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:47,409 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 19:53:47,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:47,409 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 19:53:47,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:47,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:47,409 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:47,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:47,617 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:47,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:47,618 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-15 19:53:47,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:47,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755201460] [2020-10-15 19:53:47,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:47,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755201460] [2020-10-15 19:53:47,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407754188] [2020-10-15 19:53:47,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:47,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:47,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:47,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:47,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:47,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:47,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850732349] [2020-10-15 19:53:47,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:47,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:47,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:47,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:47,898 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:48,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:48,325 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-15 19:53:48,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:48,326 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:48,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:48,328 INFO L225 Difference]: With dead ends: 212 [2020-10-15 19:53:48,328 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 19:53:48,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:53:48,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 19:53:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 19:53:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:53:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 19:53:48,331 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 19:53:48,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:48,331 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 19:53:48,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:48,332 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 19:53:48,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:48,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:48,332 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:48,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-15 19:53:48,537 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:48,537 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-15 19:53:48,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:48,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829711476] [2020-10-15 19:53:48,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:48,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829711476] [2020-10-15 19:53:48,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327322675] [2020-10-15 19:53:48,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:48,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:48,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:48,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:48,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:48,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:48,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:48,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:48,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395963118] [2020-10-15 19:53:48,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:48,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:48,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:48,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:48,772 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:49,085 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 19:53:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:49,086 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:49,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:49,087 INFO L225 Difference]: With dead ends: 202 [2020-10-15 19:53:49,087 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 19:53:49,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:53:49,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 19:53:49,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-15 19:53:49,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:53:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-15 19:53:49,091 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-15 19:53:49,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:49,091 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-15 19:53:49,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:49,091 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-15 19:53:49,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:49,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:49,091 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:49,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:49,292 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:49,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:49,293 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-15 19:53:49,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:49,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368183752] [2020-10-15 19:53:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:49,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368183752] [2020-10-15 19:53:49,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275217745] [2020-10-15 19:53:49,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:49,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:49,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:49,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:49,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:49,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:49,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:49,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985638729] [2020-10-15 19:53:49,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:49,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:49,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:49,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:49,558 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-15 19:53:49,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:49,825 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-15 19:53:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:49,825 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:49,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:49,826 INFO L225 Difference]: With dead ends: 198 [2020-10-15 19:53:49,827 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 19:53:49,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:49,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 19:53:49,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-15 19:53:49,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:53:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 19:53:49,830 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 19:53:49,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:49,830 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 19:53:49,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:49,831 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 19:53:49,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:49,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:49,831 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:50,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 19:53:50,040 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:50,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:50,040 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-15 19:53:50,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:50,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577382726] [2020-10-15 19:53:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:50,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577382726] [2020-10-15 19:53:50,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776810444] [2020-10-15 19:53:50,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:50,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:50,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:50,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:50,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:50,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:50,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:50,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353722756] [2020-10-15 19:53:50,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:50,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:50,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:50,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:50,304 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 19:53:50,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:50,707 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-15 19:53:50,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:53:50,708 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:50,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:50,709 INFO L225 Difference]: With dead ends: 209 [2020-10-15 19:53:50,709 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 19:53:50,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:53:50,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 19:53:50,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 19:53:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:53:50,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 19:53:50,713 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 19:53:50,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:50,713 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 19:53:50,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 19:53:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:50,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:50,714 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:50,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 19:53:50,914 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:50,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:50,915 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-15 19:53:50,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:50,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576661784] [2020-10-15 19:53:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:50,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576661784] [2020-10-15 19:53:50,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955832547] [2020-10-15 19:53:50,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:51,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:51,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:51,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:51,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:51,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:51,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:51,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:51,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065980333] [2020-10-15 19:53:51,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:51,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:51,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:51,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:51,174 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:51,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:51,712 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-15 19:53:51,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:53:51,713 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:51,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:51,714 INFO L225 Difference]: With dead ends: 217 [2020-10-15 19:53:51,714 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 19:53:51,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-15 19:53:51,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 19:53:51,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-15 19:53:51,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 19:53:51,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-15 19:53:51,719 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-15 19:53:51,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:51,719 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-15 19:53:51,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:51,719 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-15 19:53:51,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:51,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:51,720 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:51,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-15 19:53:51,926 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:51,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:51,926 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-15 19:53:51,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:51,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820574932] [2020-10-15 19:53:51,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:51,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820574932] [2020-10-15 19:53:51,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037711695] [2020-10-15 19:53:51,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:52,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:52,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:52,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:52,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:54,201 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:54,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:54,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:54,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539903612] [2020-10-15 19:53:54,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:54,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:54,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:54,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-15 19:53:54,236 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-15 19:53:58,519 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 19:54:02,744 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 19:54:05,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:05,251 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-15 19:54:05,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:54:05,252 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:05,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:05,253 INFO L225 Difference]: With dead ends: 236 [2020-10-15 19:54:05,253 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 19:54:05,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-15 19:54:05,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 19:54:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-15 19:54:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:54:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-15 19:54:05,258 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-15 19:54:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:05,258 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-15 19:54:05,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:05,258 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-15 19:54:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:05,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:05,259 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:05,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 19:54:05,467 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:05,467 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-15 19:54:05,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:05,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331752191] [2020-10-15 19:54:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:05,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331752191] [2020-10-15 19:54:05,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941800549] [2020-10-15 19:54:05,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:05,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:05,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:05,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:54:05,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:54:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:05,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:05,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:05,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311825197] [2020-10-15 19:54:05,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:05,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:05,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:05,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:05,748 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-10-15 19:54:06,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:06,309 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-10-15 19:54:06,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:54:06,310 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:06,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:06,311 INFO L225 Difference]: With dead ends: 219 [2020-10-15 19:54:06,311 INFO L226 Difference]: Without dead ends: 214 [2020-10-15 19:54:06,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:54:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-15 19:54:06,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-10-15 19:54:06,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:54:06,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-15 19:54:06,315 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-15 19:54:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:06,315 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-15 19:54:06,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:06,316 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-15 19:54:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:06,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:06,316 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:06,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:06,519 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:06,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:06,519 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-15 19:54:06,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:06,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563542494] [2020-10-15 19:54:06,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:06,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563542494] [2020-10-15 19:54:06,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613841346] [2020-10-15 19:54:06,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:06,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:54:06,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:06,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:06,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:06,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:06,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248484694] [2020-10-15 19:54:06,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:06,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:06,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:06,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:06,781 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-15 19:54:07,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:07,052 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-15 19:54:07,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:54:07,053 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:07,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:07,054 INFO L225 Difference]: With dead ends: 197 [2020-10-15 19:54:07,054 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 19:54:07,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:54:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 19:54:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-15 19:54:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:54:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-15 19:54:07,058 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-15 19:54:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:07,058 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-15 19:54:07,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:07,058 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-15 19:54:07,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:07,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:07,059 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:07,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:07,263 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:07,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:07,263 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-15 19:54:07,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:07,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255069506] [2020-10-15 19:54:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:07,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255069506] [2020-10-15 19:54:07,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249938399] [2020-10-15 19:54:07,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:07,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:54:07,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:07,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:07,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:07,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:07,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:07,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369774851] [2020-10-15 19:54:07,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:07,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:07,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:07,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:07,498 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-15 19:54:07,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:07,771 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-15 19:54:07,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:54:07,772 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:07,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:07,773 INFO L225 Difference]: With dead ends: 202 [2020-10-15 19:54:07,773 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 19:54:07,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:54:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 19:54:07,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-15 19:54:07,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:54:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-15 19:54:07,776 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-15 19:54:07,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:07,777 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-15 19:54:07,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:07,777 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-15 19:54:07,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:07,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:07,777 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:07,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-15 19:54:07,978 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:07,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:07,979 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-15 19:54:07,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:07,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381007380] [2020-10-15 19:54:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:08,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381007380] [2020-10-15 19:54:08,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677375294] [2020-10-15 19:54:08,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:08,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:54:08,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:08,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:08,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:08,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:08,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:08,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083255049] [2020-10-15 19:54:08,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:08,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:08,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:08,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:08,238 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-15 19:54:08,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:08,530 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-15 19:54:08,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:54:08,531 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:08,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:08,532 INFO L225 Difference]: With dead ends: 197 [2020-10-15 19:54:08,532 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 19:54:08,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:54:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 19:54:08,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-15 19:54:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:54:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-15 19:54:08,536 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-15 19:54:08,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:08,536 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-15 19:54:08,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:08,536 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-15 19:54:08,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:08,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:08,537 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:08,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 19:54:08,740 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:08,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:08,740 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-15 19:54:08,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:08,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880642591] [2020-10-15 19:54:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:08,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880642591] [2020-10-15 19:54:08,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722285894] [2020-10-15 19:54:08,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:08,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:54:08,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:08,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:08,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:09,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:09,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:09,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977845425] [2020-10-15 19:54:09,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:09,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:09,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:09,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:09,040 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-15 19:54:09,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:09,618 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-15 19:54:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 19:54:09,619 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:09,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:09,620 INFO L225 Difference]: With dead ends: 214 [2020-10-15 19:54:09,620 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 19:54:09,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:54:09,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 19:54:09,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-15 19:54:09,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:54:09,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-15 19:54:09,626 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-15 19:54:09,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:09,627 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-15 19:54:09,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:09,627 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-15 19:54:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:09,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:09,628 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:09,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 19:54:09,840 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:09,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:09,841 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-15 19:54:09,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:09,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556855874] [2020-10-15 19:54:09,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:09,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556855874] [2020-10-15 19:54:09,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706882233] [2020-10-15 19:54:09,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:10,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:54:10,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:10,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:10,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:10,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:10,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:10,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061835679] [2020-10-15 19:54:10,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:10,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:10,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:10,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:10,180 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-15 19:54:10,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:10,563 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-15 19:54:10,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:54:10,564 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:10,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:10,565 INFO L225 Difference]: With dead ends: 217 [2020-10-15 19:54:10,565 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 19:54:10,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:54:10,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 19:54:10,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-15 19:54:10,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:54:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 19:54:10,568 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 19:54:10,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:10,568 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 19:54:10,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:10,569 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 19:54:10,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:10,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:10,569 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:10,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:10,777 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:10,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:10,778 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-15 19:54:10,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:10,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34574641] [2020-10-15 19:54:10,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:10,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34574641] [2020-10-15 19:54:10,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514832648] [2020-10-15 19:54:10,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:10,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:10,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:11,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:11,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:11,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604792303] [2020-10-15 19:54:11,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:11,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:11,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:11,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:11,024 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 19:54:11,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:11,438 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-15 19:54:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:54:11,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:11,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:11,440 INFO L225 Difference]: With dead ends: 211 [2020-10-15 19:54:11,440 INFO L226 Difference]: Without dead ends: 209 [2020-10-15 19:54:11,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:54:11,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-15 19:54:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-15 19:54:11,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 19:54:11,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 19:54:11,443 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 19:54:11,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:11,444 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 19:54:11,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:11,444 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 19:54:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:11,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:11,444 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:11,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:11,645 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:11,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:11,646 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-15 19:54:11,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:11,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814016834] [2020-10-15 19:54:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:11,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814016834] [2020-10-15 19:54:11,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510678110] [2020-10-15 19:54:11,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:11,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:54:11,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:11,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:11,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:11,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:54:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:11,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:11,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:11,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620278792] [2020-10-15 19:54:11,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:11,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:11,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:11,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:11,871 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 19:54:12,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:12,356 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-15 19:54:12,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:54:12,356 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:12,357 INFO L225 Difference]: With dead ends: 211 [2020-10-15 19:54:12,357 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 19:54:12,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:54:12,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 19:54:12,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-15 19:54:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 19:54:12,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 19:54:12,361 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 19:54:12,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:12,361 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 19:54:12,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:12,361 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 19:54:12,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:12,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:12,361 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:12,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 19:54:12,562 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:12,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:12,563 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-15 19:54:12,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:12,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990542886] [2020-10-15 19:54:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:12,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990542886] [2020-10-15 19:54:12,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675455396] [2020-10-15 19:54:12,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:12,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:54:12,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:12,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:12,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:12,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:54:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:12,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:12,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:12,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029389970] [2020-10-15 19:54:12,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:12,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:12,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:12,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:12,823 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 19:54:13,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:13,397 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-15 19:54:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:54:13,398 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:13,398 INFO L225 Difference]: With dead ends: 227 [2020-10-15 19:54:13,399 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 19:54:13,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 19:54:13,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 19:54:13,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-15 19:54:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:54:13,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 19:54:13,402 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 19:54:13,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:13,402 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 19:54:13,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:13,402 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 19:54:13,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:13,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:13,403 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:13,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-15 19:54:13,604 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:13,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:13,604 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-15 19:54:13,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:13,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769315679] [2020-10-15 19:54:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:13,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769315679] [2020-10-15 19:54:13,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234314768] [2020-10-15 19:54:13,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:13,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:54:13,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:13,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:13,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:13,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:13,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:13,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56332607] [2020-10-15 19:54:13,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:13,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:13,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:13,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:13,854 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 19:54:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:14,328 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-15 19:54:14,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 19:54:14,328 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:14,329 INFO L225 Difference]: With dead ends: 221 [2020-10-15 19:54:14,329 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 19:54:14,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-15 19:54:14,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 19:54:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-15 19:54:14,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 19:54:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 19:54:14,333 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 19:54:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:14,333 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 19:54:14,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 19:54:14,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:14,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:14,334 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:14,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:14,534 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:14,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:14,535 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-15 19:54:14,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:14,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213912296] [2020-10-15 19:54:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:14,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213912296] [2020-10-15 19:54:14,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828009679] [2020-10-15 19:54:14,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:14,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:54:14,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:14,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:14,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:14,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:54:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:14,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:14,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:14,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486084904] [2020-10-15 19:54:14,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:14,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:14,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:14,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:14,770 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 19:54:15,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:15,382 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-15 19:54:15,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:54:15,382 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:15,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:15,383 INFO L225 Difference]: With dead ends: 240 [2020-10-15 19:54:15,383 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 19:54:15,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:54:15,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 19:54:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-15 19:54:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 19:54:15,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-15 19:54:15,386 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-15 19:54:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:15,386 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-15 19:54:15,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-15 19:54:15,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:15,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:15,387 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:15,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 19:54:15,587 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:15,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:15,588 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-15 19:54:15,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:15,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165064751] [2020-10-15 19:54:15,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:15,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165064751] [2020-10-15 19:54:15,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630245939] [2020-10-15 19:54:15,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:15,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:54:15,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:15,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:15,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:15,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:54:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:15,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:15,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:15,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118810463] [2020-10-15 19:54:15,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:15,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:15,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:15,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:15,853 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-15 19:54:16,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:16,533 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-15 19:54:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:54:16,536 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:16,536 INFO L225 Difference]: With dead ends: 238 [2020-10-15 19:54:16,536 INFO L226 Difference]: Without dead ends: 230 [2020-10-15 19:54:16,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:54:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-15 19:54:16,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-15 19:54:16,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:54:16,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 19:54:16,540 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 19:54:16,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:16,540 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 19:54:16,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:16,541 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 19:54:16,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:16,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:16,541 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:16,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:16,751 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:16,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:16,751 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-15 19:54:16,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:16,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086407651] [2020-10-15 19:54:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:16,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:16,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086407651] [2020-10-15 19:54:16,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279951505] [2020-10-15 19:54:16,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:16,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:16,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:17,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:17,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:17,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262084668] [2020-10-15 19:54:17,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:17,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:17,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:17,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:17,002 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 19:54:17,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:17,267 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-15 19:54:17,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:54:17,268 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:17,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:17,269 INFO L225 Difference]: With dead ends: 195 [2020-10-15 19:54:17,269 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 19:54:17,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:54:17,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 19:54:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-15 19:54:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:54:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 19:54:17,272 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 19:54:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:17,272 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 19:54:17,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 19:54:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:17,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:17,272 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:17,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-15 19:54:17,473 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:17,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:17,474 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-15 19:54:17,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:17,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988151479] [2020-10-15 19:54:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:17,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988151479] [2020-10-15 19:54:17,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788439654] [2020-10-15 19:54:17,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:17,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:54:17,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:17,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:17,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:17,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:17,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:17,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683174442] [2020-10-15 19:54:17,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:17,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:17,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:17,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:17,784 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 19:54:18,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:18,269 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-15 19:54:18,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:54:18,269 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:18,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:18,270 INFO L225 Difference]: With dead ends: 206 [2020-10-15 19:54:18,270 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 19:54:18,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:54:18,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 19:54:18,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-15 19:54:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:54:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-15 19:54:18,273 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-15 19:54:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:18,274 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-15 19:54:18,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-15 19:54:18,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:18,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:18,274 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:18,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:18,475 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:18,475 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-15 19:54:18,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:18,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242865517] [2020-10-15 19:54:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:18,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242865517] [2020-10-15 19:54:18,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16656502] [2020-10-15 19:54:18,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:18,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:54:18,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:18,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:18,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:18,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:54:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:19,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:19,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 19:54:19,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825715387] [2020-10-15 19:54:19,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 19:54:19,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:19,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 19:54:19,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-15 19:54:19,843 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-15 19:54:21,530 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-15 19:54:44,313 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-15 19:55:11,640 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-15 19:55:35,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:35,031 INFO L93 Difference]: Finished difference Result 252 states and 593 transitions. [2020-10-15 19:55:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 19:55:35,031 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-15 19:55:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:35,032 INFO L225 Difference]: With dead ends: 252 [2020-10-15 19:55:35,032 INFO L226 Difference]: Without dead ends: 247 [2020-10-15 19:55:35,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-15 19:55:35,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-15 19:55:35,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2020-10-15 19:55:35,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:55:35,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-15 19:55:35,037 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-15 19:55:35,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:35,037 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-15 19:55:35,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 19:55:35,037 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-15 19:55:35,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:35,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:35,038 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:35,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-15 19:55:35,248 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:35,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:35,248 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-15 19:55:35,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:35,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032475619] [2020-10-15 19:55:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:35,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032475619] [2020-10-15 19:55:35,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247296705] [2020-10-15 19:55:35,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:35,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:55:35,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:35,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:35,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:35,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:35,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:35,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043693258] [2020-10-15 19:55:35,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:35,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:35,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:35,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:35,511 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-15 19:55:35,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:35,731 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 19:55:35,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:55:35,732 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:35,732 INFO L225 Difference]: With dead ends: 194 [2020-10-15 19:55:35,732 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 19:55:35,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:55:35,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 19:55:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-15 19:55:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:55:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-15 19:55:35,735 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-15 19:55:35,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:35,735 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-15 19:55:35,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-15 19:55:35,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:35,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:35,735 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:35,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:35,936 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:35,937 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-15 19:55:35,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:35,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304751580] [2020-10-15 19:55:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:36,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304751580] [2020-10-15 19:55:36,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42310471] [2020-10-15 19:55:36,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:36,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:55:36,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:36,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:36,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:36,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:36,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:36,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450539132] [2020-10-15 19:55:36,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:36,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:36,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:36,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:36,205 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-15 19:55:36,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:36,519 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-15 19:55:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:55:36,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:36,521 INFO L225 Difference]: With dead ends: 205 [2020-10-15 19:55:36,521 INFO L226 Difference]: Without dead ends: 203 [2020-10-15 19:55:36,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:55:36,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-15 19:55:36,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-15 19:55:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:55:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-15 19:55:36,524 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-15 19:55:36,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:36,524 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-15 19:55:36,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-15 19:55:36,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:36,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:36,525 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:36,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:36,726 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:36,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:36,726 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-15 19:55:36,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:36,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038415099] [2020-10-15 19:55:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:36,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038415099] [2020-10-15 19:55:36,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539699770] [2020-10-15 19:55:36,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:36,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:55:36,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:36,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:36,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:36,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:36,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:36,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711064896] [2020-10-15 19:55:36,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:36,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:36,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:36,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:36,989 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-15 19:55:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:37,272 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 19:55:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:55:37,272 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:37,273 INFO L225 Difference]: With dead ends: 201 [2020-10-15 19:55:37,273 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 19:55:37,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:55:37,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 19:55:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-15 19:55:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 19:55:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-15 19:55:37,276 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-15 19:55:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:37,277 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-15 19:55:37,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:37,277 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-15 19:55:37,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:37,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:37,277 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:37,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:37,478 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:37,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:37,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-15 19:55:37,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:37,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052389893] [2020-10-15 19:55:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:37,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052389893] [2020-10-15 19:55:37,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579179786] [2020-10-15 19:55:37,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:37,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:37,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:37,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:37,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:37,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130869695] [2020-10-15 19:55:37,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:37,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:37,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:37,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:37,743 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-15 19:55:38,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:38,003 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 19:55:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:55:38,004 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:38,004 INFO L225 Difference]: With dead ends: 194 [2020-10-15 19:55:38,004 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 19:55:38,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:55:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 19:55:38,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-15 19:55:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:55:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-15 19:55:38,007 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-15 19:55:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:38,007 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-15 19:55:38,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-15 19:55:38,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:38,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:38,008 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:38,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 19:55:38,208 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:38,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:38,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-15 19:55:38,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:38,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201325819] [2020-10-15 19:55:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:38,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201325819] [2020-10-15 19:55:38,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323268041] [2020-10-15 19:55:38,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:38,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:38,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:38,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:38,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:38,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:38,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:38,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432453165] [2020-10-15 19:55:38,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:38,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:38,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:38,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:38,475 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-15 19:55:38,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:38,829 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-15 19:55:38,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:55:38,829 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:38,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:38,830 INFO L225 Difference]: With dead ends: 209 [2020-10-15 19:55:38,830 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 19:55:38,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:55:38,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 19:55:38,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-15 19:55:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:55:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-15 19:55:38,834 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-15 19:55:38,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:38,834 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-15 19:55:38,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:38,834 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-15 19:55:38,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:38,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:38,835 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:39,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:39,043 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:39,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:39,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-15 19:55:39,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:39,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421081794] [2020-10-15 19:55:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:39,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421081794] [2020-10-15 19:55:39,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276236845] [2020-10-15 19:55:39,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:39,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:55:39,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:39,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:39,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:39,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:39,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:39,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885728287] [2020-10-15 19:55:39,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:39,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:39,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:39,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:39,325 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-15 19:55:39,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:39,660 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-15 19:55:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:55:39,660 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:39,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:39,661 INFO L225 Difference]: With dead ends: 202 [2020-10-15 19:55:39,661 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 19:55:39,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:55:39,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 19:55:39,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-15 19:55:39,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:55:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 19:55:39,664 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 19:55:39,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:39,664 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 19:55:39,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:39,664 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 19:55:39,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:39,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:39,665 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:39,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 19:55:39,865 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:39,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:39,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-15 19:55:39,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:39,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2429602] [2020-10-15 19:55:39,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:39,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2429602] [2020-10-15 19:55:39,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780540720] [2020-10-15 19:55:39,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:39,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:55:39,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:39,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:39,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:40,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:40,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:40,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928563358] [2020-10-15 19:55:40,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:40,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:40,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:40,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:40,139 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-15 19:55:40,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:40,463 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 19:55:40,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:55:40,464 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:40,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:40,465 INFO L225 Difference]: With dead ends: 201 [2020-10-15 19:55:40,465 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 19:55:40,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:55:40,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 19:55:40,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-15 19:55:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:55:40,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-15 19:55:40,469 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-15 19:55:40,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:40,469 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-15 19:55:40,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:40,469 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-15 19:55:40,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:40,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:40,470 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:40,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 19:55:40,670 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:40,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:40,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-15 19:55:40,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:40,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068557846] [2020-10-15 19:55:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:40,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068557846] [2020-10-15 19:55:40,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026024012] [2020-10-15 19:55:40,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:40,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:55:40,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:40,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:40,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:40,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:40,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:40,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88834331] [2020-10-15 19:55:40,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:40,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:40,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:40,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:40,930 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-15 19:55:41,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:41,382 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-15 19:55:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 19:55:41,382 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:41,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:41,383 INFO L225 Difference]: With dead ends: 215 [2020-10-15 19:55:41,383 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 19:55:41,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:55:41,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 19:55:41,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-15 19:55:41,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:55:41,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 19:55:41,387 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 19:55:41,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:41,387 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 19:55:41,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:41,388 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 19:55:41,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:41,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:41,388 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:41,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:41,595 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:41,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:41,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-15 19:55:41,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:41,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989871434] [2020-10-15 19:55:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:41,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:41,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989871434] [2020-10-15 19:55:41,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172969354] [2020-10-15 19:55:41,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:41,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:55:41,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:41,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:41,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:41,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:41,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:41,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009555238] [2020-10-15 19:55:41,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:41,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:41,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:41,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:41,853 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 19:55:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:42,249 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-15 19:55:42,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:55:42,250 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:42,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:42,252 INFO L225 Difference]: With dead ends: 196 [2020-10-15 19:55:42,252 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 19:55:42,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:55:42,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 19:55:42,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-15 19:55:42,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:55:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 19:55:42,256 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 19:55:42,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:42,257 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 19:55:42,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:42,257 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 19:55:42,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:42,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:42,257 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:42,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:42,460 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:42,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:42,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-15 19:55:42,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:42,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854448295] [2020-10-15 19:55:42,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:42,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854448295] [2020-10-15 19:55:42,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616206516] [2020-10-15 19:55:42,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:42,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:42,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:42,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:55:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:42,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:42,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:42,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794669186] [2020-10-15 19:55:42,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:42,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:42,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:42,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:42,698 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 19:55:43,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:43,108 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-15 19:55:43,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:55:43,109 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:43,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:43,110 INFO L225 Difference]: With dead ends: 191 [2020-10-15 19:55:43,110 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 19:55:43,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:55:43,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 19:55:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-15 19:55:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:55:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 19:55:43,115 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 19:55:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:43,115 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 19:55:43,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 19:55:43,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:43,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:43,116 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:43,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 19:55:43,316 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:43,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:43,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-15 19:55:43,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:43,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611234642] [2020-10-15 19:55:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:43,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611234642] [2020-10-15 19:55:43,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424577902] [2020-10-15 19:55:43,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:43,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:43,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:43,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:43,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:43,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:55:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:43,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:43,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:43,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265811927] [2020-10-15 19:55:43,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:43,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:43,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:43,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:43,631 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 19:55:44,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:44,215 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-15 19:55:44,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:55:44,216 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:44,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:44,217 INFO L225 Difference]: With dead ends: 232 [2020-10-15 19:55:44,217 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 19:55:44,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-15 19:55:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 19:55:44,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-15 19:55:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:55:44,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 19:55:44,221 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 19:55:44,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:44,222 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 19:55:44,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:44,222 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 19:55:44,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:44,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:44,222 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:44,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:44,430 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:44,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:44,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-15 19:55:44,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:44,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45524904] [2020-10-15 19:55:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:44,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45524904] [2020-10-15 19:55:44,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986811743] [2020-10-15 19:55:44,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:44,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:55:44,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:44,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:44,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:44,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:44,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:44,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651425951] [2020-10-15 19:55:44,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:44,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:44,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:44,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:44,811 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 19:55:45,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:45,365 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-15 19:55:45,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 19:55:45,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:45,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:45,367 INFO L225 Difference]: With dead ends: 222 [2020-10-15 19:55:45,367 INFO L226 Difference]: Without dead ends: 220 [2020-10-15 19:55:45,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-15 19:55:45,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-15 19:55:45,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-15 19:55:45,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:55:45,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 19:55:45,370 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 19:55:45,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:45,370 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 19:55:45,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:45,370 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 19:55:45,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:45,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:45,371 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:45,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:45,571 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:45,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:45,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-15 19:55:45,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:45,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722683418] [2020-10-15 19:55:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:45,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722683418] [2020-10-15 19:55:45,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226166028] [2020-10-15 19:55:45,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:45,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:55:45,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:45,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:45,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:45,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:55:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:45,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:45,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:45,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360436778] [2020-10-15 19:55:45,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:45,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:45,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:45,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:45,855 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 19:55:46,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:46,656 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-15 19:55:46,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:55:46,663 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:46,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:46,664 INFO L225 Difference]: With dead ends: 254 [2020-10-15 19:55:46,664 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 19:55:46,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:55:46,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 19:55:46,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-15 19:55:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 19:55:46,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-15 19:55:46,668 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-15 19:55:46,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:46,668 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-15 19:55:46,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-15 19:55:46,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:46,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:46,669 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:46,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:46,877 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:46,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:46,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-15 19:55:46,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:46,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183775049] [2020-10-15 19:55:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:46,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183775049] [2020-10-15 19:55:46,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591746565] [2020-10-15 19:55:46,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:47,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:55:47,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:47,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:47,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:47,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:55:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:47,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:47,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:47,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307020546] [2020-10-15 19:55:47,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:47,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:47,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:47,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:47,154 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-15 19:55:47,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:47,933 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-15 19:55:47,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:55:47,933 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:47,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:47,934 INFO L225 Difference]: With dead ends: 246 [2020-10-15 19:55:47,934 INFO L226 Difference]: Without dead ends: 238 [2020-10-15 19:55:47,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 19:55:47,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-15 19:55:47,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-15 19:55:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:55:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-15 19:55:47,939 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-15 19:55:47,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:47,939 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-15 19:55:47,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:47,939 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-15 19:55:47,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:47,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:47,940 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:48,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-15 19:55:48,149 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:48,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-15 19:55:48,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:48,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831805574] [2020-10-15 19:55:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:48,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831805574] [2020-10-15 19:55:48,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028288715] [2020-10-15 19:55:48,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:48,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:55:48,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:48,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:48,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:48,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:48,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:48,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287497316] [2020-10-15 19:55:48,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:48,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:48,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:48,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:48,427 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-15 19:55:48,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:48,846 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-15 19:55:48,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:55:48,846 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:48,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:48,847 INFO L225 Difference]: With dead ends: 208 [2020-10-15 19:55:48,847 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 19:55:48,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:55:48,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 19:55:48,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-15 19:55:48,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 19:55:48,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-15 19:55:48,850 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-15 19:55:48,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:48,851 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-15 19:55:48,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:48,851 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-15 19:55:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:48,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:48,851 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:49,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 19:55:49,052 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:49,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:49,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-15 19:55:49,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:49,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664383553] [2020-10-15 19:55:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:49,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664383553] [2020-10-15 19:55:49,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960337173] [2020-10-15 19:55:49,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:49,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:49,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:49,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:49,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:49,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368293509] [2020-10-15 19:55:49,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:49,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:49,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:49,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:49,314 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-15 19:55:49,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:49,874 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-15 19:55:49,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:55:49,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:49,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:49,875 INFO L225 Difference]: With dead ends: 215 [2020-10-15 19:55:49,875 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 19:55:49,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-15 19:55:49,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 19:55:49,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-15 19:55:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 19:55:49,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 19:55:49,878 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 19:55:49,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:49,878 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 19:55:49,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:49,879 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 19:55:49,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:49,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:49,879 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:50,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-15 19:55:50,081 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:50,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:50,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-15 19:55:50,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:50,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516540786] [2020-10-15 19:55:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:50,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516540786] [2020-10-15 19:55:50,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209587943] [2020-10-15 19:55:50,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:50,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:50,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:50,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:50,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:55:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:50,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:50,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:50,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360649541] [2020-10-15 19:55:50,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:50,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:50,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:50,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:50,335 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 19:55:50,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:50,933 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-15 19:55:50,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:55:50,934 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:50,935 INFO L225 Difference]: With dead ends: 236 [2020-10-15 19:55:50,935 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 19:55:50,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:55:50,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 19:55:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-15 19:55:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 19:55:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 19:55:50,938 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 19:55:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:50,938 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 19:55:50,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:50,939 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 19:55:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:50,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:50,939 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:51,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 19:55:51,140 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:51,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:51,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-15 19:55:51,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:51,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273463018] [2020-10-15 19:55:51,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:51,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273463018] [2020-10-15 19:55:51,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772313062] [2020-10-15 19:55:51,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:51,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:55:51,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:51,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:51,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:51,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:55:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:51,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:51,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:51,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832477457] [2020-10-15 19:55:51,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:51,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:51,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:51,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:51,387 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 19:55:52,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:52,040 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-15 19:55:52,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:55:52,041 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:52,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:52,042 INFO L225 Difference]: With dead ends: 241 [2020-10-15 19:55:52,042 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:55:52,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:55:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:55:52,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-15 19:55:52,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-15 19:55:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-15 19:55:52,046 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-15 19:55:52,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:52,046 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-15 19:55:52,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:52,046 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-15 19:55:52,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:52,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:52,047 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:52,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 19:55:52,257 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:52,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-15 19:55:52,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:52,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498013959] [2020-10-15 19:55:52,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:52,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498013959] [2020-10-15 19:55:52,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890470856] [2020-10-15 19:55:52,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:52,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:55:52,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:52,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:52,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:52,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:55:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:52,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:52,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:52,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772964193] [2020-10-15 19:55:52,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:52,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:52,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:52,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:52,509 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-15 19:55:53,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:53,124 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-15 19:55:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:55:53,125 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:53,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:53,125 INFO L225 Difference]: With dead ends: 232 [2020-10-15 19:55:53,126 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 19:55:53,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 19:55:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 19:55:53,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-15 19:55:53,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 19:55:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-15 19:55:53,129 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-15 19:55:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:53,129 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-15 19:55:53,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:53,129 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-15 19:55:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:53,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:53,130 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:53,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:53,338 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:53,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:53,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-15 19:55:53,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:53,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992338158] [2020-10-15 19:55:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:53,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992338158] [2020-10-15 19:55:53,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095854785] [2020-10-15 19:55:53,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:53,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 19:55:53,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:53,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:53,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:53,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:55:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:53,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:53,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 19:55:53,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610508872] [2020-10-15 19:55:53,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 19:55:53,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:53,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 19:55:53,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:55:53,706 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-15 19:55:54,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:54,025 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-15 19:55:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:55:54,026 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-15 19:55:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:54,027 INFO L225 Difference]: With dead ends: 185 [2020-10-15 19:55:54,027 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 19:55:54,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:55:54,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 19:55:54,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-15 19:55:54,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:55:54,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 19:55:54,032 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 19:55:54,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:54,033 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 19:55:54,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 19:55:54,033 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 19:55:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:54,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:54,034 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:54,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-15 19:55:54,247 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:54,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:54,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-15 19:55:54,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:54,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044464377] [2020-10-15 19:55:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:54,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044464377] [2020-10-15 19:55:54,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019512535] [2020-10-15 19:55:54,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:54,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 19:55:54,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:54,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:54,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:54,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:54,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:54,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347170126] [2020-10-15 19:55:54,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:54,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:54,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:54,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:54,688 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-15 19:55:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:54,762 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-10-15 19:55:54,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:55:54,763 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:55:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:54,763 INFO L225 Difference]: With dead ends: 180 [2020-10-15 19:55:54,763 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 19:55:54,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:54,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 19:55:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-10-15 19:55:54,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 19:55:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-15 19:55:54,767 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-15 19:55:54,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:54,767 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-15 19:55:54,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:54,767 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-15 19:55:54,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:54,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:54,768 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:54,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 19:55:54,976 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:54,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:54,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-15 19:55:54,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:54,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811141540] [2020-10-15 19:55:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:55,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811141540] [2020-10-15 19:55:55,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614696505] [2020-10-15 19:55:55,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:55,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:55:55,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:55,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:55,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:55,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:55,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:55,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460028774] [2020-10-15 19:55:55,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:55,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:55,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:55,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:55,373 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-15 19:55:55,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:55,459 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-10-15 19:55:55,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:55:55,460 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:55:55,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:55,460 INFO L225 Difference]: With dead ends: 197 [2020-10-15 19:55:55,461 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 19:55:55,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:55:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 19:55:55,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-10-15 19:55:55,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 19:55:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-15 19:55:55,464 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-15 19:55:55,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:55,464 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-15 19:55:55,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:55,464 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-15 19:55:55,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:55,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:55,464 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:55,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:55,665 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:55,666 INFO L82 PathProgramCache]: Analyzing trace with hash 551260342, now seen corresponding path program 23 times [2020-10-15 19:55:55,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:55,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227028125] [2020-10-15 19:55:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:55,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227028125] [2020-10-15 19:55:55,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147870279] [2020-10-15 19:55:55,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:55,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 19:55:55,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:55,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:55,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:56,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:56,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:56,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132232960] [2020-10-15 19:55:56,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:56,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:56,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:56,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:56,017 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-15 19:55:56,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:56,124 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-10-15 19:55:56,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:55:56,125 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:55:56,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:56,126 INFO L225 Difference]: With dead ends: 196 [2020-10-15 19:55:56,126 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 19:55:56,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:55:56,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 19:55:56,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-10-15 19:55:56,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-15 19:55:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-15 19:55:56,130 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-15 19:55:56,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:56,130 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-15 19:55:56,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:56,130 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-15 19:55:56,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:56,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:56,131 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:56,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:56,331 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:56,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:56,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1216195462, now seen corresponding path program 24 times [2020-10-15 19:55:56,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:56,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942957977] [2020-10-15 19:55:56,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:56,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942957977] [2020-10-15 19:55:56,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378866947] [2020-10-15 19:55:56,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:56,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 19:55:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:56,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:56,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:56,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:56,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:56,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136952550] [2020-10-15 19:55:56,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:56,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:56,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:56,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:56,694 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-15 19:55:56,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:56,835 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 19:55:56,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:55:56,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:55:56,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:56,837 INFO L225 Difference]: With dead ends: 195 [2020-10-15 19:55:56,837 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 19:55:56,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:55:56,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 19:55:56,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-10-15 19:55:56,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-15 19:55:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-15 19:55:56,840 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-15 19:55:56,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:56,840 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-15 19:55:56,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:56,840 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-15 19:55:56,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:56,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:56,840 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:57,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:57,041 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:57,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1237644982, now seen corresponding path program 25 times [2020-10-15 19:55:57,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:57,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54439784] [2020-10-15 19:55:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:57,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54439784] [2020-10-15 19:55:57,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297667059] [2020-10-15 19:55:57,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:57,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:57,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:57,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:57,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:57,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661142915] [2020-10-15 19:55:57,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:57,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:57,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:57,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:57,368 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-15 19:55:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:57,551 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-10-15 19:55:57,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:55:57,552 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:55:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:57,553 INFO L225 Difference]: With dead ends: 194 [2020-10-15 19:55:57,553 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 19:55:57,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:55:57,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 19:55:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-10-15 19:55:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-15 19:55:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-15 19:55:57,558 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-15 19:55:57,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:57,558 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-15 19:55:57,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-15 19:55:57,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:57,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:57,559 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:57,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:57,768 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:57,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1238336902, now seen corresponding path program 26 times [2020-10-15 19:55:57,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:57,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687023899] [2020-10-15 19:55:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:57,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687023899] [2020-10-15 19:55:57,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521230625] [2020-10-15 19:55:57,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:57,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:57,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:57,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:57,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:58,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:58,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:58,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112077027] [2020-10-15 19:55:58,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:58,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:58,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:58,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:58,101 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-15 19:55:58,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:58,306 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-10-15 19:55:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:55:58,306 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:55:58,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:58,307 INFO L225 Difference]: With dead ends: 193 [2020-10-15 19:55:58,307 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 19:55:58,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:55:58,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 19:55:58,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-10-15 19:55:58,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-15 19:55:58,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-15 19:55:58,310 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-15 19:55:58,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:58,310 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-15 19:55:58,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:58,310 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-15 19:55:58,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:58,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:58,310 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:58,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-15 19:55:58,511 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:58,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:58,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1238359222, now seen corresponding path program 27 times [2020-10-15 19:55:58,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:58,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608546850] [2020-10-15 19:55:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:58,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608546850] [2020-10-15 19:55:58,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680621723] [2020-10-15 19:55:58,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:58,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 19:55:58,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:58,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:58,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:58,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:55:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:58,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:58,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:58,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066300712] [2020-10-15 19:55:58,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:58,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:58,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:58,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:58,833 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-15 19:55:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:59,089 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 19:55:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:55:59,089 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:55:59,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:59,090 INFO L225 Difference]: With dead ends: 202 [2020-10-15 19:55:59,090 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 19:55:59,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:55:59,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 19:55:59,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-15 19:55:59,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-15 19:55:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-15 19:55:59,095 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-15 19:55:59,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:59,095 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-15 19:55:59,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:59,095 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-15 19:55:59,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:55:59,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:59,096 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:59,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 19:55:59,306 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:59,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:59,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-15 19:55:59,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:59,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845867049] [2020-10-15 19:55:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:59,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845867049] [2020-10-15 19:55:59,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089913062] [2020-10-15 19:55:59,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:59,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:55:59,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:59,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:59,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:59,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:59,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:59,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946140963] [2020-10-15 19:55:59,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:59,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:59,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:59,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:59,674 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-15 19:55:59,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:59,733 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-15 19:55:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:55:59,734 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:55:59,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:59,734 INFO L225 Difference]: With dead ends: 188 [2020-10-15 19:55:59,735 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 19:55:59,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:59,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 19:55:59,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-15 19:55:59,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 19:55:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-15 19:55:59,738 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-15 19:55:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:59,738 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-15 19:55:59,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-15 19:55:59,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:55:59,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:59,739 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:59,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 19:55:59,939 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:59,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:59,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-15 19:55:59,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:59,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369825748] [2020-10-15 19:55:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:00,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369825748] [2020-10-15 19:56:00,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274365740] [2020-10-15 19:56:00,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:00,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:00,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:00,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:00,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:00,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:00,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:00,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161829560] [2020-10-15 19:56:00,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:00,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:00,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:00,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:00,283 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-15 19:56:00,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:00,518 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-15 19:56:00,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:56:00,519 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:00,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:00,520 INFO L225 Difference]: With dead ends: 199 [2020-10-15 19:56:00,520 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 19:56:00,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:56:00,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 19:56:00,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-15 19:56:00,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 19:56:00,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-15 19:56:00,523 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-15 19:56:00,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:00,523 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-15 19:56:00,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:00,523 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-15 19:56:00,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:00,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:00,524 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:00,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 19:56:00,724 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:00,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:00,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-15 19:56:00,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:00,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620468481] [2020-10-15 19:56:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:00,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620468481] [2020-10-15 19:56:00,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095337009] [2020-10-15 19:56:00,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:00,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:00,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:01,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:01,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:01,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600543537] [2020-10-15 19:56:01,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:01,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:01,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:01,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:01,113 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-15 19:56:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:01,423 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-15 19:56:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:56:01,424 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:01,424 INFO L225 Difference]: With dead ends: 210 [2020-10-15 19:56:01,425 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 19:56:01,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:56:01,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 19:56:01,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-15 19:56:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-15 19:56:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-15 19:56:01,428 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-15 19:56:01,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:01,428 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-15 19:56:01,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-15 19:56:01,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:01,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:01,429 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:01,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 19:56:01,630 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:01,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:01,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-15 19:56:01,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:01,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637925093] [2020-10-15 19:56:01,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:01,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637925093] [2020-10-15 19:56:01,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387350115] [2020-10-15 19:56:01,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:01,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:01,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:01,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:01,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:04,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:04,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:04,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727119922] [2020-10-15 19:56:04,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:04,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:04,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:04,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:04,555 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-15 19:56:04,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:04,898 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-15 19:56:04,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:56:04,899 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:04,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:04,900 INFO L225 Difference]: With dead ends: 210 [2020-10-15 19:56:04,900 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 19:56:04,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:56:04,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 19:56:04,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-15 19:56:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 19:56:04,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-15 19:56:04,905 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-15 19:56:04,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:04,905 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-15 19:56:04,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:04,905 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-15 19:56:04,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:04,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:04,906 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:05,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-15 19:56:05,110 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:05,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:05,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-15 19:56:05,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:05,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282986776] [2020-10-15 19:56:05,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:05,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282986776] [2020-10-15 19:56:05,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867792161] [2020-10-15 19:56:05,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:05,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:56:05,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:05,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:05,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:09,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:09,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:09,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000907851] [2020-10-15 19:56:09,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:09,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:09,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:09,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:56:09,499 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-15 19:56:13,715 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:56:13,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:13,975 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-15 19:56:13,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:56:13,976 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:13,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:13,976 INFO L225 Difference]: With dead ends: 218 [2020-10-15 19:56:13,976 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 19:56:13,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-15 19:56:13,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 19:56:13,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-15 19:56:13,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:56:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 19:56:13,981 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 19:56:13,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:13,981 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 19:56:13,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:13,981 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 19:56:13,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:13,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:13,982 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:14,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:14,182 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:14,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:14,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-15 19:56:14,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:14,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337754129] [2020-10-15 19:56:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:14,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337754129] [2020-10-15 19:56:14,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016955890] [2020-10-15 19:56:14,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:14,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:14,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:14,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:14,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:14,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:14,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:14,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095709436] [2020-10-15 19:56:14,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:14,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:14,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:14,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:14,603 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 19:56:14,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:14,978 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-15 19:56:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:56:14,979 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:14,979 INFO L225 Difference]: With dead ends: 212 [2020-10-15 19:56:14,979 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 19:56:14,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:56:14,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 19:56:14,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-15 19:56:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-15 19:56:14,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-15 19:56:14,983 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-15 19:56:14,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:14,983 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-15 19:56:14,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:14,984 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-15 19:56:14,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:14,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:14,984 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:15,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:15,185 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:15,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-15 19:56:15,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:15,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249523909] [2020-10-15 19:56:15,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:15,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249523909] [2020-10-15 19:56:15,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018297116] [2020-10-15 19:56:15,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:15,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:56:15,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:15,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:15,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:15,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:15,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:15,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91881106] [2020-10-15 19:56:15,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:15,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:15,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:15,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:15,531 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-15 19:56:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:15,887 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-15 19:56:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:56:15,888 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:15,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:15,889 INFO L225 Difference]: With dead ends: 212 [2020-10-15 19:56:15,889 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 19:56:15,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:56:15,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 19:56:15,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-15 19:56:15,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:56:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 19:56:15,892 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 19:56:15,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:15,892 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 19:56:15,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 19:56:15,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:15,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:15,893 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:16,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:16,093 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:16,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:16,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-15 19:56:16,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:16,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412757406] [2020-10-15 19:56:16,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:16,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412757406] [2020-10-15 19:56:16,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848182729] [2020-10-15 19:56:16,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:16,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:56:16,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:16,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:16,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:16,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:16,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:16,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723717002] [2020-10-15 19:56:16,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:16,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:16,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:16,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:16,433 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 19:56:16,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:16,799 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-15 19:56:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:16,800 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:16,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:16,800 INFO L225 Difference]: With dead ends: 224 [2020-10-15 19:56:16,800 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 19:56:16,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:56:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 19:56:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-15 19:56:16,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:56:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 19:56:16,803 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 19:56:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:16,803 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 19:56:16,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 19:56:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:16,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:16,804 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:17,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:17,009 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:17,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:17,010 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-15 19:56:17,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:17,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522681315] [2020-10-15 19:56:17,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:17,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522681315] [2020-10-15 19:56:17,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733452643] [2020-10-15 19:56:17,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:17,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:17,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:17,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:17,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:17,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075530783] [2020-10-15 19:56:17,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:17,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:17,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:17,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:17,331 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 19:56:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:17,672 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-15 19:56:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:17,673 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:17,674 INFO L225 Difference]: With dead ends: 218 [2020-10-15 19:56:17,674 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 19:56:17,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 19:56:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-15 19:56:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:56:17,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 19:56:17,678 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 19:56:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:17,678 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 19:56:17,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:17,678 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 19:56:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:17,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:17,679 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:17,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:17,879 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:17,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:17,880 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-15 19:56:17,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:17,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141339698] [2020-10-15 19:56:17,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:18,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141339698] [2020-10-15 19:56:18,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475789188] [2020-10-15 19:56:18,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:18,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:18,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:18,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:18,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:18,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:18,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:18,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627875200] [2020-10-15 19:56:18,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:18,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:18,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:18,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:18,211 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 19:56:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:18,504 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-15 19:56:18,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:56:18,505 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:18,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:18,506 INFO L225 Difference]: With dead ends: 206 [2020-10-15 19:56:18,506 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 19:56:18,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:56:18,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 19:56:18,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-15 19:56:18,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-15 19:56:18,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-15 19:56:18,509 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-15 19:56:18,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:18,509 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-15 19:56:18,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:18,509 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-15 19:56:18,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:18,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:18,509 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:18,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 19:56:18,710 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:18,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:18,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-15 19:56:18,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:18,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065063029] [2020-10-15 19:56:18,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:18,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065063029] [2020-10-15 19:56:18,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275214964] [2020-10-15 19:56:18,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:18,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 19:56:18,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:18,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:18,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:19,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:19,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:19,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691692559] [2020-10-15 19:56:19,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:19,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:19,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:19,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:19,056 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-15 19:56:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:19,349 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-10-15 19:56:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:56:19,350 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:19,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:19,352 INFO L225 Difference]: With dead ends: 207 [2020-10-15 19:56:19,352 INFO L226 Difference]: Without dead ends: 205 [2020-10-15 19:56:19,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:56:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-15 19:56:19,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-10-15 19:56:19,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 19:56:19,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-15 19:56:19,356 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-15 19:56:19,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:19,356 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-15 19:56:19,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:19,356 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-15 19:56:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:19,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:19,357 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:19,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 19:56:19,565 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:19,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:19,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-15 19:56:19,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:19,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430127034] [2020-10-15 19:56:19,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:19,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430127034] [2020-10-15 19:56:19,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301782100] [2020-10-15 19:56:19,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:19,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:19,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:19,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:19,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:19,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:19,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:19,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110547155] [2020-10-15 19:56:19,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:19,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:19,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:19,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:19,942 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-15 19:56:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:20,237 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-10-15 19:56:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:56:20,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:20,239 INFO L225 Difference]: With dead ends: 217 [2020-10-15 19:56:20,239 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 19:56:20,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:56:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 19:56:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-10-15 19:56:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 19:56:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-15 19:56:20,243 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-15 19:56:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:20,243 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-15 19:56:20,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-15 19:56:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:20,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:20,244 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:20,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 19:56:20,444 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:20,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-15 19:56:20,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:20,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025308285] [2020-10-15 19:56:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:20,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025308285] [2020-10-15 19:56:20,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63287021] [2020-10-15 19:56:20,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:20,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:56:20,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:20,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:20,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:22,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:22,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:22,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684980384] [2020-10-15 19:56:22,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:22,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:22,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:22,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:22,033 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-15 19:56:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:22,443 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-10-15 19:56:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:22,443 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:22,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:22,444 INFO L225 Difference]: With dead ends: 223 [2020-10-15 19:56:22,444 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 19:56:22,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 19:56:22,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-15 19:56:22,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:56:22,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-15 19:56:22,447 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-15 19:56:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:22,447 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-15 19:56:22,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:22,447 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-15 19:56:22,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:22,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:22,448 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:22,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 19:56:22,651 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:22,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:22,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-15 19:56:22,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:22,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401436365] [2020-10-15 19:56:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:22,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401436365] [2020-10-15 19:56:22,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916222002] [2020-10-15 19:56:22,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:22,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:22,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:22,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:22,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:23,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:23,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:23,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167929249] [2020-10-15 19:56:23,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:23,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:23,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:23,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:23,016 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-15 19:56:23,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:23,338 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-10-15 19:56:23,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:23,338 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:23,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:23,339 INFO L225 Difference]: With dead ends: 225 [2020-10-15 19:56:23,339 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 19:56:23,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:23,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 19:56:23,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-10-15 19:56:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 19:56:23,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-15 19:56:23,343 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-15 19:56:23,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:23,343 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-15 19:56:23,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:23,343 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-15 19:56:23,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:23,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:23,343 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:23,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:23,544 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:23,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:23,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-15 19:56:23,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:23,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484733086] [2020-10-15 19:56:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:23,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484733086] [2020-10-15 19:56:23,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439549410] [2020-10-15 19:56:23,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:23,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:23,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:23,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:23,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:23,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373083298] [2020-10-15 19:56:23,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:23,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:23,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:23,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:23,929 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-15 19:56:24,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:24,250 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-10-15 19:56:24,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:56:24,251 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:24,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:24,252 INFO L225 Difference]: With dead ends: 214 [2020-10-15 19:56:24,252 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 19:56:24,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:56:24,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 19:56:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-10-15 19:56:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:56:24,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-15 19:56:24,256 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-15 19:56:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:24,256 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-15 19:56:24,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-15 19:56:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:24,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:24,256 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:24,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:24,457 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:24,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:24,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-15 19:56:24,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:24,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123673743] [2020-10-15 19:56:24,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:24,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123673743] [2020-10-15 19:56:24,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447437278] [2020-10-15 19:56:24,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:24,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:24,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:24,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:24,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:24,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:24,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:24,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000556965] [2020-10-15 19:56:24,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:24,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:24,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:24,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:24,856 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-15 19:56:25,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:25,083 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-10-15 19:56:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:56:25,084 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:25,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:25,084 INFO L225 Difference]: With dead ends: 203 [2020-10-15 19:56:25,085 INFO L226 Difference]: Without dead ends: 201 [2020-10-15 19:56:25,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:56:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-15 19:56:25,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-10-15 19:56:25,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 19:56:25,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-15 19:56:25,087 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-15 19:56:25,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:25,087 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-15 19:56:25,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:25,087 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-15 19:56:25,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:25,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:25,088 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:25,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-15 19:56:25,288 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:25,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:25,289 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-15 19:56:25,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:25,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201120987] [2020-10-15 19:56:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:25,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201120987] [2020-10-15 19:56:25,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691332172] [2020-10-15 19:56:25,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:25,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:56:25,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:25,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:25,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:25,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:25,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:25,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805212541] [2020-10-15 19:56:25,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:25,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:25,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:25,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:25,707 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-15 19:56:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:25,789 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-15 19:56:25,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:56:25,790 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:25,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:25,790 INFO L225 Difference]: With dead ends: 212 [2020-10-15 19:56:25,790 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 19:56:25,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:56:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 19:56:25,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-15 19:56:25,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:56:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-15 19:56:25,794 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-15 19:56:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:25,794 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-15 19:56:25,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:25,794 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-15 19:56:25,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:25,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:25,795 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:25,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:25,996 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:25,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:25,996 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-15 19:56:25,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:25,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287706599] [2020-10-15 19:56:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:26,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287706599] [2020-10-15 19:56:26,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329704003] [2020-10-15 19:56:26,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:26,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:26,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:26,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:26,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:26,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:26,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:26,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460524739] [2020-10-15 19:56:26,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:26,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:26,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:26,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:26,390 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-15 19:56:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:26,656 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-15 19:56:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:26,657 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:26,657 INFO L225 Difference]: With dead ends: 217 [2020-10-15 19:56:26,657 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 19:56:26,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:56:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 19:56:26,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-15 19:56:26,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:56:26,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-15 19:56:26,661 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-15 19:56:26,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:26,661 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-15 19:56:26,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-15 19:56:26,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:26,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:26,662 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:26,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:26,862 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:26,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:26,863 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-15 19:56:26,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:26,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996389340] [2020-10-15 19:56:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:27,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996389340] [2020-10-15 19:56:27,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192763652] [2020-10-15 19:56:27,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:27,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:56:27,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:27,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:27,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:27,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:27,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:27,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055988256] [2020-10-15 19:56:27,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:27,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:27,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:27,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:27,297 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-15 19:56:27,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:27,640 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-15 19:56:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:27,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:27,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:27,642 INFO L225 Difference]: With dead ends: 227 [2020-10-15 19:56:27,642 INFO L226 Difference]: Without dead ends: 225 [2020-10-15 19:56:27,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:56:27,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-15 19:56:27,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-15 19:56:27,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:56:27,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-15 19:56:27,646 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-15 19:56:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:27,647 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-15 19:56:27,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-15 19:56:27,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:27,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:27,647 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:27,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:27,849 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:27,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:27,850 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-15 19:56:27,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:27,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440779174] [2020-10-15 19:56:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:27,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440779174] [2020-10-15 19:56:27,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154725281] [2020-10-15 19:56:27,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:28,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:28,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:28,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:28,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:28,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:28,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:28,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242580524] [2020-10-15 19:56:28,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:28,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:28,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:28,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:28,248 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-15 19:56:28,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:28,676 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-15 19:56:28,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:56:28,677 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:28,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:28,678 INFO L225 Difference]: With dead ends: 227 [2020-10-15 19:56:28,678 INFO L226 Difference]: Without dead ends: 225 [2020-10-15 19:56:28,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:56:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-15 19:56:28,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-10-15 19:56:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:56:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-15 19:56:28,681 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-15 19:56:28,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:28,682 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-15 19:56:28,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:28,682 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-15 19:56:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:28,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:28,682 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:28,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-15 19:56:28,885 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:28,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:28,887 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-15 19:56:28,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:28,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131313424] [2020-10-15 19:56:28,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:29,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131313424] [2020-10-15 19:56:29,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865044394] [2020-10-15 19:56:29,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:29,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:29,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:32,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:32,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:32,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681451291] [2020-10-15 19:56:32,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:32,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:32,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:32,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:56:32,091 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-15 19:56:36,337 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:56:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:36,664 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-10-15 19:56:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:56:36,665 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:36,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:36,665 INFO L225 Difference]: With dead ends: 237 [2020-10-15 19:56:36,665 INFO L226 Difference]: Without dead ends: 235 [2020-10-15 19:56:36,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-15 19:56:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-15 19:56:36,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-10-15 19:56:36,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:56:36,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 19:56:36,669 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 19:56:36,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:36,669 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 19:56:36,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:36,669 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 19:56:36,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:36,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:36,669 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:36,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 19:56:36,870 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:36,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:36,871 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-15 19:56:36,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:36,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412680940] [2020-10-15 19:56:36,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:37,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412680940] [2020-10-15 19:56:37,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485801680] [2020-10-15 19:56:37,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:37,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:37,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:37,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:37,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:37,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:37,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:37,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471472378] [2020-10-15 19:56:37,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:37,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:37,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:37,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:37,272 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 19:56:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:37,727 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-10-15 19:56:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:56:37,728 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:37,729 INFO L225 Difference]: With dead ends: 229 [2020-10-15 19:56:37,729 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 19:56:37,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:56:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 19:56:37,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-15 19:56:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:56:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-10-15 19:56:37,733 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-10-15 19:56:37,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:37,733 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-10-15 19:56:37,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-10-15 19:56:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:37,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:37,734 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:37,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 19:56:37,935 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:37,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:37,935 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-15 19:56:37,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:37,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858071777] [2020-10-15 19:56:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:38,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858071777] [2020-10-15 19:56:38,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279749243] [2020-10-15 19:56:38,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:38,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:56:38,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:38,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:38,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:38,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:38,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:38,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625544613] [2020-10-15 19:56:38,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:38,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:38,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:38,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:38,284 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-10-15 19:56:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:38,732 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-10-15 19:56:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:56:38,734 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:38,734 INFO L225 Difference]: With dead ends: 225 [2020-10-15 19:56:38,734 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 19:56:38,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:56:38,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 19:56:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-10-15 19:56:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:56:38,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 19:56:38,738 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 19:56:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:38,739 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 19:56:38,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 19:56:38,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:38,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:38,739 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:38,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 19:56:38,940 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:38,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:38,940 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-10-15 19:56:38,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:38,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031833302] [2020-10-15 19:56:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:39,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031833302] [2020-10-15 19:56:39,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128230258] [2020-10-15 19:56:39,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:39,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:39,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:39,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:39,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:39,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:39,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:39,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83004278] [2020-10-15 19:56:39,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:39,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:39,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:39,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:39,312 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 19:56:40,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:40,040 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-10-15 19:56:40,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:56:40,042 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:40,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:40,043 INFO L225 Difference]: With dead ends: 239 [2020-10-15 19:56:40,043 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 19:56:40,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:56:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 19:56:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-15 19:56:40,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:56:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 19:56:40,049 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 19:56:40,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:40,049 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 19:56:40,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:40,049 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 19:56:40,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:40,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:40,050 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:40,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 19:56:40,251 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:40,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:40,251 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-10-15 19:56:40,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:40,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354488932] [2020-10-15 19:56:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:40,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354488932] [2020-10-15 19:56:40,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482265115] [2020-10-15 19:56:40,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:40,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:56:40,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:40,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:40,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:40,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:40,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:40,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204622993] [2020-10-15 19:56:40,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:40,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:40,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:40,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:40,619 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 19:56:41,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:41,006 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-10-15 19:56:41,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:56:41,007 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:41,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:41,008 INFO L225 Difference]: With dead ends: 234 [2020-10-15 19:56:41,008 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 19:56:41,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:56:41,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 19:56:41,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-10-15 19:56:41,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:56:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 19:56:41,011 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 19:56:41,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:41,012 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 19:56:41,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:41,012 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 19:56:41,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:41,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:41,015 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:41,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-15 19:56:41,225 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:41,225 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-10-15 19:56:41,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:41,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628496259] [2020-10-15 19:56:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:41,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628496259] [2020-10-15 19:56:41,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723475112] [2020-10-15 19:56:41,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:41,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:41,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:41,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:41,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:41,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:41,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:41,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897880149] [2020-10-15 19:56:41,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:41,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:41,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:41,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:41,562 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 19:56:41,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:41,884 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-10-15 19:56:41,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:56:41,885 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:41,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:41,885 INFO L225 Difference]: With dead ends: 218 [2020-10-15 19:56:41,885 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 19:56:41,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:41,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 19:56:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-10-15 19:56:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 19:56:41,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-10-15 19:56:41,888 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-10-15 19:56:41,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:41,888 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-10-15 19:56:41,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-10-15 19:56:41,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:41,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:41,889 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:42,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:42,089 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:42,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:42,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-10-15 19:56:42,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:42,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134514675] [2020-10-15 19:56:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:42,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134514675] [2020-10-15 19:56:42,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440574162] [2020-10-15 19:56:42,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:42,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:42,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:42,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:42,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:42,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048351715] [2020-10-15 19:56:42,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:42,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:42,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:42,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:42,478 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-10-15 19:56:42,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:42,655 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-10-15 19:56:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:56:42,656 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:42,656 INFO L225 Difference]: With dead ends: 208 [2020-10-15 19:56:42,657 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 19:56:42,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:56:42,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 19:56:42,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-10-15 19:56:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 19:56:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-10-15 19:56:42,661 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-10-15 19:56:42,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:42,661 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-10-15 19:56:42,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:42,661 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-10-15 19:56:42,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:42,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:42,662 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:42,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:42,863 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:42,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:42,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-10-15 19:56:42,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:42,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235767453] [2020-10-15 19:56:42,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:43,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235767453] [2020-10-15 19:56:43,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116495267] [2020-10-15 19:56:43,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:43,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:43,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:43,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:43,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:43,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:43,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:43,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572908397] [2020-10-15 19:56:43,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:43,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:43,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:43,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:43,403 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-10-15 19:56:43,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:43,752 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-10-15 19:56:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:56:43,753 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:43,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:43,754 INFO L225 Difference]: With dead ends: 229 [2020-10-15 19:56:43,754 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 19:56:43,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:56:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 19:56:43,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-10-15 19:56:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:56:43,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-15 19:56:43,757 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-15 19:56:43,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:43,757 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-15 19:56:43,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:43,757 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-15 19:56:43,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:43,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:43,758 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:43,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:43,966 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:43,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:43,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-10-15 19:56:43,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:43,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615349485] [2020-10-15 19:56:43,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:44,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615349485] [2020-10-15 19:56:44,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117759619] [2020-10-15 19:56:44,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:44,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:56:44,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:44,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:44,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:44,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:44,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:44,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050598224] [2020-10-15 19:56:44,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:44,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:44,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:44,373 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-15 19:56:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:44,772 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-10-15 19:56:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:56:44,773 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:44,774 INFO L225 Difference]: With dead ends: 235 [2020-10-15 19:56:44,774 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:56:44,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:56:44,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-10-15 19:56:44,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 19:56:44,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-10-15 19:56:44,778 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-10-15 19:56:44,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:44,778 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-10-15 19:56:44,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:44,778 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-10-15 19:56:44,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:44,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:44,778 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:44,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:44,979 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:44,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:44,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-10-15 19:56:44,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:44,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828046101] [2020-10-15 19:56:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:45,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828046101] [2020-10-15 19:56:45,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843871557] [2020-10-15 19:56:45,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:45,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:45,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:45,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:45,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:45,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:45,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:45,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832893272] [2020-10-15 19:56:45,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:45,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:45,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:45,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:45,358 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-10-15 19:56:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:45,851 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-10-15 19:56:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:56:45,851 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:45,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:45,852 INFO L225 Difference]: With dead ends: 233 [2020-10-15 19:56:45,852 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 19:56:45,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:56:45,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 19:56:45,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-10-15 19:56:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:56:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-15 19:56:45,856 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-15 19:56:45,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:45,856 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-15 19:56:45,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-15 19:56:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:45,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:45,857 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:46,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:46,065 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:46,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-10-15 19:56:46,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:46,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97666417] [2020-10-15 19:56:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:46,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97666417] [2020-10-15 19:56:46,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953723156] [2020-10-15 19:56:46,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:46,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:46,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:46,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:46,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:49,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:49,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:49,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493298051] [2020-10-15 19:56:49,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:49,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:49,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:49,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:56:49,932 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-15 19:56:54,201 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:56:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:54,558 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-10-15 19:56:54,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:56:54,559 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:54,560 INFO L225 Difference]: With dead ends: 241 [2020-10-15 19:56:54,560 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 19:56:54,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-15 19:56:54,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 19:56:54,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-15 19:56:54,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:56:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-10-15 19:56:54,564 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-10-15 19:56:54,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:54,564 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-10-15 19:56:54,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:54,564 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-10-15 19:56:54,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:54,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:54,565 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:54,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:54,765 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:54,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:54,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-10-15 19:56:54,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:54,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779889129] [2020-10-15 19:56:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:54,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779889129] [2020-10-15 19:56:54,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282546355] [2020-10-15 19:56:54,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:54,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:54,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:54,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:54,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:55,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:55,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:55,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907338329] [2020-10-15 19:56:55,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:55,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:55,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:55,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:55,189 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-10-15 19:56:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:55,702 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-10-15 19:56:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:56:55,702 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:55,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:55,703 INFO L225 Difference]: With dead ends: 233 [2020-10-15 19:56:55,703 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 19:56:55,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:56:55,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 19:56:55,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-10-15 19:56:55,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:56:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-10-15 19:56:55,705 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-10-15 19:56:55,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:55,705 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-10-15 19:56:55,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:55,705 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-10-15 19:56:55,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:55,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:55,706 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:55,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-15 19:56:55,907 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:55,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:55,907 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-10-15 19:56:55,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:55,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507532005] [2020-10-15 19:56:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:56,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507532005] [2020-10-15 19:56:56,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483679098] [2020-10-15 19:56:56,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:56,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:56,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:56,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:56,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:56,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305209291] [2020-10-15 19:56:56,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:56,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:56,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:56,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:56,283 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-10-15 19:56:56,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:56,433 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-10-15 19:56:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:56:56,434 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:56,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:56,435 INFO L225 Difference]: With dead ends: 204 [2020-10-15 19:56:56,435 INFO L226 Difference]: Without dead ends: 202 [2020-10-15 19:56:56,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:56:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-15 19:56:56,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-10-15 19:56:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:56:56,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-10-15 19:56:56,438 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-10-15 19:56:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:56,438 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-10-15 19:56:56,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-10-15 19:56:56,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:56,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:56,438 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:56,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:56,639 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:56,640 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-10-15 19:56:56,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:56,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629869893] [2020-10-15 19:56:56,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:56,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629869893] [2020-10-15 19:56:56,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195750886] [2020-10-15 19:56:56,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:56,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:56,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:56,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:56,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:56,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:56,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:56,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941939600] [2020-10-15 19:56:56,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:56,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:56,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:56,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:56,991 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-10-15 19:56:57,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:57,322 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-10-15 19:56:57,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:56:57,323 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:57,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:57,323 INFO L225 Difference]: With dead ends: 225 [2020-10-15 19:56:57,324 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 19:56:57,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:57,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 19:56:57,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-10-15 19:56:57,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:56:57,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-10-15 19:56:57,326 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-10-15 19:56:57,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:57,326 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-10-15 19:56:57,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:57,326 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-10-15 19:56:57,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:57,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:57,327 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:57,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 19:56:57,528 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:57,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:57,528 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-10-15 19:56:57,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:57,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108712998] [2020-10-15 19:56:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:57,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108712998] [2020-10-15 19:56:57,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87420113] [2020-10-15 19:56:57,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:57,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:56:57,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:57,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:57,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:59,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:59,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:59,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817511594] [2020-10-15 19:56:59,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:59,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:59,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:59,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:59,141 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-10-15 19:56:59,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:59,545 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-10-15 19:56:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:56:59,546 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:59,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:59,547 INFO L225 Difference]: With dead ends: 231 [2020-10-15 19:56:59,547 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 19:56:59,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:56:59,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 19:56:59,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-10-15 19:56:59,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 19:56:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-10-15 19:56:59,551 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-10-15 19:56:59,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:59,551 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-10-15 19:56:59,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:59,551 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-10-15 19:56:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:59,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:59,552 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:59,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:59,752 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:59,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:59,753 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-10-15 19:56:59,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:59,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363830809] [2020-10-15 19:56:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:59,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363830809] [2020-10-15 19:56:59,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005199521] [2020-10-15 19:56:59,908 INFO L93 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:59,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:59,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:59,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:59,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:00,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:00,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:00,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708678599] [2020-10-15 19:57:00,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:00,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:00,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:00,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:00,146 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-10-15 19:57:00,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:00,336 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-10-15 19:57:00,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:57:00,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:00,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:00,338 INFO L225 Difference]: With dead ends: 200 [2020-10-15 19:57:00,338 INFO L226 Difference]: Without dead ends: 198 [2020-10-15 19:57:00,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:57:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-15 19:57:00,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-10-15 19:57:00,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:00,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-10-15 19:57:00,341 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-10-15 19:57:00,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:00,341 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-10-15 19:57:00,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:00,341 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-10-15 19:57:00,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:00,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:00,342 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:00,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:00,544 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:00,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:00,545 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-10-15 19:57:00,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:00,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319354560] [2020-10-15 19:57:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:00,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319354560] [2020-10-15 19:57:00,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327037598] [2020-10-15 19:57:00,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:00,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:57:00,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:00,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:00,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:00,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:00,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:00,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426147696] [2020-10-15 19:57:00,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:00,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:00,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:00,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:00,879 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-10-15 19:57:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:01,257 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-10-15 19:57:01,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:57:01,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:01,259 INFO L225 Difference]: With dead ends: 221 [2020-10-15 19:57:01,259 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 19:57:01,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:57:01,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 19:57:01,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-10-15 19:57:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:57:01,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-10-15 19:57:01,263 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-10-15 19:57:01,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:01,263 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-10-15 19:57:01,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:01,263 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-10-15 19:57:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:01,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:01,264 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:01,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-15 19:57:01,464 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:01,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:01,465 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-10-15 19:57:01,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:01,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119011732] [2020-10-15 19:57:01,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:01,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119011732] [2020-10-15 19:57:01,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598896815] [2020-10-15 19:57:01,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:01,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:57:01,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:01,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:01,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:01,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:01,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:01,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37851581] [2020-10-15 19:57:01,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:01,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:01,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:01,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:01,799 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 17 states. [2020-10-15 19:57:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:02,024 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-10-15 19:57:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:57:02,025 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:02,026 INFO L225 Difference]: With dead ends: 201 [2020-10-15 19:57:02,026 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 19:57:02,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:57:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 19:57:02,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-10-15 19:57:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:57:02,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 19:57:02,030 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 19:57:02,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:02,030 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 19:57:02,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 19:57:02,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:02,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:02,031 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:02,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:02,231 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:02,232 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-10-15 19:57:02,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:02,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675367126] [2020-10-15 19:57:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:02,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675367126] [2020-10-15 19:57:02,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481938511] [2020-10-15 19:57:02,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:02,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:02,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:02,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:57:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:02,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:02,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:02,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527627099] [2020-10-15 19:57:02,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:02,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:02,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:02,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:02,610 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 19:57:03,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:03,160 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-10-15 19:57:03,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:57:03,161 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:03,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:03,161 INFO L225 Difference]: With dead ends: 226 [2020-10-15 19:57:03,162 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 19:57:03,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:57:03,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 19:57:03,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-10-15 19:57:03,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:57:03,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-15 19:57:03,165 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-15 19:57:03,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:03,165 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-15 19:57:03,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:03,165 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-15 19:57:03,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:03,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:03,166 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:03,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:03,367 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:03,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:03,367 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-10-15 19:57:03,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:03,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441204161] [2020-10-15 19:57:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:03,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441204161] [2020-10-15 19:57:03,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55006160] [2020-10-15 19:57:03,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:03,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:03,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:03,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:03,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:03,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:03,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:03,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061830739] [2020-10-15 19:57:03,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:03,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:03,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:03,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:03,722 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-15 19:57:04,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:04,137 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-15 19:57:04,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:57:04,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:04,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:04,138 INFO L225 Difference]: With dead ends: 218 [2020-10-15 19:57:04,138 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 19:57:04,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:57:04,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 19:57:04,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-10-15 19:57:04,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:57:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 19:57:04,141 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 19:57:04,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:04,141 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 19:57:04,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 19:57:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:04,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:04,141 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:04,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:04,342 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:04,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:04,343 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-10-15 19:57:04,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:04,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779269951] [2020-10-15 19:57:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:04,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779269951] [2020-10-15 19:57:04,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201693916] [2020-10-15 19:57:04,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:04,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:57:04,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:04,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:04,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:04,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:57:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:04,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:04,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:04,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935479775] [2020-10-15 19:57:04,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:04,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:04,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:04,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:04,730 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 19:57:05,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:05,428 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-10-15 19:57:05,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:57:05,429 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:05,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:05,430 INFO L225 Difference]: With dead ends: 248 [2020-10-15 19:57:05,430 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 19:57:05,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:57:05,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 19:57:05,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-10-15 19:57:05,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:57:05,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 19:57:05,434 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 19:57:05,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:05,434 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 19:57:05,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 19:57:05,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:05,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:05,435 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:05,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:05,637 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:05,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:05,638 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-10-15 19:57:05,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:05,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292379716] [2020-10-15 19:57:05,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:05,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292379716] [2020-10-15 19:57:05,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984771861] [2020-10-15 19:57:05,749 INFO L93 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:05,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:57:05,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:05,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:05,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:05,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:57:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:05,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:05,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:05,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804914499] [2020-10-15 19:57:05,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:05,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:05,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:05,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:05,985 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 19:57:06,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:06,550 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-10-15 19:57:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:57:06,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:06,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:06,552 INFO L225 Difference]: With dead ends: 238 [2020-10-15 19:57:06,552 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:57:06,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:57:06,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:57:06,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-15 19:57:06,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:57:06,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-15 19:57:06,561 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-15 19:57:06,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:06,561 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-15 19:57:06,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:06,561 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-15 19:57:06,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:06,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:06,561 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:06,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:06,762 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:06,763 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-10-15 19:57:06,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:06,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357096556] [2020-10-15 19:57:06,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:06,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357096556] [2020-10-15 19:57:06,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924888640] [2020-10-15 19:57:06,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:06,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:57:06,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:06,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:06,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:07,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:07,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:07,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246580636] [2020-10-15 19:57:07,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:07,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:07,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:07,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:07,221 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-15 19:57:07,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:07,972 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-10-15 19:57:07,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:57:07,974 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:07,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:07,975 INFO L225 Difference]: With dead ends: 235 [2020-10-15 19:57:07,975 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:57:07,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:57:07,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:57:07,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-10-15 19:57:07,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:57:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-15 19:57:07,979 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-15 19:57:07,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:07,979 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-15 19:57:07,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:07,980 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-15 19:57:07,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:07,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:07,980 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:08,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:08,189 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:08,190 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-10-15 19:57:08,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:08,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392439659] [2020-10-15 19:57:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:08,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392439659] [2020-10-15 19:57:08,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467933576] [2020-10-15 19:57:08,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:08,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:57:08,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:08,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:08,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:08,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:08,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:08,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261131561] [2020-10-15 19:57:08,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:08,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:08,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:08,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:08,623 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-15 19:57:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:09,293 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-10-15 19:57:09,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:57:09,294 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:09,294 INFO L225 Difference]: With dead ends: 252 [2020-10-15 19:57:09,295 INFO L226 Difference]: Without dead ends: 250 [2020-10-15 19:57:09,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-15 19:57:09,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-15 19:57:09,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-10-15 19:57:09,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:57:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 19:57:09,298 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 19:57:09,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:09,299 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 19:57:09,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 19:57:09,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:09,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:09,299 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:09,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 19:57:09,500 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:09,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:09,501 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-10-15 19:57:09,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:09,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528789036] [2020-10-15 19:57:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:09,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528789036] [2020-10-15 19:57:09,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629294587] [2020-10-15 19:57:09,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:09,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:09,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:09,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:57:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:09,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:09,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:09,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573072518] [2020-10-15 19:57:09,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:09,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:09,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:09,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:09,898 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 19:57:10,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:10,758 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-10-15 19:57:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:57:10,759 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:10,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:10,760 INFO L225 Difference]: With dead ends: 258 [2020-10-15 19:57:10,760 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 19:57:10,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:57:10,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 19:57:10,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-15 19:57:10,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:57:10,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 19:57:10,763 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 19:57:10,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:10,764 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 19:57:10,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:10,764 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 19:57:10,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:10,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:10,764 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:10,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-15 19:57:10,967 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:10,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:10,968 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-10-15 19:57:10,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:10,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644023152] [2020-10-15 19:57:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:11,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644023152] [2020-10-15 19:57:11,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650829350] [2020-10-15 19:57:11,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:11,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:11,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:11,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:11,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:13,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:57:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:13,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:13,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:13,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241350018] [2020-10-15 19:57:13,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:13,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:13,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:13,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:57:13,423 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 19:57:17,733 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-15 19:57:21,993 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-15 19:57:22,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:22,614 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-10-15 19:57:22,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:57:22,614 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:22,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:22,615 INFO L225 Difference]: With dead ends: 287 [2020-10-15 19:57:22,615 INFO L226 Difference]: Without dead ends: 279 [2020-10-15 19:57:22,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 19:57:22,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-15 19:57:22,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-10-15 19:57:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:57:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-10-15 19:57:22,618 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-10-15 19:57:22,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:22,618 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-10-15 19:57:22,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:22,618 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-10-15 19:57:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:22,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:22,619 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:22,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-15 19:57:22,822 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:22,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:22,822 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-10-15 19:57:22,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:22,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234375891] [2020-10-15 19:57:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:22,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234375891] [2020-10-15 19:57:22,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877673349] [2020-10-15 19:57:22,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:22,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:57:22,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:22,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:22,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:23,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:57:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:23,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:23,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:23,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767369918] [2020-10-15 19:57:23,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:23,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:23,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:23,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:23,222 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 17 states. [2020-10-15 19:57:24,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:24,024 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2020-10-15 19:57:24,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:57:24,025 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:24,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:24,025 INFO L225 Difference]: With dead ends: 260 [2020-10-15 19:57:24,026 INFO L226 Difference]: Without dead ends: 255 [2020-10-15 19:57:24,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 19:57:24,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-15 19:57:24,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-10-15 19:57:24,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:57:24,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-10-15 19:57:24,029 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-10-15 19:57:24,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:24,029 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-10-15 19:57:24,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:24,029 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-10-15 19:57:24,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:24,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:24,030 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:24,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:24,231 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:24,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:24,231 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-10-15 19:57:24,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:24,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135698370] [2020-10-15 19:57:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:24,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135698370] [2020-10-15 19:57:24,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976497501] [2020-10-15 19:57:24,354 INFO L93 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:24,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:57:24,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:24,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:24,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:24,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:24,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:24,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583607298] [2020-10-15 19:57:24,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:24,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:24,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:24,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:24,823 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-10-15 19:57:25,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:25,440 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-10-15 19:57:25,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:57:25,441 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:25,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:25,442 INFO L225 Difference]: With dead ends: 235 [2020-10-15 19:57:25,442 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:57:25,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:57:25,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:57:25,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-10-15 19:57:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-10-15 19:57:25,445 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-10-15 19:57:25,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:25,445 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-10-15 19:57:25,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:25,445 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-10-15 19:57:25,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:25,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:25,446 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:25,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:25,647 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:25,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:25,647 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-10-15 19:57:25,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:25,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330861759] [2020-10-15 19:57:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:25,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330861759] [2020-10-15 19:57:25,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480597726] [2020-10-15 19:57:25,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:25,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:25,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:25,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:25,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:29,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:29,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:29,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913402778] [2020-10-15 19:57:29,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:29,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:29,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:29,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:57:29,980 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-10-15 19:57:34,317 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:57:40,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:40,767 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-10-15 19:57:40,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:57:40,767 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:40,768 INFO L225 Difference]: With dead ends: 241 [2020-10-15 19:57:40,768 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 19:57:40,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-10-15 19:57:40,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 19:57:40,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-15 19:57:40,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-10-15 19:57:40,772 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-10-15 19:57:40,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:40,772 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-10-15 19:57:40,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:40,772 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-10-15 19:57:40,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:40,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:40,773 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:40,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-15 19:57:40,973 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:40,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:40,974 INFO L82 PathProgramCache]: Analyzing trace with hash -763559652, now seen corresponding path program 162 times [2020-10-15 19:57:40,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:40,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029079680] [2020-10-15 19:57:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:41,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029079680] [2020-10-15 19:57:41,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027954997] [2020-10-15 19:57:41,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:41,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:57:41,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:41,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:41,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:41,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:41,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:41,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020349] [2020-10-15 19:57:41,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:41,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:41,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:41,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:41,460 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-10-15 19:57:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:42,009 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-10-15 19:57:42,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:57:42,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:42,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:42,010 INFO L225 Difference]: With dead ends: 235 [2020-10-15 19:57:42,011 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:57:42,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:57:42,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:57:42,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-15 19:57:42,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:57:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-15 19:57:42,014 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-15 19:57:42,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:42,014 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-15 19:57:42,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:42,014 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-15 19:57:42,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:42,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:42,015 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:42,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:42,215 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:42,216 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 163 times [2020-10-15 19:57:42,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:42,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952478169] [2020-10-15 19:57:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:42,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952478169] [2020-10-15 19:57:42,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759538556] [2020-10-15 19:57:42,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:42,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:42,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:42,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:42,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:42,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060450298] [2020-10-15 19:57:42,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:42,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:42,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:42,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:42,622 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-15 19:57:43,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:43,417 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-10-15 19:57:43,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 19:57:43,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:43,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:43,419 INFO L225 Difference]: With dead ends: 254 [2020-10-15 19:57:43,419 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 19:57:43,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:57:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 19:57:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-10-15 19:57:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:57:43,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-10-15 19:57:43,423 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-10-15 19:57:43,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:43,423 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-10-15 19:57:43,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-10-15 19:57:43,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:43,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:43,424 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:43,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-15 19:57:43,625 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:43,625 INFO L82 PathProgramCache]: Analyzing trace with hash -743032692, now seen corresponding path program 164 times [2020-10-15 19:57:43,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:43,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691641863] [2020-10-15 19:57:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:43,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691641863] [2020-10-15 19:57:43,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521664736] [2020-10-15 19:57:43,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:43,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:43,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:43,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:43,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:44,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:44,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:44,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:44,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591608211] [2020-10-15 19:57:44,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:44,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:44,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:44,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:44,959 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-10-15 19:57:49,347 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:58:04,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:04,136 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-10-15 19:58:04,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 19:58:04,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:04,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:04,138 INFO L225 Difference]: With dead ends: 264 [2020-10-15 19:58:04,138 INFO L226 Difference]: Without dead ends: 262 [2020-10-15 19:58:04,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-10-15 19:58:04,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-15 19:58:04,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-10-15 19:58:04,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 19:58:04,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-15 19:58:04,141 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-15 19:58:04,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:04,141 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-15 19:58:04,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-15 19:58:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:04,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:04,141 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:04,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:04,342 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:04,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:04,343 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 165 times [2020-10-15 19:58:04,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:04,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011004691] [2020-10-15 19:58:04,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:04,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011004691] [2020-10-15 19:58:04,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997667503] [2020-10-15 19:58:04,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:04,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:58:04,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:04,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:04,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:04,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:04,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:04,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466137370] [2020-10-15 19:58:04,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:04,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:04,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:04,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:04,802 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-15 19:58:05,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:05,625 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-10-15 19:58:05,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 19:58:05,626 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:05,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:05,626 INFO L225 Difference]: With dead ends: 255 [2020-10-15 19:58:05,626 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 19:58:05,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:58:05,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 19:58:05,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-15 19:58:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:58:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 19:58:05,629 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 19:58:05,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:05,630 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 19:58:05,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:05,630 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 19:58:05,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:05,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:05,630 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:05,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:05,831 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:05,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:05,831 INFO L82 PathProgramCache]: Analyzing trace with hash -742349204, now seen corresponding path program 166 times [2020-10-15 19:58:05,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:05,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772423409] [2020-10-15 19:58:05,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:05,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772423409] [2020-10-15 19:58:05,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072563316] [2020-10-15 19:58:05,947 INFO L93 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:05,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:58:05,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:05,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:05,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:06,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:58:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:06,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:06,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:06,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336313418] [2020-10-15 19:58:06,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:06,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:06,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:06,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:06,222 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 19:58:07,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:07,305 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-10-15 19:58:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:58:07,306 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:07,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:07,306 INFO L225 Difference]: With dead ends: 256 [2020-10-15 19:58:07,307 INFO L226 Difference]: Without dead ends: 251 [2020-10-15 19:58:07,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 19:58:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-15 19:58:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-10-15 19:58:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:58:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 19:58:07,310 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 19:58:07,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:07,310 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 19:58:07,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:07,310 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 19:58:07,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:07,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:07,311 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:07,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 19:58:07,511 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash -742348243, now seen corresponding path program 167 times [2020-10-15 19:58:07,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:07,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187218201] [2020-10-15 19:58:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:07,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187218201] [2020-10-15 19:58:07,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202422628] [2020-10-15 19:58:07,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:07,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:58:07,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:07,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:07,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:07,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:58:07,924 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:58:07,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:58:07,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:58:07,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:58:07,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:58:07,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:58:07,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:58:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:08,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:08,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:08,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656105118] [2020-10-15 19:58:08,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:08,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:08,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:08,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:08,008 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 19:58:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:09,287 INFO L93 Difference]: Finished difference Result 279 states and 667 transitions. [2020-10-15 19:58:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:58:09,289 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:09,289 INFO L225 Difference]: With dead ends: 279 [2020-10-15 19:58:09,290 INFO L226 Difference]: Without dead ends: 274 [2020-10-15 19:58:09,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 19:58:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-15 19:58:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 165. [2020-10-15 19:58:09,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 19:58:09,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-15 19:58:09,293 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-15 19:58:09,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:09,293 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-15 19:58:09,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:09,293 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-15 19:58:09,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:09,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:09,293 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:09,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 19:58:09,494 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:09,495 INFO L82 PathProgramCache]: Analyzing trace with hash -742340772, now seen corresponding path program 168 times [2020-10-15 19:58:09,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:09,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143334182] [2020-10-15 19:58:09,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:09,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:09,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143334182] [2020-10-15 19:58:09,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576408721] [2020-10-15 19:58:09,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:09,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:58:09,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:09,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:09,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:13,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:13,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:13,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747831584] [2020-10-15 19:58:13,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:13,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:13,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:13,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:58:13,062 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-15 19:58:17,466 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 19:58:21,728 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:58:22,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:22,405 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-10-15 19:58:22,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 19:58:22,406 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:22,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:22,406 INFO L225 Difference]: With dead ends: 271 [2020-10-15 19:58:22,407 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 19:58:22,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 19:58:22,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 19:58:22,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-10-15 19:58:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:58:22,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 19:58:22,411 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 19:58:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:22,411 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 19:58:22,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:22,411 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 19:58:22,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:22,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:22,412 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:22,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 19:58:22,618 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:22,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:22,618 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 169 times [2020-10-15 19:58:22,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:22,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957578673] [2020-10-15 19:58:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:22,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957578673] [2020-10-15 19:58:22,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307940107] [2020-10-15 19:58:22,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:22,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:22,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:30,329 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-15 19:58:30,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:58:30,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:58:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:30,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:30,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:30,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653927951] [2020-10-15 19:58:30,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:30,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:30,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:30,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=181, Unknown=4, NotChecked=0, Total=272 [2020-10-15 19:58:30,398 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 19:58:34,792 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 19:58:36,011 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-10-15 19:58:40,152 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 19:58:54,483 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-15 19:58:59,735 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-15 19:59:12,462 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-15 19:59:20,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:20,791 INFO L93 Difference]: Finished difference Result 299 states and 714 transitions. [2020-10-15 19:59:20,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 19:59:20,792 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:20,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:20,793 INFO L225 Difference]: With dead ends: 299 [2020-10-15 19:59:20,793 INFO L226 Difference]: Without dead ends: 291 [2020-10-15 19:59:20,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=434, Invalid=955, Unknown=17, NotChecked=0, Total=1406 [2020-10-15 19:59:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-15 19:59:20,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 168. [2020-10-15 19:59:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-15 19:59:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-10-15 19:59:20,797 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-10-15 19:59:20,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:20,797 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-10-15 19:59:20,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-10-15 19:59:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:20,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:20,798 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:20,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-10-15 19:59:20,999 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:20,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:20,999 INFO L82 PathProgramCache]: Analyzing trace with hash -742318452, now seen corresponding path program 170 times [2020-10-15 19:59:20,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:21,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349394583] [2020-10-15 19:59:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:21,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349394583] [2020-10-15 19:59:21,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010310711] [2020-10-15 19:59:21,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:21,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:59:21,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:21,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:21,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:23,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:59:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:23,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:23,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:23,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518376916] [2020-10-15 19:59:23,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:23,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:23,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:23,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:59:23,554 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-10-15 19:59:25,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:25,575 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-10-15 19:59:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 19:59:25,576 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:25,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:25,577 INFO L225 Difference]: With dead ends: 292 [2020-10-15 19:59:25,577 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 19:59:25,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-10-15 19:59:25,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 19:59:25,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-10-15 19:59:25,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:59:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-15 19:59:25,581 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-15 19:59:25,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:25,581 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-15 19:59:25,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-15 19:59:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:25,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:25,582 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:25,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 19:59:25,783 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:25,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:25,783 INFO L82 PathProgramCache]: Analyzing trace with hash -742110132, now seen corresponding path program 171 times [2020-10-15 19:59:25,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:25,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893025953] [2020-10-15 19:59:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:25,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893025953] [2020-10-15 19:59:25,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165250412] [2020-10-15 19:59:25,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:25,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:59:25,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:25,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:25,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:26,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:26,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:26,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565461646] [2020-10-15 19:59:26,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:26,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:26,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:26,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:26,267 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-15 19:59:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:26,875 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-10-15 19:59:26,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:59:26,876 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:26,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:26,876 INFO L225 Difference]: With dead ends: 231 [2020-10-15 19:59:26,877 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 19:59:26,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:59:26,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 19:59:26,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-10-15 19:59:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:59:26,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-15 19:59:26,879 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-15 19:59:26,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:26,879 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-15 19:59:26,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:26,879 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-15 19:59:26,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:26,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:26,880 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:27,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-10-15 19:59:27,081 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:27,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:27,081 INFO L82 PathProgramCache]: Analyzing trace with hash -741447042, now seen corresponding path program 172 times [2020-10-15 19:59:27,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:27,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306931701] [2020-10-15 19:59:27,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:27,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306931701] [2020-10-15 19:59:27,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879479543] [2020-10-15 19:59:27,224 INFO L93 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:27,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:59:27,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:27,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:27,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:27,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:27,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:27,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948753612] [2020-10-15 19:59:27,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:27,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:27,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:27,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:27,567 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-15 19:59:28,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:28,637 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-10-15 19:59:28,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:59:28,639 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:28,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:28,640 INFO L225 Difference]: With dead ends: 250 [2020-10-15 19:59:28,640 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 19:59:28,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:59:28,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 19:59:28,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-10-15 19:59:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:59:28,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-10-15 19:59:28,643 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-10-15 19:59:28,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:28,643 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-10-15 19:59:28,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:28,643 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-10-15 19:59:28,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:28,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:28,644 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:28,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:28,845 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:28,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:28,845 INFO L82 PathProgramCache]: Analyzing trace with hash -741424722, now seen corresponding path program 173 times [2020-10-15 19:59:28,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:28,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695839115] [2020-10-15 19:59:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:28,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695839115] [2020-10-15 19:59:28,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873132375] [2020-10-15 19:59:28,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:29,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:59:29,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:29,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:29,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:29,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:59:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:29,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:29,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:29,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342426122] [2020-10-15 19:59:29,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:29,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:29,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:29,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:29,336 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-10-15 19:59:30,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:30,924 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-10-15 19:59:30,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 19:59:30,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:30,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:30,925 INFO L225 Difference]: With dead ends: 288 [2020-10-15 19:59:30,925 INFO L226 Difference]: Without dead ends: 283 [2020-10-15 19:59:30,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 19:59:30,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-15 19:59:30,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-10-15 19:59:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 19:59:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-10-15 19:59:30,929 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-10-15 19:59:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:30,929 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-10-15 19:59:30,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-10-15 19:59:30,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:30,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:30,930 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:31,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-10-15 19:59:31,131 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:31,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:31,131 INFO L82 PathProgramCache]: Analyzing trace with hash -541944403, now seen corresponding path program 174 times [2020-10-15 19:59:31,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:31,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231315719] [2020-10-15 19:59:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:31,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231315719] [2020-10-15 19:59:31,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384743298] [2020-10-15 19:59:31,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:31,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:59:31,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:31,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:31,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:31,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:31,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:31,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525676218] [2020-10-15 19:59:31,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:31,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:31,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:31,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:31,577 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-10-15 19:59:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:32,265 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-10-15 19:59:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:59:32,266 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:32,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:32,267 INFO L225 Difference]: With dead ends: 236 [2020-10-15 19:59:32,267 INFO L226 Difference]: Without dead ends: 234 [2020-10-15 19:59:32,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:59:32,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-15 19:59:32,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-10-15 19:59:32,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:59:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 19:59:32,271 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 19:59:32,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:32,271 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 19:59:32,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:32,271 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 19:59:32,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:32,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:32,271 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:32,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:32,472 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:32,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:32,473 INFO L82 PathProgramCache]: Analyzing trace with hash -541943442, now seen corresponding path program 175 times [2020-10-15 19:59:32,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:32,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468541331] [2020-10-15 19:59:32,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:32,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468541331] [2020-10-15 19:59:32,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530356974] [2020-10-15 19:59:32,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:32,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:32,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:33,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:33,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:33,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371433356] [2020-10-15 19:59:33,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:33,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:33,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:33,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:33,009 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 19:59:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:33,742 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-10-15 19:59:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:59:33,744 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:33,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:33,745 INFO L225 Difference]: With dead ends: 246 [2020-10-15 19:59:33,745 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 19:59:33,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:59:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 19:59:33,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-10-15 19:59:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:59:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 19:59:33,748 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 19:59:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:33,748 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 19:59:33,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:33,748 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 19:59:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:33,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:33,749 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:33,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:33,949 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:33,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:33,950 INFO L82 PathProgramCache]: Analyzing trace with hash -541914612, now seen corresponding path program 176 times [2020-10-15 19:59:33,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:33,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995769814] [2020-10-15 19:59:33,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:34,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995769814] [2020-10-15 19:59:34,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704768527] [2020-10-15 19:59:34,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:34,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:59:34,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:34,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:34,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:34,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:34,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:34,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451137419] [2020-10-15 19:59:34,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:34,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:34,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:34,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:34,442 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 19:59:35,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:35,078 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-10-15 19:59:35,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:59:35,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:35,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:35,080 INFO L225 Difference]: With dead ends: 239 [2020-10-15 19:59:35,080 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 19:59:35,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:59:35,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 19:59:35,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-15 19:59:35,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:59:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 19:59:35,083 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 19:59:35,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:35,083 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 19:59:35,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:35,084 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 19:59:35,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:35,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:35,084 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:35,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:35,285 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:35,285 INFO L82 PathProgramCache]: Analyzing trace with hash -540990130, now seen corresponding path program 177 times [2020-10-15 19:59:35,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:35,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519567223] [2020-10-15 19:59:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:35,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519567223] [2020-10-15 19:59:35,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607194852] [2020-10-15 19:59:35,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:35,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:59:35,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:35,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:35,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:35,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:35,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:35,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480088963] [2020-10-15 19:59:35,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:35,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:35,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:35,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:35,795 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 19:59:36,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:36,316 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-10-15 19:59:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:59:36,318 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:36,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:36,318 INFO L225 Difference]: With dead ends: 229 [2020-10-15 19:59:36,318 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 19:59:36,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:59:36,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 19:59:36,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-15 19:59:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 19:59:36,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-15 19:59:36,322 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-15 19:59:36,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:36,322 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-15 19:59:36,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:36,322 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-15 19:59:36,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:36,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:36,323 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:36,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 19:59:36,524 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:36,524 INFO L82 PathProgramCache]: Analyzing trace with hash 95285087, now seen corresponding path program 178 times [2020-10-15 19:59:36,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:36,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588708714] [2020-10-15 19:59:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:36,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588708714] [2020-10-15 19:59:36,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502280410] [2020-10-15 19:59:36,661 INFO L93 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:36,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:59:36,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:36,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:36,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:36,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:36,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:36,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039079381] [2020-10-15 19:59:36,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:36,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:36,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:36,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:36,953 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-15 19:59:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:37,857 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-10-15 19:59:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 19:59:37,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:37,859 INFO L225 Difference]: With dead ends: 261 [2020-10-15 19:59:37,859 INFO L226 Difference]: Without dead ends: 259 [2020-10-15 19:59:37,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 19:59:37,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-15 19:59:37,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-10-15 19:59:37,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:59:37,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-10-15 19:59:37,863 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-10-15 19:59:37,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:37,863 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-10-15 19:59:37,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:37,863 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-10-15 19:59:37,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:37,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:37,864 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:38,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:38,065 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:38,065 INFO L82 PathProgramCache]: Analyzing trace with hash 95286048, now seen corresponding path program 179 times [2020-10-15 19:59:38,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:38,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258435714] [2020-10-15 19:59:38,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:38,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258435714] [2020-10-15 19:59:38,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281417296] [2020-10-15 19:59:38,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:38,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:59:38,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:38,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:38,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:38,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:38,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:38,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35574458] [2020-10-15 19:59:38,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:38,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:38,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:38,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:38,544 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-10-15 19:59:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:39,455 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-10-15 19:59:39,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:59:39,456 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:39,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:39,457 INFO L225 Difference]: With dead ends: 271 [2020-10-15 19:59:39,457 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 19:59:39,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 19:59:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 19:59:39,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-10-15 19:59:39,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:59:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-10-15 19:59:39,461 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-10-15 19:59:39,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:39,461 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-10-15 19:59:39,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:39,461 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-10-15 19:59:39,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:39,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:39,462 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:39,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 19:59:39,670 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:39,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:39,670 INFO L82 PathProgramCache]: Analyzing trace with hash 95314878, now seen corresponding path program 180 times [2020-10-15 19:59:39,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:39,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207681896] [2020-10-15 19:59:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:39,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207681896] [2020-10-15 19:59:39,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137224743] [2020-10-15 19:59:39,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:39,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:59:39,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:39,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:39,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:40,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:40,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:40,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3848392] [2020-10-15 19:59:40,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:40,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:40,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:40,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:40,090 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-10-15 19:59:40,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:40,899 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-10-15 19:59:40,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:59:40,900 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:40,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:40,901 INFO L225 Difference]: With dead ends: 253 [2020-10-15 19:59:40,901 INFO L226 Difference]: Without dead ends: 251 [2020-10-15 19:59:40,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:59:40,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-15 19:59:40,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-10-15 19:59:40,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 19:59:40,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-15 19:59:40,904 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-15 19:59:40,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:40,904 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-15 19:59:40,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:40,904 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-15 19:59:40,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:40,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:40,904 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:41,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 19:59:41,105 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:41,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:41,108 INFO L82 PathProgramCache]: Analyzing trace with hash 115840877, now seen corresponding path program 181 times [2020-10-15 19:59:41,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:41,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460789435] [2020-10-15 19:59:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:41,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460789435] [2020-10-15 19:59:41,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387424066] [2020-10-15 19:59:41,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:41,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:41,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:41,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:41,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:41,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951081616] [2020-10-15 19:59:41,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:41,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:41,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:41,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:41,547 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-15 19:59:42,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:42,611 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-10-15 19:59:42,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 19:59:42,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:42,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:42,613 INFO L225 Difference]: With dead ends: 268 [2020-10-15 19:59:42,614 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 19:59:42,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 19:59:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 19:59:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-10-15 19:59:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:59:42,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 19:59:42,617 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 19:59:42,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:42,617 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 19:59:42,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:42,617 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 19:59:42,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:42,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:42,618 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:42,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:42,819 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:42,819 INFO L82 PathProgramCache]: Analyzing trace with hash 115841838, now seen corresponding path program 182 times [2020-10-15 19:59:42,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:42,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584162584] [2020-10-15 19:59:42,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:42,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584162584] [2020-10-15 19:59:42,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354196632] [2020-10-15 19:59:42,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:42,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:59:43,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:43,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:43,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:43,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:43,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:43,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131729219] [2020-10-15 19:59:43,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:43,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:43,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:43,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:43,254 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 19:59:44,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:44,253 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-10-15 19:59:44,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 19:59:44,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:44,255 INFO L225 Difference]: With dead ends: 271 [2020-10-15 19:59:44,255 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 19:59:44,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 19:59:44,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 19:59:44,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-15 19:59:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 19:59:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-15 19:59:44,258 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-15 19:59:44,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:44,258 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-15 19:59:44,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:44,258 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-15 19:59:44,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:44,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:44,259 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:44,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 19:59:44,460 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:44,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:44,460 INFO L82 PathProgramCache]: Analyzing trace with hash 116503967, now seen corresponding path program 183 times [2020-10-15 19:59:44,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:44,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753097379] [2020-10-15 19:59:44,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:44,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753097379] [2020-10-15 19:59:44,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88559110] [2020-10-15 19:59:44,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:44,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:59:44,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:44,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:44,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:44,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:44,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:44,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598451542] [2020-10-15 19:59:44,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:44,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:44,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:44,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:44,934 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-15 19:59:45,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:45,949 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-10-15 19:59:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:59:45,950 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:45,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:45,950 INFO L225 Difference]: With dead ends: 262 [2020-10-15 19:59:45,950 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 19:59:45,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 19:59:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 19:59:45,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-10-15 19:59:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 19:59:45,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 19:59:45,953 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 19:59:45,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:45,954 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 19:59:45,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:45,954 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 19:59:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:45,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:45,954 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:46,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-10-15 19:59:46,155 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:46,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:46,156 INFO L82 PathProgramCache]: Analyzing trace with hash 116525326, now seen corresponding path program 184 times [2020-10-15 19:59:46,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:46,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364600319] [2020-10-15 19:59:46,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:46,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364600319] [2020-10-15 19:59:46,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710443433] [2020-10-15 19:59:46,294 INFO L93 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:46,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:59:46,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:46,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:46,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:46,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:59:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:46,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:46,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:46,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803983980] [2020-10-15 19:59:46,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:46,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:46,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:46,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:46,568 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 19:59:47,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:47,586 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-10-15 19:59:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:59:47,587 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:47,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:47,588 INFO L225 Difference]: With dead ends: 248 [2020-10-15 19:59:47,588 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 19:59:47,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 19:59:47,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 19:59:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-10-15 19:59:47,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 19:59:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 19:59:47,592 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 19:59:47,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:47,592 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 19:59:47,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:47,592 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 19:59:47,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:47,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:47,593 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:47,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:47,793 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:47,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:47,794 INFO L82 PathProgramCache]: Analyzing trace with hash 116526287, now seen corresponding path program 185 times [2020-10-15 19:59:47,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:47,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235309335] [2020-10-15 19:59:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:47,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235309335] [2020-10-15 19:59:47,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329563424] [2020-10-15 19:59:47,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:48,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:59:48,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:48,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:48,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:48,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:59:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:48,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:48,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:48,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371196552] [2020-10-15 19:59:48,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:48,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:48,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:48,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:48,253 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 19:59:49,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:49,718 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-10-15 19:59:49,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 19:59:49,720 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:49,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:49,720 INFO L225 Difference]: With dead ends: 287 [2020-10-15 19:59:49,720 INFO L226 Difference]: Without dead ends: 282 [2020-10-15 19:59:49,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 19:59:49,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-15 19:59:49,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-10-15 19:59:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 19:59:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-15 19:59:49,723 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-15 19:59:49,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:49,723 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-15 19:59:49,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:49,723 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-15 19:59:49,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:49,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:49,724 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:49,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:49,925 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:49,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:49,925 INFO L82 PathProgramCache]: Analyzing trace with hash 116533758, now seen corresponding path program 186 times [2020-10-15 19:59:49,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:49,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642664109] [2020-10-15 19:59:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:50,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642664109] [2020-10-15 19:59:50,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894687211] [2020-10-15 19:59:50,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:50,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:59:50,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:50,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:50,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:50,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:50,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:50,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732993246] [2020-10-15 19:59:50,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:50,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:50,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:50,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:50,398 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-15 19:59:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:52,000 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-10-15 19:59:52,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 19:59:52,002 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:52,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:52,003 INFO L225 Difference]: With dead ends: 284 [2020-10-15 19:59:52,003 INFO L226 Difference]: Without dead ends: 282 [2020-10-15 19:59:52,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 19:59:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-15 19:59:52,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-10-15 19:59:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 19:59:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 19:59:52,007 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 19:59:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:52,007 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 19:59:52,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 19:59:52,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:52,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:52,008 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:52,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:52,208 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:52,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:52,209 INFO L82 PathProgramCache]: Analyzing trace with hash 116555117, now seen corresponding path program 187 times [2020-10-15 19:59:52,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:52,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280892478] [2020-10-15 19:59:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:52,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280892478] [2020-10-15 19:59:52,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913835400] [2020-10-15 19:59:52,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:52,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:52,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:52,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:59:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:52,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:52,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:52,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274953081] [2020-10-15 19:59:52,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:52,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:52,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:52,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:52,952 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 19:59:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:54,427 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-10-15 19:59:54,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 19:59:54,428 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:54,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:54,429 INFO L225 Difference]: With dead ends: 289 [2020-10-15 19:59:54,429 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 19:59:54,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 19:59:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 19:59:54,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-10-15 19:59:54,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-15 19:59:54,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-10-15 19:59:54,433 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-10-15 19:59:54,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:54,433 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-10-15 19:59:54,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:54,433 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-10-15 19:59:54,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:54,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:54,434 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:54,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:54,635 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:54,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:54,635 INFO L82 PathProgramCache]: Analyzing trace with hash 116556078, now seen corresponding path program 188 times [2020-10-15 19:59:54,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:54,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966097407] [2020-10-15 19:59:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:54,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966097407] [2020-10-15 19:59:54,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604004913] [2020-10-15 19:59:54,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:54,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:59:54,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:54,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:54,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:55,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:59:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:55,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:55,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:55,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887501868] [2020-10-15 19:59:55,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:55,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:55,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:55,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:55,120 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-10-15 19:59:56,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:56,843 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-10-15 19:59:56,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 19:59:56,844 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:56,845 INFO L225 Difference]: With dead ends: 312 [2020-10-15 19:59:56,845 INFO L226 Difference]: Without dead ends: 304 [2020-10-15 19:59:56,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 19:59:56,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-15 19:59:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-10-15 19:59:56,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 19:59:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-15 19:59:56,849 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-15 19:59:56,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:56,849 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-15 19:59:56,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:56,849 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-15 19:59:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:56,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:56,850 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:57,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:57,051 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:57,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:57,051 INFO L82 PathProgramCache]: Analyzing trace with hash 116764398, now seen corresponding path program 189 times [2020-10-15 19:59:57,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:57,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850159140] [2020-10-15 19:59:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:57,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850159140] [2020-10-15 19:59:57,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387085456] [2020-10-15 19:59:57,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:57,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:59:57,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:57,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:57,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:57,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:57,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:57,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172640029] [2020-10-15 19:59:57,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:57,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:57,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:57,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:57,508 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-15 19:59:58,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:58,429 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-10-15 19:59:58,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:59:58,430 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:58,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:58,431 INFO L225 Difference]: With dead ends: 262 [2020-10-15 19:59:58,431 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 19:59:58,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:59:58,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 19:59:58,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-10-15 19:59:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:59:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 19:59:58,435 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 19:59:58,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:58,435 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 19:59:58,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:58,435 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 19:59:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:58,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:58,436 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:58,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-15 19:59:58,645 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:58,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:58,646 INFO L82 PathProgramCache]: Analyzing trace with hash 117427488, now seen corresponding path program 190 times [2020-10-15 19:59:58,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:58,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298608928] [2020-10-15 19:59:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:58,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298608928] [2020-10-15 19:59:58,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896856314] [2020-10-15 19:59:58,788 INFO L93 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:58,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:59:58,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:58,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:58,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:59,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:59,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:59,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028131390] [2020-10-15 19:59:59,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:59,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:59,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:59,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:59,101 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 20:00:00,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:00:00,284 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-10-15 20:00:00,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:00:00,286 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:00:00,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:00:00,287 INFO L225 Difference]: With dead ends: 271 [2020-10-15 20:00:00,287 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 20:00:00,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:00:00,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 20:00:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-15 20:00:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:00:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 20:00:00,295 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 20:00:00,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:00:00,295 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 20:00:00,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:00:00,295 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 20:00:00,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:00:00,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:00:00,296 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:00:00,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-15 20:00:00,496 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:00:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:00:00,497 INFO L82 PathProgramCache]: Analyzing trace with hash 117448847, now seen corresponding path program 191 times [2020-10-15 20:00:00,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:00:00,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399301415] [2020-10-15 20:00:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:00:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:00,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399301415] [2020-10-15 20:00:00,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178440440] [2020-10-15 20:00:00,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:00,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:00:00,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:00:00,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:00:00,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:00:00,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:00:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:00,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:00:00,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:00:00,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758179604] [2020-10-15 20:00:00,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:00:00,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:00:00,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:00:00,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:00:00,912 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 20:00:02,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:00:02,356 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-10-15 20:00:02,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:00:02,357 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:00:02,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:00:02,358 INFO L225 Difference]: With dead ends: 296 [2020-10-15 20:00:02,358 INFO L226 Difference]: Without dead ends: 288 [2020-10-15 20:00:02,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:00:02,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-15 20:00:02,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-10-15 20:00:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 20:00:02,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-15 20:00:02,361 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-15 20:00:02,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:00:02,362 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-15 20:00:02,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:00:02,362 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-15 20:00:02,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:00:02,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:00:02,362 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:00:02,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-10-15 20:00:02,567 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:00:02,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:00:02,567 INFO L82 PathProgramCache]: Analyzing trace with hash 117449808, now seen corresponding path program 192 times [2020-10-15 20:00:02,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:00:02,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29931174] [2020-10-15 20:00:02,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:00:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:02,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29931174] [2020-10-15 20:00:02,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340946738] [2020-10-15 20:00:02,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:02,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:00:02,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:00:02,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:00:02,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:00:02,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:00:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:02,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:00:02,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:00:02,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646247829] [2020-10-15 20:00:02,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:00:02,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:00:02,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:00:02,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:00:02,965 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-15 20:00:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:00:04,345 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-10-15 20:00:04,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:00:04,346 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:00:04,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:00:04,346 INFO L225 Difference]: With dead ends: 298 [2020-10-15 20:00:04,347 INFO L226 Difference]: Without dead ends: 290 [2020-10-15 20:00:04,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:00:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-15 20:00:04,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-10-15 20:00:04,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:00:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-10-15 20:00:04,351 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-10-15 20:00:04,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:00:04,351 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-10-15 20:00:04,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:00:04,351 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-10-15 20:00:04,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:00:04,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:00:04,352 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:00:04,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-15 20:00:04,552 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:00:04,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:00:04,553 INFO L82 PathProgramCache]: Analyzing trace with hash 117478638, now seen corresponding path program 193 times [2020-10-15 20:00:04,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:00:04,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898475224] [2020-10-15 20:00:04,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:00:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:04,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898475224] [2020-10-15 20:00:04,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029164280] [2020-10-15 20:00:04,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:04,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:00:04,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:00:04,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:00:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:04,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:00:04,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:00:04,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252614876] [2020-10-15 20:00:04,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:00:04,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:00:04,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:00:04,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:00:04,981 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-10-15 20:00:06,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:00:06,480 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-10-15 20:00:06,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:00:06,481 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:00:06,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:00:06,481 INFO L225 Difference]: With dead ends: 291 [2020-10-15 20:00:06,482 INFO L226 Difference]: Without dead ends: 283 [2020-10-15 20:00:06,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:00:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-15 20:00:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-10-15 20:00:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:00:06,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 20:00:06,485 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 20:00:06,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:00:06,486 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 20:00:06,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:00:06,486 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 20:00:06,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:00:06,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:00:06,486 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:00:06,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-10-15 20:00:06,687 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:00:06,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:00:06,687 INFO L82 PathProgramCache]: Analyzing trace with hash 144470028, now seen corresponding path program 194 times [2020-10-15 20:00:06,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:00:06,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143210776] [2020-10-15 20:00:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:00:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:06,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143210776] [2020-10-15 20:00:06,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235344646] [2020-10-15 20:00:06,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:06,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:00:06,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:00:06,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:00:06,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:00:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:07,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:00:07,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:00:07,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563436262] [2020-10-15 20:00:07,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:00:07,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:00:07,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:00:07,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:00:07,162 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 20:00:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:00:08,407 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-10-15 20:00:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:00:08,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:00:08,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:00:08,409 INFO L225 Difference]: With dead ends: 265 [2020-10-15 20:00:08,409 INFO L226 Difference]: Without dead ends: 263 [2020-10-15 20:00:08,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:00:08,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-15 20:00:08,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-10-15 20:00:08,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:00:08,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 20:00:08,412 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 20:00:08,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:00:08,412 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 20:00:08,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:00:08,412 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 20:00:08,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:00:08,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:00:08,413 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:00:08,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:08,614 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:00:08,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:00:08,614 INFO L82 PathProgramCache]: Analyzing trace with hash 145133118, now seen corresponding path program 195 times [2020-10-15 20:00:08,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:00:08,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122462175] [2020-10-15 20:00:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:00:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:08,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122462175] [2020-10-15 20:00:08,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824542639] [2020-10-15 20:00:08,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:08,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:00:08,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:00:08,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:00:08,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:00:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:09,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:00:09,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:00:09,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306964215] [2020-10-15 20:00:09,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:00:09,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:00:09,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:00:09,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:00:09,102 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 20:00:10,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:00:10,613 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-10-15 20:00:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:00:10,615 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:00:10,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:00:10,616 INFO L225 Difference]: With dead ends: 262 [2020-10-15 20:00:10,616 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 20:00:10,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:00:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 20:00:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-10-15 20:00:10,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:00:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 20:00:10,620 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 20:00:10,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:00:10,620 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 20:00:10,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:00:10,620 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 20:00:10,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:00:10,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:00:10,621 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:00:10,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-10-15 20:00:10,822 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:00:10,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:00:10,822 INFO L82 PathProgramCache]: Analyzing trace with hash 145155438, now seen corresponding path program 196 times [2020-10-15 20:00:10,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:00:10,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017488431] [2020-10-15 20:00:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:00:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:10,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017488431] [2020-10-15 20:00:10,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109741799] [2020-10-15 20:00:10,971 INFO L93 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:11,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:00:11,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:00:11,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:00:11,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:00:11,255 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:00:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:11,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:00:11,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:00:11,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923533676] [2020-10-15 20:00:11,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:00:11,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:00:11,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:00:11,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:00:11,289 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 20:00:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:00:13,495 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-10-15 20:00:13,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:00:13,497 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:00:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:00:13,497 INFO L225 Difference]: With dead ends: 285 [2020-10-15 20:00:13,498 INFO L226 Difference]: Without dead ends: 280 [2020-10-15 20:00:13,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:00:13,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-15 20:00:13,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-10-15 20:00:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:00:13,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 20:00:13,501 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 20:00:13,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:00:13,501 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 20:00:13,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:00:13,501 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 20:00:13,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:00:13,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:00:13,502 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:00:13,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:13,703 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:00:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:00:13,703 INFO L82 PathProgramCache]: Analyzing trace with hash 145184268, now seen corresponding path program 197 times [2020-10-15 20:00:13,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:00:13,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982629004] [2020-10-15 20:00:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:00:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:13,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982629004] [2020-10-15 20:00:13,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647182269] [2020-10-15 20:00:13,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:13,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:00:13,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:00:13,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:00:13,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:00:18,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:00:22,498 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-15 20:00:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:22,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:00:22,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 20:00:22,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258853468] [2020-10-15 20:00:22,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:00:22,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:00:22,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:00:22,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-10-15 20:00:22,501 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-10-15 20:00:26,711 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-15 20:00:31,331 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 20:00:35,533 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2020-10-15 20:00:40,010 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-15 20:00:42,236 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 20:00:49,110 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-15 20:00:53,616 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-10-15 20:01:24,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:24,272 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-10-15 20:01:24,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:01:24,275 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 20:01:24,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:24,276 INFO L225 Difference]: With dead ends: 302 [2020-10-15 20:01:24,276 INFO L226 Difference]: Without dead ends: 297 [2020-10-15 20:01:24,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=565, Invalid=1408, Unknown=7, NotChecked=0, Total=1980 [2020-10-15 20:01:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-15 20:01:24,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-10-15 20:01:24,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:01:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-10-15 20:01:24,279 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-10-15 20:01:24,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:24,280 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-10-15 20:01:24,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:01:24,280 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-10-15 20:01:24,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:24,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:24,280 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:24,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:24,481 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:24,481 INFO L82 PathProgramCache]: Analyzing trace with hash 146086430, now seen corresponding path program 198 times [2020-10-15 20:01:24,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:24,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547651204] [2020-10-15 20:01:24,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:24,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547651204] [2020-10-15 20:01:24,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777774833] [2020-10-15 20:01:24,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:24,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:01:24,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:24,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:24,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:24,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:24,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:24,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127689390] [2020-10-15 20:01:24,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:24,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:24,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:24,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:24,965 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-10-15 20:01:25,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:25,523 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-10-15 20:01:25,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:01:25,525 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:25,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:25,525 INFO L225 Difference]: With dead ends: 219 [2020-10-15 20:01:25,526 INFO L226 Difference]: Without dead ends: 217 [2020-10-15 20:01:25,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:01:25,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-15 20:01:25,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-10-15 20:01:25,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:01:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 20:01:25,529 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 20:01:25,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:25,529 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 20:01:25,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:25,529 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 20:01:25,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:25,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:25,529 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:25,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:25,730 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:25,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:25,731 INFO L82 PathProgramCache]: Analyzing trace with hash 146108750, now seen corresponding path program 199 times [2020-10-15 20:01:25,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:25,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602858077] [2020-10-15 20:01:25,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:25,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602858077] [2020-10-15 20:01:25,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620087639] [2020-10-15 20:01:25,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:25,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:25,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:26,164 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:01:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:26,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:26,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:26,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958412268] [2020-10-15 20:01:26,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:26,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:26,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:26,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:26,190 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 20:01:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:26,925 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-10-15 20:01:26,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:01:26,927 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:26,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:26,928 INFO L225 Difference]: With dead ends: 229 [2020-10-15 20:01:26,928 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 20:01:26,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:01:26,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 20:01:26,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-10-15 20:01:26,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 20:01:26,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-10-15 20:01:26,932 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-10-15 20:01:26,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:26,932 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-10-15 20:01:26,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:26,932 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-10-15 20:01:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:26,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:26,932 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:27,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-15 20:01:27,133 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:27,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:27,134 INFO L82 PathProgramCache]: Analyzing trace with hash 2034084541, now seen corresponding path program 200 times [2020-10-15 20:01:27,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:27,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245317773] [2020-10-15 20:01:27,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:27,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245317773] [2020-10-15 20:01:27,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369615816] [2020-10-15 20:01:27,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:27,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:01:27,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:27,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:27,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:27,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:27,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:27,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841716731] [2020-10-15 20:01:27,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:27,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:27,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:27,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:27,608 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-10-15 20:01:28,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:28,138 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-15 20:01:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:01:28,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:28,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:28,140 INFO L225 Difference]: With dead ends: 229 [2020-10-15 20:01:28,140 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 20:01:28,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:01:28,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 20:01:28,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-15 20:01:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 20:01:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-15 20:01:28,144 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-15 20:01:28,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:28,144 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-15 20:01:28,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:28,144 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-15 20:01:28,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:28,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:28,145 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:28,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-15 20:01:28,345 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:28,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:28,346 INFO L82 PathProgramCache]: Analyzing trace with hash 2034085502, now seen corresponding path program 201 times [2020-10-15 20:01:28,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:28,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634032200] [2020-10-15 20:01:28,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:28,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634032200] [2020-10-15 20:01:28,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142317017] [2020-10-15 20:01:28,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:28,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:01:28,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:28,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:28,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:28,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:28,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:28,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454140994] [2020-10-15 20:01:28,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:28,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:28,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:28,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:28,878 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-15 20:01:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:29,499 INFO L93 Difference]: Finished difference Result 237 states and 545 transitions. [2020-10-15 20:01:29,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:01:29,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:29,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:29,502 INFO L225 Difference]: With dead ends: 237 [2020-10-15 20:01:29,502 INFO L226 Difference]: Without dead ends: 235 [2020-10-15 20:01:29,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:01:29,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-15 20:01:29,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2020-10-15 20:01:29,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 20:01:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-10-15 20:01:29,506 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-10-15 20:01:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:29,506 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-10-15 20:01:29,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:29,506 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-10-15 20:01:29,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:29,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:29,507 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:29,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-15 20:01:29,709 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:29,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:29,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2034114332, now seen corresponding path program 202 times [2020-10-15 20:01:29,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:29,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042695824] [2020-10-15 20:01:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:29,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042695824] [2020-10-15 20:01:29,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500407407] [2020-10-15 20:01:29,871 INFO L93 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:29,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:01:29,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:29,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:29,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:32,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:32,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:32,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869024856] [2020-10-15 20:01:32,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:32,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:32,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:32,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:32,092 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-10-15 20:01:33,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:33,134 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-15 20:01:33,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:01:33,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:33,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:33,137 INFO L225 Difference]: With dead ends: 246 [2020-10-15 20:01:33,138 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 20:01:33,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:01:33,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 20:01:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2020-10-15 20:01:33,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:01:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-10-15 20:01:33,141 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-10-15 20:01:33,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:33,141 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-10-15 20:01:33,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:33,141 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-10-15 20:01:33,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:33,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:33,142 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:33,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-15 20:01:33,343 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:33,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:33,343 INFO L82 PathProgramCache]: Analyzing trace with hash 2035009023, now seen corresponding path program 203 times [2020-10-15 20:01:33,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:33,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971624628] [2020-10-15 20:01:33,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:33,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971624628] [2020-10-15 20:01:33,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96318597] [2020-10-15 20:01:33,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:33,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:01:33,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:33,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:33,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:33,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:33,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:33,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653531630] [2020-10-15 20:01:33,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:33,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:33,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:33,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:33,869 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-10-15 20:01:34,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:34,499 INFO L93 Difference]: Finished difference Result 245 states and 560 transitions. [2020-10-15 20:01:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:01:34,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:34,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:34,503 INFO L225 Difference]: With dead ends: 245 [2020-10-15 20:01:34,503 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 20:01:34,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:01:34,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 20:01:34,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2020-10-15 20:01:34,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 20:01:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-10-15 20:01:34,507 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-10-15 20:01:34,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:34,507 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-10-15 20:01:34,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:34,507 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-10-15 20:01:34,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:34,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:34,508 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:34,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-15 20:01:34,709 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:34,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:34,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2062713692, now seen corresponding path program 204 times [2020-10-15 20:01:34,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:34,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955041947] [2020-10-15 20:01:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:34,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955041947] [2020-10-15 20:01:34,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437545355] [2020-10-15 20:01:34,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:34,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:01:34,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:34,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:34,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:35,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:35,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:35,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215469508] [2020-10-15 20:01:35,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:35,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:35,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:35,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:35,281 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-10-15 20:01:35,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:35,871 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2020-10-15 20:01:35,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:01:35,873 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:35,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:35,874 INFO L225 Difference]: With dead ends: 239 [2020-10-15 20:01:35,874 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 20:01:35,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:01:35,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 20:01:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2020-10-15 20:01:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 20:01:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-10-15 20:01:35,877 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-10-15 20:01:35,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:35,877 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-10-15 20:01:35,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:35,878 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-10-15 20:01:35,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:35,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:35,878 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:36,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-10-15 20:01:36,079 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:36,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:36,079 INFO L82 PathProgramCache]: Analyzing trace with hash 2063667004, now seen corresponding path program 205 times [2020-10-15 20:01:36,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:36,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722044310] [2020-10-15 20:01:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:36,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722044310] [2020-10-15 20:01:36,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421398478] [2020-10-15 20:01:36,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:36,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:36,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:36,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:36,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:36,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218130929] [2020-10-15 20:01:36,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:36,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:36,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:36,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:36,674 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-10-15 20:01:37,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:37,131 INFO L93 Difference]: Finished difference Result 220 states and 508 transitions. [2020-10-15 20:01:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:01:37,133 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:37,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:37,134 INFO L225 Difference]: With dead ends: 220 [2020-10-15 20:01:37,134 INFO L226 Difference]: Without dead ends: 218 [2020-10-15 20:01:37,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:01:37,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-15 20:01:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2020-10-15 20:01:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 20:01:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-10-15 20:01:37,137 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-10-15 20:01:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:37,137 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-10-15 20:01:37,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-10-15 20:01:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:37,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:37,138 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:37,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-15 20:01:37,339 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:37,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:37,339 INFO L82 PathProgramCache]: Analyzing trace with hash 313362251, now seen corresponding path program 206 times [2020-10-15 20:01:37,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:37,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433428064] [2020-10-15 20:01:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:37,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433428064] [2020-10-15 20:01:37,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571663905] [2020-10-15 20:01:37,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:37,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:01:37,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:37,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:37,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:37,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:37,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:37,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621946858] [2020-10-15 20:01:37,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:37,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:37,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:37,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:37,867 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-10-15 20:01:38,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:38,405 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-15 20:01:38,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:01:38,406 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:38,407 INFO L225 Difference]: With dead ends: 229 [2020-10-15 20:01:38,407 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 20:01:38,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:01:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 20:01:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-15 20:01:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 20:01:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-10-15 20:01:38,411 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-10-15 20:01:38,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:38,411 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-10-15 20:01:38,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:38,411 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-10-15 20:01:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:38,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:38,411 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:38,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-10-15 20:01:38,615 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:38,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:38,615 INFO L82 PathProgramCache]: Analyzing trace with hash 313363212, now seen corresponding path program 207 times [2020-10-15 20:01:38,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:38,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102542534] [2020-10-15 20:01:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:38,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102542534] [2020-10-15 20:01:38,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511910770] [2020-10-15 20:01:38,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:38,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:01:38,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:38,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:38,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:39,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:39,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:39,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459695915] [2020-10-15 20:01:39,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:39,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:39,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:39,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:39,183 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-10-15 20:01:39,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:39,829 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2020-10-15 20:01:39,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:01:39,830 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:39,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:39,831 INFO L225 Difference]: With dead ends: 233 [2020-10-15 20:01:39,831 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 20:01:39,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:01:39,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 20:01:39,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-10-15 20:01:39,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 20:01:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-10-15 20:01:39,834 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-10-15 20:01:39,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:39,834 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-10-15 20:01:39,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:39,834 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-10-15 20:01:39,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:39,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:39,835 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:40,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:40,036 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:40,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:40,036 INFO L82 PathProgramCache]: Analyzing trace with hash 313392042, now seen corresponding path program 208 times [2020-10-15 20:01:40,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:40,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864169605] [2020-10-15 20:01:40,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:40,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864169605] [2020-10-15 20:01:40,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581782205] [2020-10-15 20:01:40,199 INFO L93 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:40,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:01:40,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:40,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:40,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:42,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:42,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:42,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725606233] [2020-10-15 20:01:42,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:42,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:42,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:42,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:42,156 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-10-15 20:01:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:43,235 INFO L93 Difference]: Finished difference Result 256 states and 582 transitions. [2020-10-15 20:01:43,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:01:43,237 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:43,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:43,238 INFO L225 Difference]: With dead ends: 256 [2020-10-15 20:01:43,238 INFO L226 Difference]: Without dead ends: 254 [2020-10-15 20:01:43,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:01:43,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-15 20:01:43,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2020-10-15 20:01:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 20:01:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-10-15 20:01:43,242 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-10-15 20:01:43,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:43,242 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-10-15 20:01:43,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-10-15 20:01:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:43,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:43,243 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:43,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:43,443 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:43,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:43,444 INFO L82 PathProgramCache]: Analyzing trace with hash 314286733, now seen corresponding path program 209 times [2020-10-15 20:01:43,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:43,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263553207] [2020-10-15 20:01:43,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:43,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263553207] [2020-10-15 20:01:43,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832921688] [2020-10-15 20:01:43,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:43,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:01:43,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:43,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:43,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:43,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:43,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:43,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894009521] [2020-10-15 20:01:43,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:43,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:43,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:43,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:43,950 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-10-15 20:01:44,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:44,669 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-15 20:01:44,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:01:44,672 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:44,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:44,673 INFO L225 Difference]: With dead ends: 246 [2020-10-15 20:01:44,673 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 20:01:44,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:01:44,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 20:01:44,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-10-15 20:01:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 20:01:44,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-10-15 20:01:44,676 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-10-15 20:01:44,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:44,676 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-10-15 20:01:44,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:44,676 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-10-15 20:01:44,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:44,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:44,677 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:44,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:44,878 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:44,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:44,878 INFO L82 PathProgramCache]: Analyzing trace with hash 950591741, now seen corresponding path program 210 times [2020-10-15 20:01:44,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:44,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893365048] [2020-10-15 20:01:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:45,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893365048] [2020-10-15 20:01:45,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816186232] [2020-10-15 20:01:45,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:45,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:01:45,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:45,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:45,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:45,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:45,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:45,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263911274] [2020-10-15 20:01:45,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:45,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:45,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:45,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:45,399 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-10-15 20:01:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:46,137 INFO L93 Difference]: Finished difference Result 250 states and 575 transitions. [2020-10-15 20:01:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:01:46,138 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:46,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:46,139 INFO L225 Difference]: With dead ends: 250 [2020-10-15 20:01:46,139 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 20:01:46,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:01:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 20:01:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2020-10-15 20:01:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:01:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-15 20:01:46,142 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-15 20:01:46,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:46,142 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-15 20:01:46,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-15 20:01:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:46,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:46,142 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:46,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-15 20:01:46,343 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:46,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:46,344 INFO L82 PathProgramCache]: Analyzing trace with hash 950592702, now seen corresponding path program 211 times [2020-10-15 20:01:46,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:46,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139464045] [2020-10-15 20:01:46,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:46,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139464045] [2020-10-15 20:01:46,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606632706] [2020-10-15 20:01:46,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:46,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:46,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:46,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:46,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:46,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007306410] [2020-10-15 20:01:46,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:46,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:46,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:46,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:46,858 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-15 20:01:47,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:47,522 INFO L93 Difference]: Finished difference Result 245 states and 564 transitions. [2020-10-15 20:01:47,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:01:47,523 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:47,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:47,524 INFO L225 Difference]: With dead ends: 245 [2020-10-15 20:01:47,524 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 20:01:47,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:01:47,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 20:01:47,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2020-10-15 20:01:47,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:01:47,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-15 20:01:47,528 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-15 20:01:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:47,528 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-15 20:01:47,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:47,529 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-15 20:01:47,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:47,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:47,529 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:47,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:47,730 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:47,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:47,730 INFO L82 PathProgramCache]: Analyzing trace with hash 950621532, now seen corresponding path program 212 times [2020-10-15 20:01:47,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:47,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567909199] [2020-10-15 20:01:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:47,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567909199] [2020-10-15 20:01:47,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261543201] [2020-10-15 20:01:47,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:47,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:01:47,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:47,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:47,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:48,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:48,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:48,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122093015] [2020-10-15 20:01:48,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:48,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:48,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:48,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:48,284 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-15 20:01:49,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:49,475 INFO L93 Difference]: Finished difference Result 262 states and 602 transitions. [2020-10-15 20:01:49,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:01:49,477 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:49,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:49,477 INFO L225 Difference]: With dead ends: 262 [2020-10-15 20:01:49,477 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 20:01:49,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:01:49,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 20:01:49,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 165. [2020-10-15 20:01:49,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 20:01:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-15 20:01:49,481 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-15 20:01:49,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:49,481 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-15 20:01:49,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:49,482 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-15 20:01:49,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:49,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:49,482 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:49,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-15 20:01:49,683 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:49,683 INFO L82 PathProgramCache]: Analyzing trace with hash 971147531, now seen corresponding path program 213 times [2020-10-15 20:01:49,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:49,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638460706] [2020-10-15 20:01:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:49,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638460706] [2020-10-15 20:01:49,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432613536] [2020-10-15 20:01:49,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:49,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:01:49,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:49,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:49,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:50,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:50,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:50,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369983071] [2020-10-15 20:01:50,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:50,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:50,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:50,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:50,264 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-15 20:01:51,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:51,286 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2020-10-15 20:01:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:01:51,288 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:51,288 INFO L225 Difference]: With dead ends: 254 [2020-10-15 20:01:51,288 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 20:01:51,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:01:51,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 20:01:51,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2020-10-15 20:01:51,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:01:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-10-15 20:01:51,292 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-10-15 20:01:51,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:51,292 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-10-15 20:01:51,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:51,292 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-10-15 20:01:51,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:51,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:51,293 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:51,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-15 20:01:51,493 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:51,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:51,494 INFO L82 PathProgramCache]: Analyzing trace with hash 971148492, now seen corresponding path program 214 times [2020-10-15 20:01:51,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:51,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853293108] [2020-10-15 20:01:51,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:51,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853293108] [2020-10-15 20:01:51,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579931807] [2020-10-15 20:01:51,657 INFO L93 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:51,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:01:51,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:51,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:51,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:51,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:51,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:51,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610769464] [2020-10-15 20:01:51,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:51,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:51,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:51,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:51,981 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-10-15 20:01:52,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:52,898 INFO L93 Difference]: Finished difference Result 248 states and 576 transitions. [2020-10-15 20:01:52,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:01:52,900 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:52,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:52,901 INFO L225 Difference]: With dead ends: 248 [2020-10-15 20:01:52,901 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 20:01:52,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:01:52,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 20:01:52,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 167. [2020-10-15 20:01:52,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:01:52,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 20:01:52,905 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 20:01:52,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:52,905 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 20:01:52,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:52,905 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 20:01:52,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:52,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:52,906 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:53,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:53,107 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:53,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:53,107 INFO L82 PathProgramCache]: Analyzing trace with hash 971810621, now seen corresponding path program 215 times [2020-10-15 20:01:53,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:53,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598018925] [2020-10-15 20:01:53,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:53,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598018925] [2020-10-15 20:01:53,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879264180] [2020-10-15 20:01:53,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:53,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:01:53,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:53,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:53,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:53,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:53,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:53,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369028126] [2020-10-15 20:01:53,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:53,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:53,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:53,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:53,612 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 20:01:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:54,649 INFO L93 Difference]: Finished difference Result 245 states and 579 transitions. [2020-10-15 20:01:54,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:01:54,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:54,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:54,651 INFO L225 Difference]: With dead ends: 245 [2020-10-15 20:01:54,651 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 20:01:54,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:01:54,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 20:01:54,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2020-10-15 20:01:54,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:01:54,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 20:01:54,661 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 20:01:54,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:54,661 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 20:01:54,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 20:01:54,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:54,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:54,662 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:54,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:54,864 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:54,864 INFO L82 PathProgramCache]: Analyzing trace with hash 971831980, now seen corresponding path program 216 times [2020-10-15 20:01:54,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:54,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978066050] [2020-10-15 20:01:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:55,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978066050] [2020-10-15 20:01:55,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628502224] [2020-10-15 20:01:55,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:55,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:01:55,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:55,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:55,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:55,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:01:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:55,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:55,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:55,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50703851] [2020-10-15 20:01:55,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:55,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:55,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:55,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:55,364 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 20:01:56,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:56,113 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-10-15 20:01:56,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:01:56,116 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:56,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:56,116 INFO L225 Difference]: With dead ends: 223 [2020-10-15 20:01:56,116 INFO L226 Difference]: Without dead ends: 218 [2020-10-15 20:01:56,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:01:56,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-15 20:01:56,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-10-15 20:01:56,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:01:56,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 20:01:56,119 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 20:01:56,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:56,119 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 20:01:56,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:56,120 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 20:01:56,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:56,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:56,120 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:56,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-10-15 20:01:56,321 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:56,321 INFO L82 PathProgramCache]: Analyzing trace with hash 971832941, now seen corresponding path program 217 times [2020-10-15 20:01:56,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:56,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094360838] [2020-10-15 20:01:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:56,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094360838] [2020-10-15 20:01:56,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596269324] [2020-10-15 20:01:56,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:56,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:56,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:56,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:01:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:56,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:56,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:56,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706946834] [2020-10-15 20:01:56,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:56,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:56,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:56,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:56,946 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 20:01:58,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:58,688 INFO L93 Difference]: Finished difference Result 286 states and 679 transitions. [2020-10-15 20:01:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:01:58,691 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:58,692 INFO L225 Difference]: With dead ends: 286 [2020-10-15 20:01:58,692 INFO L226 Difference]: Without dead ends: 281 [2020-10-15 20:01:58,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:01:58,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-15 20:01:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2020-10-15 20:01:58,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:01:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 20:01:58,696 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 20:01:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:58,696 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 20:01:58,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 20:01:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:58,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:58,697 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:58,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:58,898 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:58,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:58,898 INFO L82 PathProgramCache]: Analyzing trace with hash 971840412, now seen corresponding path program 218 times [2020-10-15 20:01:58,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:58,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725580393] [2020-10-15 20:01:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:59,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725580393] [2020-10-15 20:01:59,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566150359] [2020-10-15 20:01:59,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:59,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:01:59,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:59,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:59,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:59,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:59,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:59,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758674834] [2020-10-15 20:01:59,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:59,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:59,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:59,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:59,523 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 20:02:00,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:00,816 INFO L93 Difference]: Finished difference Result 268 states and 630 transitions. [2020-10-15 20:02:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:02:00,819 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:00,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:00,820 INFO L225 Difference]: With dead ends: 268 [2020-10-15 20:02:00,820 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 20:02:00,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:02:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 20:02:00,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 169. [2020-10-15 20:02:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:02:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 20:02:00,823 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 20:02:00,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:00,824 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 20:02:00,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:00,824 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 20:02:00,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:00,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:00,824 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:01,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-10-15 20:02:01,025 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:01,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:01,026 INFO L82 PathProgramCache]: Analyzing trace with hash 971861771, now seen corresponding path program 219 times [2020-10-15 20:02:01,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:01,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913628315] [2020-10-15 20:02:01,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:01,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913628315] [2020-10-15 20:02:01,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570025935] [2020-10-15 20:02:01,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:01,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:02:01,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:01,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:01,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:01,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:02:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:01,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:01,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:01,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588722196] [2020-10-15 20:02:01,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:01,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:01,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:01,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:01,611 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 20:02:03,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:03,332 INFO L93 Difference]: Finished difference Result 296 states and 707 transitions. [2020-10-15 20:02:03,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:02:03,334 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:03,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:03,335 INFO L225 Difference]: With dead ends: 296 [2020-10-15 20:02:03,335 INFO L226 Difference]: Without dead ends: 291 [2020-10-15 20:02:03,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:02:03,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-15 20:02:03,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2020-10-15 20:02:03,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:02:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 20:02:03,344 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 20:02:03,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:03,344 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 20:02:03,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:03,344 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 20:02:03,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:03,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:03,345 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:03,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:03,545 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:03,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:03,546 INFO L82 PathProgramCache]: Analyzing trace with hash 971862732, now seen corresponding path program 220 times [2020-10-15 20:02:03,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:03,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597677725] [2020-10-15 20:02:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:03,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597677725] [2020-10-15 20:02:03,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059611494] [2020-10-15 20:02:03,716 INFO L93 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:03,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:02:03,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:03,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:03,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:04,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:02:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:04,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:04,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:04,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569793900] [2020-10-15 20:02:04,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:04,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:04,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:04,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:04,064 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 20:02:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:05,643 INFO L93 Difference]: Finished difference Result 299 states and 710 transitions. [2020-10-15 20:02:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:02:05,646 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:05,647 INFO L225 Difference]: With dead ends: 299 [2020-10-15 20:02:05,647 INFO L226 Difference]: Without dead ends: 294 [2020-10-15 20:02:05,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:02:05,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-15 20:02:05,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 165. [2020-10-15 20:02:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 20:02:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-15 20:02:05,652 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-15 20:02:05,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:05,652 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-15 20:02:05,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:05,652 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-15 20:02:05,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:05,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:05,652 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:05,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:05,853 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:05,854 INFO L82 PathProgramCache]: Analyzing trace with hash 972071052, now seen corresponding path program 221 times [2020-10-15 20:02:05,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:05,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119209317] [2020-10-15 20:02:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:06,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119209317] [2020-10-15 20:02:06,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608941629] [2020-10-15 20:02:06,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:06,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:02:06,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:06,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:06,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:06,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:06,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:06,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107776532] [2020-10-15 20:02:06,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:06,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:06,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:06,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:06,529 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-15 20:02:08,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:08,178 INFO L93 Difference]: Finished difference Result 274 states and 633 transitions. [2020-10-15 20:02:08,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:02:08,182 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:08,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:08,183 INFO L225 Difference]: With dead ends: 274 [2020-10-15 20:02:08,183 INFO L226 Difference]: Without dead ends: 272 [2020-10-15 20:02:08,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:02:08,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-15 20:02:08,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-10-15 20:02:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:02:08,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 20:02:08,188 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 20:02:08,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:08,188 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 20:02:08,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:08,189 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 20:02:08,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:08,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:08,189 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:08,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:08,400 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:08,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:08,401 INFO L82 PathProgramCache]: Analyzing trace with hash 972734142, now seen corresponding path program 222 times [2020-10-15 20:02:08,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:08,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042806755] [2020-10-15 20:02:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:08,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042806755] [2020-10-15 20:02:08,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110078144] [2020-10-15 20:02:08,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:08,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:02:08,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:08,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:08,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:09,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:09,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:09,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780561567] [2020-10-15 20:02:09,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:09,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:09,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:09,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:09,151 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 20:02:10,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:10,871 INFO L93 Difference]: Finished difference Result 282 states and 670 transitions. [2020-10-15 20:02:10,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:02:10,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:10,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:10,876 INFO L225 Difference]: With dead ends: 282 [2020-10-15 20:02:10,876 INFO L226 Difference]: Without dead ends: 280 [2020-10-15 20:02:10,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:02:10,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-15 20:02:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 174. [2020-10-15 20:02:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-15 20:02:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-10-15 20:02:10,880 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-10-15 20:02:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:10,880 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-10-15 20:02:10,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-10-15 20:02:10,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:10,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:10,882 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:11,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-15 20:02:11,086 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:11,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:11,087 INFO L82 PathProgramCache]: Analyzing trace with hash 972755501, now seen corresponding path program 223 times [2020-10-15 20:02:11,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:11,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126732241] [2020-10-15 20:02:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:11,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126732241] [2020-10-15 20:02:11,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512850291] [2020-10-15 20:02:11,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:11,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:11,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:11,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:02:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:11,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:11,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:11,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247922826] [2020-10-15 20:02:11,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:11,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:11,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:11,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:11,776 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-10-15 20:02:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:14,125 INFO L93 Difference]: Finished difference Result 321 states and 773 transitions. [2020-10-15 20:02:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:02:14,128 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:14,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:14,128 INFO L225 Difference]: With dead ends: 321 [2020-10-15 20:02:14,129 INFO L226 Difference]: Without dead ends: 313 [2020-10-15 20:02:14,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:02:14,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-15 20:02:14,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 176. [2020-10-15 20:02:14,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-15 20:02:14,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-10-15 20:02:14,132 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-10-15 20:02:14,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:14,132 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-10-15 20:02:14,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-10-15 20:02:14,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:14,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:14,133 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:14,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-15 20:02:14,334 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:14,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:14,335 INFO L82 PathProgramCache]: Analyzing trace with hash 972756462, now seen corresponding path program 224 times [2020-10-15 20:02:14,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:14,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522544740] [2020-10-15 20:02:14,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:14,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522544740] [2020-10-15 20:02:14,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545273572] [2020-10-15 20:02:14,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:14,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:02:14,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:14,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:14,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:19,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:02:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:19,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:19,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:19,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370610035] [2020-10-15 20:02:19,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:19,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:19,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:19,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-10-15 20:02:19,142 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-10-15 20:02:24,035 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-15 20:02:28,238 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 20:02:32,642 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-15 20:02:36,976 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-15 20:02:39,098 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 20:02:43,968 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-15 20:02:45,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:45,381 INFO L93 Difference]: Finished difference Result 323 states and 782 transitions. [2020-10-15 20:02:45,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:02:45,385 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:45,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:45,386 INFO L225 Difference]: With dead ends: 323 [2020-10-15 20:02:45,386 INFO L226 Difference]: Without dead ends: 315 [2020-10-15 20:02:45,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=530, Invalid=1274, Unknown=2, NotChecked=0, Total=1806 [2020-10-15 20:02:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-15 20:02:45,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 171. [2020-10-15 20:02:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 20:02:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-15 20:02:45,390 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-15 20:02:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:45,390 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-15 20:02:45,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:45,391 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-15 20:02:45,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:45,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:45,391 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:45,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-10-15 20:02:45,592 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:45,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:45,592 INFO L82 PathProgramCache]: Analyzing trace with hash 972785292, now seen corresponding path program 225 times [2020-10-15 20:02:45,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:45,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456891773] [2020-10-15 20:02:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:45,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456891773] [2020-10-15 20:02:45,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409005616] [2020-10-15 20:02:45,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:45,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:02:45,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:45,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:45,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:46,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:02:46,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:02:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:46,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:46,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:46,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061931195] [2020-10-15 20:02:46,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:46,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:46,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:46,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:46,417 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-15 20:02:49,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:49,691 INFO L93 Difference]: Finished difference Result 320 states and 767 transitions. [2020-10-15 20:02:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:02:49,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:49,696 INFO L225 Difference]: With dead ends: 320 [2020-10-15 20:02:49,696 INFO L226 Difference]: Without dead ends: 312 [2020-10-15 20:02:49,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:02:49,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-15 20:02:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 170. [2020-10-15 20:02:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-15 20:02:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 431 transitions. [2020-10-15 20:02:49,700 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 431 transitions. Word has length 14 [2020-10-15 20:02:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:49,700 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 431 transitions. [2020-10-15 20:02:49,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 431 transitions. [2020-10-15 20:02:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:49,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:49,700 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:49,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-15 20:02:49,905 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:49,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:49,906 INFO L82 PathProgramCache]: Analyzing trace with hash 979221853, now seen corresponding path program 226 times [2020-10-15 20:02:49,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:49,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870316293] [2020-10-15 20:02:49,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:50,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870316293] [2020-10-15 20:02:50,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468733364] [2020-10-15 20:02:50,160 INFO L93 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:50,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:02:50,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:50,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:50,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:50,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:50,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:50,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746812299] [2020-10-15 20:02:50,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:50,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:50,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:50,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:50,619 INFO L87 Difference]: Start difference. First operand 170 states and 431 transitions. Second operand 17 states. [2020-10-15 20:02:51,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:51,875 INFO L93 Difference]: Finished difference Result 256 states and 599 transitions. [2020-10-15 20:02:51,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:02:51,879 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:51,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:51,879 INFO L225 Difference]: With dead ends: 256 [2020-10-15 20:02:51,880 INFO L226 Difference]: Without dead ends: 254 [2020-10-15 20:02:51,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:02:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-15 20:02:51,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 168. [2020-10-15 20:02:51,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-15 20:02:51,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 425 transitions. [2020-10-15 20:02:51,883 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 425 transitions. Word has length 14 [2020-10-15 20:02:51,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:51,883 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 425 transitions. [2020-10-15 20:02:51,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:51,883 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 425 transitions. [2020-10-15 20:02:51,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:51,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:51,883 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:52,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2020-10-15 20:02:52,084 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:52,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:52,085 INFO L82 PathProgramCache]: Analyzing trace with hash 999776682, now seen corresponding path program 227 times [2020-10-15 20:02:52,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:52,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194625379] [2020-10-15 20:02:52,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:52,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194625379] [2020-10-15 20:02:52,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986780436] [2020-10-15 20:02:52,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:52,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:02:52,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:52,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:52,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:52,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:52,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:52,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142645471] [2020-10-15 20:02:52,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:52,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:52,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:52,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:52,809 INFO L87 Difference]: Start difference. First operand 168 states and 425 transitions. Second operand 17 states. [2020-10-15 20:02:54,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:54,838 INFO L93 Difference]: Finished difference Result 294 states and 688 transitions. [2020-10-15 20:02:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:02:54,842 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:54,843 INFO L225 Difference]: With dead ends: 294 [2020-10-15 20:02:54,843 INFO L226 Difference]: Without dead ends: 292 [2020-10-15 20:02:54,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:02:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-15 20:02:54,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 166. [2020-10-15 20:02:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:02:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 423 transitions. [2020-10-15 20:02:54,848 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 423 transitions. Word has length 14 [2020-10-15 20:02:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:54,848 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 423 transitions. [2020-10-15 20:02:54,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 423 transitions. [2020-10-15 20:02:54,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:54,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:54,849 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:55,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:55,049 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:55,050 INFO L82 PathProgramCache]: Analyzing trace with hash 999777643, now seen corresponding path program 228 times [2020-10-15 20:02:55,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:55,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492440167] [2020-10-15 20:02:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:55,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492440167] [2020-10-15 20:02:55,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379483309] [2020-10-15 20:02:55,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:55,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:02:55,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:55,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:55,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:55,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:55,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:55,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584151620] [2020-10-15 20:02:55,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:55,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:55,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:55,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:55,903 INFO L87 Difference]: Start difference. First operand 166 states and 423 transitions. Second operand 17 states. [2020-10-15 20:02:57,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:57,502 INFO L93 Difference]: Finished difference Result 266 states and 625 transitions. [2020-10-15 20:02:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:02:57,506 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:57,507 INFO L225 Difference]: With dead ends: 266 [2020-10-15 20:02:57,507 INFO L226 Difference]: Without dead ends: 264 [2020-10-15 20:02:57,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=316, Invalid=806, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:02:57,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-15 20:02:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 164. [2020-10-15 20:02:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:02:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-10-15 20:02:57,510 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-10-15 20:02:57,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:57,510 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-10-15 20:02:57,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:57,510 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-10-15 20:02:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:57,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:57,511 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:57,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:57,712 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:57,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:57,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1000439772, now seen corresponding path program 229 times [2020-10-15 20:02:57,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:57,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109548808] [2020-10-15 20:02:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:57,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109548808] [2020-10-15 20:02:57,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344941431] [2020-10-15 20:02:57,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:58,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:58,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:58,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:58,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:58,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977164065] [2020-10-15 20:02:58,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:58,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:58,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:58,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:58,443 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-10-15 20:03:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:00,583 INFO L93 Difference]: Finished difference Result 275 states and 656 transitions. [2020-10-15 20:03:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:03:00,587 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:00,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:00,587 INFO L225 Difference]: With dead ends: 275 [2020-10-15 20:03:00,587 INFO L226 Difference]: Without dead ends: 273 [2020-10-15 20:03:00,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:03:00,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-15 20:03:00,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 166. [2020-10-15 20:03:00,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:03:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-15 20:03:00,591 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-15 20:03:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:00,591 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-15 20:03:00,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-15 20:03:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:00,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:00,592 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:00,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:00,798 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:00,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:00,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1000461131, now seen corresponding path program 230 times [2020-10-15 20:03:00,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:00,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695908151] [2020-10-15 20:03:00,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:01,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695908151] [2020-10-15 20:03:01,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599462619] [2020-10-15 20:03:01,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:01,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:03:01,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:01,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:01,446 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:03:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:01,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:01,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:01,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72700217] [2020-10-15 20:03:01,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:01,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:01,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:01,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:01,480 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-15 20:03:03,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:03,531 INFO L93 Difference]: Finished difference Result 285 states and 690 transitions. [2020-10-15 20:03:03,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:03:03,535 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:03,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:03,536 INFO L225 Difference]: With dead ends: 285 [2020-10-15 20:03:03,536 INFO L226 Difference]: Without dead ends: 277 [2020-10-15 20:03:03,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:03:03,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-15 20:03:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 166. [2020-10-15 20:03:03,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:03:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-15 20:03:03,540 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-15 20:03:03,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:03,540 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-15 20:03:03,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-15 20:03:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:03,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:03,541 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:03,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2020-10-15 20:03:03,745 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:03,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:03,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1000462092, now seen corresponding path program 231 times [2020-10-15 20:03:03,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:03,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780161810] [2020-10-15 20:03:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:04,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:04,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780161810] [2020-10-15 20:03:04,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397324437] [2020-10-15 20:03:04,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:04,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:03:04,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:04,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:04,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:04,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:03:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:04,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:04,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:04,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339053060] [2020-10-15 20:03:04,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:04,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:04,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:04,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:04,599 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-15 20:03:07,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:07,146 INFO L93 Difference]: Finished difference Result 307 states and 744 transitions. [2020-10-15 20:03:07,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:03:07,150 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:07,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:07,151 INFO L225 Difference]: With dead ends: 307 [2020-10-15 20:03:07,151 INFO L226 Difference]: Without dead ends: 299 [2020-10-15 20:03:07,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:03:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-15 20:03:07,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 164. [2020-10-15 20:03:07,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:03:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-10-15 20:03:07,154 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-10-15 20:03:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:07,155 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-10-15 20:03:07,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-10-15 20:03:07,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:07,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:07,155 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:07,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:07,356 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:07,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1000469563, now seen corresponding path program 232 times [2020-10-15 20:03:07,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:07,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768266232] [2020-10-15 20:03:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:07,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768266232] [2020-10-15 20:03:07,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386897163] [2020-10-15 20:03:07,633 INFO L93 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:07,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:03:07,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:07,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:07,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:08,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:08,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:08,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089793720] [2020-10-15 20:03:08,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:08,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:08,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:08,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:08,106 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-10-15 20:03:10,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:10,014 INFO L93 Difference]: Finished difference Result 280 states and 668 transitions. [2020-10-15 20:03:10,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:03:10,018 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:10,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:10,019 INFO L225 Difference]: With dead ends: 280 [2020-10-15 20:03:10,019 INFO L226 Difference]: Without dead ends: 278 [2020-10-15 20:03:10,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:03:10,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-15 20:03:10,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 166. [2020-10-15 20:03:10,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:03:10,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-15 20:03:10,023 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-15 20:03:10,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:10,024 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-15 20:03:10,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:10,024 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-15 20:03:10,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:10,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:10,024 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:10,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-10-15 20:03:10,227 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:10,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:10,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1000490922, now seen corresponding path program 233 times [2020-10-15 20:03:10,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:10,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960958765] [2020-10-15 20:03:10,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:10,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960958765] [2020-10-15 20:03:10,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112628549] [2020-10-15 20:03:10,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:10,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:03:10,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:10,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:10,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:10,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:03:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:10,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:10,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:10,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250117587] [2020-10-15 20:03:10,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:10,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:10,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:10,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:10,974 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-15 20:03:13,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:13,195 INFO L93 Difference]: Finished difference Result 315 states and 764 transitions. [2020-10-15 20:03:13,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:03:13,198 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:13,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:13,199 INFO L225 Difference]: With dead ends: 315 [2020-10-15 20:03:13,199 INFO L226 Difference]: Without dead ends: 307 [2020-10-15 20:03:13,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:03:13,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-15 20:03:13,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 164. [2020-10-15 20:03:13,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:03:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 414 transitions. [2020-10-15 20:03:13,203 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 414 transitions. Word has length 14 [2020-10-15 20:03:13,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:13,203 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 414 transitions. [2020-10-15 20:03:13,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:13,203 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 414 transitions. [2020-10-15 20:03:13,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:13,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:13,203 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:13,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:13,404 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:13,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:13,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1000491883, now seen corresponding path program 234 times [2020-10-15 20:03:13,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:13,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027634123] [2020-10-15 20:03:13,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:13,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027634123] [2020-10-15 20:03:13,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542224590] [2020-10-15 20:03:13,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:13,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:03:13,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:13,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:13,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:14,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:03:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:14,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:14,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:14,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644179549] [2020-10-15 20:03:14,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:14,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:14,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:14,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:14,123 INFO L87 Difference]: Start difference. First operand 164 states and 414 transitions. Second operand 17 states. [2020-10-15 20:03:16,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:16,610 INFO L93 Difference]: Finished difference Result 312 states and 754 transitions. [2020-10-15 20:03:16,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:03:16,615 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:16,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:16,615 INFO L225 Difference]: With dead ends: 312 [2020-10-15 20:03:16,615 INFO L226 Difference]: Without dead ends: 304 [2020-10-15 20:03:16,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:03:16,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-15 20:03:16,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 157. [2020-10-15 20:03:16,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 20:03:16,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 391 transitions. [2020-10-15 20:03:16,619 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 391 transitions. Word has length 14 [2020-10-15 20:03:16,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:16,619 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 391 transitions. [2020-10-15 20:03:16,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:16,619 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 391 transitions. [2020-10-15 20:03:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:16,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:16,619 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:16,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-10-15 20:03:16,820 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:16,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:16,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1001384652, now seen corresponding path program 235 times [2020-10-15 20:03:16,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:16,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173248646] [2020-10-15 20:03:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:17,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173248646] [2020-10-15 20:03:17,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877196782] [2020-10-15 20:03:17,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:17,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:17,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:17,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:03:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:17,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:17,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:17,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068661484] [2020-10-15 20:03:17,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:17,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:17,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:17,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:17,583 INFO L87 Difference]: Start difference. First operand 157 states and 391 transitions. Second operand 17 states. [2020-10-15 20:03:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:20,474 INFO L93 Difference]: Finished difference Result 307 states and 730 transitions. [2020-10-15 20:03:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:03:20,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:20,480 INFO L225 Difference]: With dead ends: 307 [2020-10-15 20:03:20,480 INFO L226 Difference]: Without dead ends: 299 [2020-10-15 20:03:20,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:03:20,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-15 20:03:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 155. [2020-10-15 20:03:20,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-15 20:03:20,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 381 transitions. [2020-10-15 20:03:20,484 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 381 transitions. Word has length 14 [2020-10-15 20:03:20,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:20,484 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 381 transitions. [2020-10-15 20:03:20,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:20,484 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 381 transitions. [2020-10-15 20:03:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:20,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:20,485 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:20,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:20,686 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:20,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:20,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1866754364, now seen corresponding path program 236 times [2020-10-15 20:03:20,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:20,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102250223] [2020-10-15 20:03:20,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:20,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102250223] [2020-10-15 20:03:20,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727545847] [2020-10-15 20:03:20,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:21,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:03:21,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:21,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:21,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:21,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:21,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:21,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87140642] [2020-10-15 20:03:21,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:21,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:21,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:21,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:21,504 INFO L87 Difference]: Start difference. First operand 155 states and 381 transitions. Second operand 17 states. [2020-10-15 20:03:22,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:22,379 INFO L93 Difference]: Finished difference Result 225 states and 519 transitions. [2020-10-15 20:03:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:03:22,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:22,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:22,383 INFO L225 Difference]: With dead ends: 225 [2020-10-15 20:03:22,383 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 20:03:22,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:03:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 20:03:22,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 153. [2020-10-15 20:03:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-15 20:03:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 376 transitions. [2020-10-15 20:03:22,386 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 376 transitions. Word has length 14 [2020-10-15 20:03:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:22,386 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 376 transitions. [2020-10-15 20:03:22,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 376 transitions. [2020-10-15 20:03:22,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:22,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:22,387 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:22,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-10-15 20:03:22,588 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:22,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:22,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1888203884, now seen corresponding path program 237 times [2020-10-15 20:03:22,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:22,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786979436] [2020-10-15 20:03:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:22,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786979436] [2020-10-15 20:03:22,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629155924] [2020-10-15 20:03:22,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:22,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:03:22,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:22,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:22,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:23,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:23,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:23,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485890282] [2020-10-15 20:03:23,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:23,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:23,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:23,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:23,402 INFO L87 Difference]: Start difference. First operand 153 states and 376 transitions. Second operand 17 states. [2020-10-15 20:03:24,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:24,378 INFO L93 Difference]: Finished difference Result 223 states and 512 transitions. [2020-10-15 20:03:24,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:03:24,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:24,383 INFO L225 Difference]: With dead ends: 223 [2020-10-15 20:03:24,384 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 20:03:24,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:03:24,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 20:03:24,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 151. [2020-10-15 20:03:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-15 20:03:24,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 371 transitions. [2020-10-15 20:03:24,387 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 371 transitions. Word has length 14 [2020-10-15 20:03:24,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:24,387 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 371 transitions. [2020-10-15 20:03:24,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 371 transitions. [2020-10-15 20:03:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:24,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:24,388 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:24,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2020-10-15 20:03:24,589 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:24,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1888866974, now seen corresponding path program 238 times [2020-10-15 20:03:24,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:24,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202122146] [2020-10-15 20:03:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:24,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202122146] [2020-10-15 20:03:24,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048013650] [2020-10-15 20:03:24,863 INFO L93 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:24,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:03:24,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:24,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:24,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:25,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:25,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:25,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733345234] [2020-10-15 20:03:25,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:25,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:25,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:25,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:25,474 INFO L87 Difference]: Start difference. First operand 151 states and 371 transitions. Second operand 17 states. [2020-10-15 20:03:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:26,632 INFO L93 Difference]: Finished difference Result 221 states and 510 transitions. [2020-10-15 20:03:26,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:03:26,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:26,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:26,637 INFO L225 Difference]: With dead ends: 221 [2020-10-15 20:03:26,637 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 20:03:26,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=229, Invalid=527, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:03:26,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 20:03:26,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 152. [2020-10-15 20:03:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-15 20:03:26,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 373 transitions. [2020-10-15 20:03:26,640 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 373 transitions. Word has length 14 [2020-10-15 20:03:26,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:26,640 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 373 transitions. [2020-10-15 20:03:26,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:26,645 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 373 transitions. [2020-10-15 20:03:26,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:26,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:26,645 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:26,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:26,846 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:26,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:26,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1888889294, now seen corresponding path program 239 times [2020-10-15 20:03:26,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:26,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773568231] [2020-10-15 20:03:26,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:27,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773568231] [2020-10-15 20:03:27,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455097778] [2020-10-15 20:03:27,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:27,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:03:27,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:27,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:27,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:27,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:03:31,668 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-15 20:03:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:31,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:31,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 20:03:31,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519065433] [2020-10-15 20:03:31,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:03:31,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:31,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:03:31,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-10-15 20:03:31,672 INFO L87 Difference]: Start difference. First operand 152 states and 373 transitions. Second operand 18 states. [2020-10-15 20:03:53,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:53,511 INFO L93 Difference]: Finished difference Result 263 states and 608 transitions. [2020-10-15 20:03:53,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:03:53,520 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 20:03:53,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:53,520 INFO L225 Difference]: With dead ends: 263 [2020-10-15 20:03:53,520 INFO L226 Difference]: Without dead ends: 258 [2020-10-15 20:03:53,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=334, Invalid=720, Unknown=2, NotChecked=0, Total=1056 [2020-10-15 20:03:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-15 20:03:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 150. [2020-10-15 20:03:53,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-15 20:03:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 366 transitions. [2020-10-15 20:03:53,523 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 366 transitions. Word has length 14 [2020-10-15 20:03:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:53,523 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 366 transitions. [2020-10-15 20:03:53,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:03:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 366 transitions. [2020-10-15 20:03:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:53,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:53,524 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:53,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:53,724 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:53,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:53,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1888918124, now seen corresponding path program 240 times [2020-10-15 20:03:53,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:53,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597756948] [2020-10-15 20:03:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:53,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597756948] [2020-10-15 20:03:53,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820404500] [2020-10-15 20:03:53,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:53,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:03:53,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:53,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:53,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:54,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:03:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:54,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:54,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:54,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348001879] [2020-10-15 20:03:54,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:54,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:54,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:54,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:54,321 INFO L87 Difference]: Start difference. First operand 150 states and 366 transitions. Second operand 17 states. [2020-10-15 20:03:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:55,442 INFO L93 Difference]: Finished difference Result 225 states and 522 transitions. [2020-10-15 20:03:55,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:03:55,446 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:55,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:55,446 INFO L225 Difference]: With dead ends: 225 [2020-10-15 20:03:55,446 INFO L226 Difference]: Without dead ends: 220 [2020-10-15 20:03:55,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:03:55,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-15 20:03:55,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 146. [2020-10-15 20:03:55,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 20:03:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 342 transitions. [2020-10-15 20:03:55,449 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 342 transitions. Word has length 14 [2020-10-15 20:03:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:55,449 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 342 transitions. [2020-10-15 20:03:55,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:55,449 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 342 transitions. [2020-10-15 20:03:55,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:55,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:55,450 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:55,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:55,650 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:55,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:55,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1949255125, now seen corresponding path program 7 times [2020-10-15 20:03:55,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:55,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211948661] [2020-10-15 20:03:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:55,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211948661] [2020-10-15 20:03:55,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928434613] [2020-10-15 20:03:55,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:55,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:03:55,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:56,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 20:03:56,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-10-15 20:03:56,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455340296] [2020-10-15 20:03:56,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:03:56,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:56,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:03:56,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:03:56,182 INFO L87 Difference]: Start difference. First operand 146 states and 342 transitions. Second operand 9 states. [2020-10-15 20:03:56,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:56,262 INFO L93 Difference]: Finished difference Result 235 states and 626 transitions. [2020-10-15 20:03:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 20:03:56,266 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-15 20:03:56,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:56,267 INFO L225 Difference]: With dead ends: 235 [2020-10-15 20:03:56,267 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 20:03:56,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:03:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 20:03:56,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2020-10-15 20:03:56,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-15 20:03:56,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 611 transitions. [2020-10-15 20:03:56,271 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 611 transitions. Word has length 14 [2020-10-15 20:03:56,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:56,271 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 611 transitions. [2020-10-15 20:03:56,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:03:56,271 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 611 transitions. [2020-10-15 20:03:56,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:56,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:56,271 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:56,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:56,472 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:56,473 INFO L82 PathProgramCache]: Analyzing trace with hash 163688120, now seen corresponding path program 28 times [2020-10-15 20:03:56,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:56,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874824874] [2020-10-15 20:03:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:56,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874824874] [2020-10-15 20:03:56,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156840335] [2020-10-15 20:03:56,951 INFO L93 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:56,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:03:56,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:56,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:03:56,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:57,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 20:03:57,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-10-15 20:03:57,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141295008] [2020-10-15 20:03:57,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:03:57,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:57,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:03:57,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:03:57,277 INFO L87 Difference]: Start difference. First operand 227 states and 611 transitions. Second operand 9 states. [2020-10-15 20:03:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:57,351 INFO L93 Difference]: Finished difference Result 338 states and 895 transitions. [2020-10-15 20:03:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 20:03:57,354 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-15 20:03:57,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:57,355 INFO L225 Difference]: With dead ends: 338 [2020-10-15 20:03:57,355 INFO L226 Difference]: Without dead ends: 312 [2020-10-15 20:03:57,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:03:57,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-15 20:03:57,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2020-10-15 20:03:57,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-15 20:03:57,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 836 transitions. [2020-10-15 20:03:57,360 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 836 transitions. Word has length 14 [2020-10-15 20:03:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:57,360 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 836 transitions. [2020-10-15 20:03:57,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:03:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 836 transitions. [2020-10-15 20:03:57,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:03:57,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:57,360 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:57,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2020-10-15 20:03:57,562 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:57,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:57,563 INFO L82 PathProgramCache]: Analyzing trace with hash 491277249, now seen corresponding path program 241 times [2020-10-15 20:03:57,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:57,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978739412] [2020-10-15 20:03:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:57,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978739412] [2020-10-15 20:03:57,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138917824] [2020-10-15 20:03:57,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:57,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:03:57,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:58,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:58,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:03:58,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673740586] [2020-10-15 20:03:58,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:03:58,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:58,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:03:58,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:03:58,382 INFO L87 Difference]: Start difference. First operand 312 states and 836 transitions. Second operand 19 states. [2020-10-15 20:03:58,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:58,570 INFO L93 Difference]: Finished difference Result 353 states and 914 transitions. [2020-10-15 20:03:58,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:03:58,573 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:03:58,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:58,574 INFO L225 Difference]: With dead ends: 353 [2020-10-15 20:03:58,574 INFO L226 Difference]: Without dead ends: 351 [2020-10-15 20:03:58,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:03:58,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-15 20:03:58,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 324. [2020-10-15 20:03:58,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-15 20:03:58,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 870 transitions. [2020-10-15 20:03:58,579 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 870 transitions. Word has length 15 [2020-10-15 20:03:58,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:58,580 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 870 transitions. [2020-10-15 20:03:58,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:03:58,580 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 870 transitions. [2020-10-15 20:03:58,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:03:58,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:58,580 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:58,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:58,781 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:58,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:58,781 INFO L82 PathProgramCache]: Analyzing trace with hash 491278210, now seen corresponding path program 242 times [2020-10-15 20:03:58,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:58,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941881818] [2020-10-15 20:03:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:59,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941881818] [2020-10-15 20:03:59,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075577054] [2020-10-15 20:03:59,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:59,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:03:59,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:59,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:03:59,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:59,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:59,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:03:59,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919035882] [2020-10-15 20:03:59,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:03:59,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:59,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:03:59,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:03:59,695 INFO L87 Difference]: Start difference. First operand 324 states and 870 transitions. Second operand 19 states. [2020-10-15 20:04:00,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:00,274 INFO L93 Difference]: Finished difference Result 377 states and 965 transitions. [2020-10-15 20:04:00,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:04:00,275 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:04:00,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:00,276 INFO L225 Difference]: With dead ends: 377 [2020-10-15 20:04:00,276 INFO L226 Difference]: Without dead ends: 374 [2020-10-15 20:04:00,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:04:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-15 20:04:00,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 325. [2020-10-15 20:04:00,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-15 20:04:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 873 transitions. [2020-10-15 20:04:00,280 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 873 transitions. Word has length 15 [2020-10-15 20:04:00,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:00,280 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 873 transitions. [2020-10-15 20:04:00,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:04:00,280 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 873 transitions. [2020-10-15 20:04:00,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:04:00,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:00,281 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:00,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-10-15 20:04:00,481 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:00,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:00,482 INFO L82 PathProgramCache]: Analyzing trace with hash 491307040, now seen corresponding path program 243 times [2020-10-15 20:04:00,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:00,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040966161] [2020-10-15 20:04:00,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:00,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040966161] [2020-10-15 20:04:00,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148176813] [2020-10-15 20:04:00,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:00,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:04:00,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:00,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:04:00,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:01,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:01,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:04:01,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447424005] [2020-10-15 20:04:01,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:04:01,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:01,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:04:01,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:04:01,481 INFO L87 Difference]: Start difference. First operand 325 states and 873 transitions. Second operand 19 states. [2020-10-15 20:04:02,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:02,428 INFO L93 Difference]: Finished difference Result 408 states and 1035 transitions. [2020-10-15 20:04:02,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:04:02,431 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:04:02,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:02,432 INFO L225 Difference]: With dead ends: 408 [2020-10-15 20:04:02,432 INFO L226 Difference]: Without dead ends: 404 [2020-10-15 20:04:02,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:04:02,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-15 20:04:02,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 327. [2020-10-15 20:04:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-15 20:04:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 879 transitions. [2020-10-15 20:04:02,437 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 879 transitions. Word has length 15 [2020-10-15 20:04:02,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:02,437 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 879 transitions. [2020-10-15 20:04:02,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:04:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 879 transitions. [2020-10-15 20:04:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:04:02,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:02,438 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:02,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:02,639 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:02,639 INFO L82 PathProgramCache]: Analyzing trace with hash 492200770, now seen corresponding path program 244 times [2020-10-15 20:04:02,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:02,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117138967] [2020-10-15 20:04:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:02,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117138967] [2020-10-15 20:04:02,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429607930] [2020-10-15 20:04:02,939 INFO L93 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:02,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:04:02,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:02,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:04:02,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:07,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:07,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:04:07,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427196182] [2020-10-15 20:04:07,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:04:07,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:07,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:04:07,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:04:07,309 INFO L87 Difference]: Start difference. First operand 327 states and 879 transitions. Second operand 19 states. [2020-10-15 20:04:08,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:08,225 INFO L93 Difference]: Finished difference Result 406 states and 1027 transitions. [2020-10-15 20:04:08,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:04:08,228 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:04:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:08,229 INFO L225 Difference]: With dead ends: 406 [2020-10-15 20:04:08,229 INFO L226 Difference]: Without dead ends: 403 [2020-10-15 20:04:08,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:04:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-15 20:04:08,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 329. [2020-10-15 20:04:08,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-15 20:04:08,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 885 transitions. [2020-10-15 20:04:08,236 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 885 transitions. Word has length 15 [2020-10-15 20:04:08,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:08,236 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 885 transitions. [2020-10-15 20:04:08,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:04:08,236 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 885 transitions. [2020-10-15 20:04:08,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:04:08,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:08,237 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:08,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-10-15 20:04:08,449 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:08,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:08,450 INFO L82 PathProgramCache]: Analyzing trace with hash 492201731, now seen corresponding path program 245 times [2020-10-15 20:04:08,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:08,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026347328] [2020-10-15 20:04:08,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:08,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026347328] [2020-10-15 20:04:08,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235766019] [2020-10-15 20:04:08,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:08,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:04:08,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:08,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:04:08,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:13,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:13,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:04:13,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284631882] [2020-10-15 20:04:13,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:04:13,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:13,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:04:13,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=236, Unknown=1, NotChecked=0, Total=342 [2020-10-15 20:04:13,477 INFO L87 Difference]: Start difference. First operand 329 states and 885 transitions. Second operand 19 states. [2020-10-15 20:04:17,930 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-15 20:04:18,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:18,726 INFO L93 Difference]: Finished difference Result 437 states and 1102 transitions. [2020-10-15 20:04:18,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:04:18,730 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:04:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:18,731 INFO L225 Difference]: With dead ends: 437 [2020-10-15 20:04:18,731 INFO L226 Difference]: Without dead ends: 432 [2020-10-15 20:04:18,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=231, Invalid=470, Unknown=1, NotChecked=0, Total=702 [2020-10-15 20:04:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-15 20:04:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 330. [2020-10-15 20:04:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-15 20:04:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2020-10-15 20:04:18,737 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 15 [2020-10-15 20:04:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:18,737 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2020-10-15 20:04:18,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:04:18,737 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2020-10-15 20:04:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:04:18,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:18,737 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:18,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:18,938 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:18,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:18,939 INFO L82 PathProgramCache]: Analyzing trace with hash 492230561, now seen corresponding path program 246 times [2020-10-15 20:04:18,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:18,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250905935] [2020-10-15 20:04:18,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:19,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250905935] [2020-10-15 20:04:19,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478340693] [2020-10-15 20:04:19,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:19,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:04:19,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:19,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:04:19,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:19,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:19,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:04:19,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614548448] [2020-10-15 20:04:19,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:04:19,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:19,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:04:19,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:04:19,924 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand 19 states. [2020-10-15 20:04:21,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:21,032 INFO L93 Difference]: Finished difference Result 427 states and 1079 transitions. [2020-10-15 20:04:21,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:04:21,035 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:04:21,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:21,037 INFO L225 Difference]: With dead ends: 427 [2020-10-15 20:04:21,037 INFO L226 Difference]: Without dead ends: 423 [2020-10-15 20:04:21,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:04:21,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-15 20:04:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 330. [2020-10-15 20:04:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-15 20:04:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2020-10-15 20:04:21,042 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 15 [2020-10-15 20:04:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:21,042 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2020-10-15 20:04:21,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:04:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2020-10-15 20:04:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:04:21,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:21,043 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:21,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:21,244 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:21,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:21,244 INFO L82 PathProgramCache]: Analyzing trace with hash 519906400, now seen corresponding path program 247 times [2020-10-15 20:04:21,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:21,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258337336] [2020-10-15 20:04:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:21,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258337336] [2020-10-15 20:04:21,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377994431] [2020-10-15 20:04:21,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:21,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:04:21,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:22,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:22,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:22,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:04:22,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474787385] [2020-10-15 20:04:22,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:04:22,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:22,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:04:22,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:04:22,316 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand 19 states. [2020-10-15 20:04:23,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:23,658 INFO L93 Difference]: Finished difference Result 411 states and 1040 transitions. [2020-10-15 20:04:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:04:23,661 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:04:23,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:23,662 INFO L225 Difference]: With dead ends: 411 [2020-10-15 20:04:23,662 INFO L226 Difference]: Without dead ends: 408 [2020-10-15 20:04:23,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:04:23,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-15 20:04:23,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 333. [2020-10-15 20:04:23,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-15 20:04:23,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 897 transitions. [2020-10-15 20:04:23,667 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 897 transitions. Word has length 15 [2020-10-15 20:04:23,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:23,667 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 897 transitions. [2020-10-15 20:04:23,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:04:23,667 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 897 transitions. [2020-10-15 20:04:23,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:04:23,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:23,668 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:23,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2020-10-15 20:04:23,868 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:23,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:23,869 INFO L82 PathProgramCache]: Analyzing trace with hash 519907361, now seen corresponding path program 248 times [2020-10-15 20:04:23,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:23,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788666236] [2020-10-15 20:04:23,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:24,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788666236] [2020-10-15 20:04:24,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935273087] [2020-10-15 20:04:24,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:24,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:04:24,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:24,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:04:24,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:24,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:24,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:04:24,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32204249] [2020-10-15 20:04:24,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:04:24,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:24,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:04:24,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:04:24,833 INFO L87 Difference]: Start difference. First operand 333 states and 897 transitions. Second operand 19 states. [2020-10-15 20:04:25,704 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-15 20:04:26,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:26,124 INFO L93 Difference]: Finished difference Result 441 states and 1112 transitions. [2020-10-15 20:04:26,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:04:26,127 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:04:26,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:26,128 INFO L225 Difference]: With dead ends: 441 [2020-10-15 20:04:26,129 INFO L226 Difference]: Without dead ends: 436 [2020-10-15 20:04:26,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:04:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-15 20:04:26,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 333. [2020-10-15 20:04:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-15 20:04:26,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 897 transitions. [2020-10-15 20:04:26,134 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 897 transitions. Word has length 15 [2020-10-15 20:04:26,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:26,134 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 897 transitions. [2020-10-15 20:04:26,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:04:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 897 transitions. [2020-10-15 20:04:26,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:04:26,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:26,135 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:26,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:26,335 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:26,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:26,336 INFO L82 PathProgramCache]: Analyzing trace with hash 519936191, now seen corresponding path program 249 times [2020-10-15 20:04:26,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:26,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838261325] [2020-10-15 20:04:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:26,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838261325] [2020-10-15 20:04:26,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420102214] [2020-10-15 20:04:26,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:26,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:04:26,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:26,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:04:26,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:41,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:41,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:04:41,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130022683] [2020-10-15 20:04:41,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:04:41,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:41,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:04:41,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=234, Unknown=3, NotChecked=0, Total=342 [2020-10-15 20:04:41,826 INFO L87 Difference]: Start difference. First operand 333 states and 897 transitions. Second operand 19 states. [2020-10-15 20:04:46,287 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 20:04:58,931 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-15 20:05:01,115 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-15 20:05:08,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:08,899 INFO L93 Difference]: Finished difference Result 455 states and 1144 transitions. [2020-10-15 20:05:08,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:05:08,904 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:08,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:08,905 INFO L225 Difference]: With dead ends: 455 [2020-10-15 20:05:08,905 INFO L226 Difference]: Without dead ends: 450 [2020-10-15 20:05:08,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=253, Invalid=498, Unknown=5, NotChecked=0, Total=756 [2020-10-15 20:05:08,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-15 20:05:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 334. [2020-10-15 20:05:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-15 20:05:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 900 transitions. [2020-10-15 20:05:08,919 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 900 transitions. Word has length 15 [2020-10-15 20:05:08,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:08,919 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 900 transitions. [2020-10-15 20:05:08,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 900 transitions. [2020-10-15 20:05:08,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:08,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:08,919 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:09,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:09,120 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:09,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:09,123 INFO L82 PathProgramCache]: Analyzing trace with hash 520830882, now seen corresponding path program 250 times [2020-10-15 20:05:09,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:09,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674529171] [2020-10-15 20:05:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:09,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674529171] [2020-10-15 20:05:09,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279827359] [2020-10-15 20:05:09,435 INFO L93 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:09,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:05:09,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:09,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:09,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:11,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:11,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:11,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754135135] [2020-10-15 20:05:11,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:11,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:11,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:11,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:11,551 INFO L87 Difference]: Start difference. First operand 334 states and 900 transitions. Second operand 19 states. [2020-10-15 20:05:12,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:12,840 INFO L93 Difference]: Finished difference Result 464 states and 1169 transitions. [2020-10-15 20:05:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:05:12,843 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:12,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:12,844 INFO L225 Difference]: With dead ends: 464 [2020-10-15 20:05:12,844 INFO L226 Difference]: Without dead ends: 458 [2020-10-15 20:05:12,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:05:12,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-10-15 20:05:12,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 334. [2020-10-15 20:05:12,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-15 20:05:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 900 transitions. [2020-10-15 20:05:12,849 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 900 transitions. Word has length 15 [2020-10-15 20:05:12,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:12,849 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 900 transitions. [2020-10-15 20:05:12,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:12,849 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 900 transitions. [2020-10-15 20:05:12,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:12,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:12,850 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:13,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:13,051 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:13,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:13,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1378780930, now seen corresponding path program 251 times [2020-10-15 20:05:13,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:13,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491729997] [2020-10-15 20:05:13,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:13,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491729997] [2020-10-15 20:05:13,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746203497] [2020-10-15 20:05:13,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:13,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:05:13,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:13,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:13,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:13,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:13,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:13,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570244284] [2020-10-15 20:05:13,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:13,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:13,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:13,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:13,925 INFO L87 Difference]: Start difference. First operand 334 states and 900 transitions. Second operand 19 states. [2020-10-15 20:05:15,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:15,154 INFO L93 Difference]: Finished difference Result 414 states and 1047 transitions. [2020-10-15 20:05:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:05:15,158 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:15,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:15,159 INFO L225 Difference]: With dead ends: 414 [2020-10-15 20:05:15,159 INFO L226 Difference]: Without dead ends: 411 [2020-10-15 20:05:15,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:05:15,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-15 20:05:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 338. [2020-10-15 20:05:15,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-15 20:05:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 912 transitions. [2020-10-15 20:05:15,165 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 912 transitions. Word has length 15 [2020-10-15 20:05:15,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:15,165 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 912 transitions. [2020-10-15 20:05:15,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 912 transitions. [2020-10-15 20:05:15,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:15,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:15,165 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:15,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:15,366 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:15,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:15,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1378781891, now seen corresponding path program 252 times [2020-10-15 20:05:15,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:15,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947715641] [2020-10-15 20:05:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:15,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947715641] [2020-10-15 20:05:15,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926196179] [2020-10-15 20:05:15,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:15,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:05:15,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:15,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:15,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:16,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:16,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:16,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491508786] [2020-10-15 20:05:16,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:16,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:16,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:16,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:16,305 INFO L87 Difference]: Start difference. First operand 338 states and 912 transitions. Second operand 19 states. [2020-10-15 20:05:17,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:17,370 INFO L93 Difference]: Finished difference Result 441 states and 1109 transitions. [2020-10-15 20:05:17,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:05:17,374 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:17,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:17,375 INFO L225 Difference]: With dead ends: 441 [2020-10-15 20:05:17,375 INFO L226 Difference]: Without dead ends: 437 [2020-10-15 20:05:17,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:05:17,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-15 20:05:17,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 337. [2020-10-15 20:05:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-15 20:05:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 909 transitions. [2020-10-15 20:05:17,381 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 909 transitions. Word has length 15 [2020-10-15 20:05:17,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:17,381 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 909 transitions. [2020-10-15 20:05:17,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:17,381 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 909 transitions. [2020-10-15 20:05:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:17,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:17,382 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:17,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-10-15 20:05:17,584 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:17,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:17,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1378810721, now seen corresponding path program 253 times [2020-10-15 20:05:17,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:17,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664513765] [2020-10-15 20:05:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:17,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664513765] [2020-10-15 20:05:17,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454065272] [2020-10-15 20:05:17,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:17,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:17,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:19,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:19,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:19,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379092190] [2020-10-15 20:05:19,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:19,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:19,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:19,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:19,947 INFO L87 Difference]: Start difference. First operand 337 states and 909 transitions. Second operand 19 states. [2020-10-15 20:05:21,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:21,165 INFO L93 Difference]: Finished difference Result 454 states and 1141 transitions. [2020-10-15 20:05:21,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:05:21,169 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:21,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:21,170 INFO L225 Difference]: With dead ends: 454 [2020-10-15 20:05:21,170 INFO L226 Difference]: Without dead ends: 449 [2020-10-15 20:05:21,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:05:21,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-10-15 20:05:21,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 336. [2020-10-15 20:05:21,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-15 20:05:21,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 906 transitions. [2020-10-15 20:05:21,175 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 906 transitions. Word has length 15 [2020-10-15 20:05:21,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:21,175 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 906 transitions. [2020-10-15 20:05:21,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:21,176 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 906 transitions. [2020-10-15 20:05:21,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:21,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:21,176 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:21,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-10-15 20:05:21,377 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:21,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:21,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1379704451, now seen corresponding path program 254 times [2020-10-15 20:05:21,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:21,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863218862] [2020-10-15 20:05:21,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:21,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863218862] [2020-10-15 20:05:21,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438751382] [2020-10-15 20:05:21,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:21,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:05:21,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:21,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:21,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:22,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:22,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:22,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720514470] [2020-10-15 20:05:22,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:22,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:22,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:22,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:22,186 INFO L87 Difference]: Start difference. First operand 336 states and 906 transitions. Second operand 19 states. [2020-10-15 20:05:23,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:23,280 INFO L93 Difference]: Finished difference Result 464 states and 1163 transitions. [2020-10-15 20:05:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:05:23,285 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:23,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:23,286 INFO L225 Difference]: With dead ends: 464 [2020-10-15 20:05:23,286 INFO L226 Difference]: Without dead ends: 459 [2020-10-15 20:05:23,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:05:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-15 20:05:23,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 341. [2020-10-15 20:05:23,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-15 20:05:23,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 921 transitions. [2020-10-15 20:05:23,292 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 921 transitions. Word has length 15 [2020-10-15 20:05:23,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:23,292 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 921 transitions. [2020-10-15 20:05:23,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:23,292 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 921 transitions. [2020-10-15 20:05:23,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:23,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:23,292 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:23,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-10-15 20:05:23,493 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:23,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:23,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1379705412, now seen corresponding path program 255 times [2020-10-15 20:05:23,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:23,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373196401] [2020-10-15 20:05:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:23,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373196401] [2020-10-15 20:05:23,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183600427] [2020-10-15 20:05:23,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:23,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:05:23,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:23,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:23,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:24,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:24,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:24,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270751283] [2020-10-15 20:05:24,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:24,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:24,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:24,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:24,242 INFO L87 Difference]: Start difference. First operand 341 states and 921 transitions. Second operand 19 states. [2020-10-15 20:05:25,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:25,153 INFO L93 Difference]: Finished difference Result 475 states and 1194 transitions. [2020-10-15 20:05:25,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:05:25,157 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:25,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:25,159 INFO L225 Difference]: With dead ends: 475 [2020-10-15 20:05:25,159 INFO L226 Difference]: Without dead ends: 469 [2020-10-15 20:05:25,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:05:25,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-15 20:05:25,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 342. [2020-10-15 20:05:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-15 20:05:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 924 transitions. [2020-10-15 20:05:25,165 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 924 transitions. Word has length 15 [2020-10-15 20:05:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:25,165 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 924 transitions. [2020-10-15 20:05:25,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:25,165 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 924 transitions. [2020-10-15 20:05:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:25,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:25,165 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:25,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:25,366 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:25,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:25,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1379734242, now seen corresponding path program 256 times [2020-10-15 20:05:25,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:25,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283652383] [2020-10-15 20:05:25,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:25,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283652383] [2020-10-15 20:05:25,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776095686] [2020-10-15 20:05:25,676 INFO L93 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:25,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:05:25,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:25,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:25,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:26,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:26,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:26,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565650805] [2020-10-15 20:05:26,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:26,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:26,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:26,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:26,192 INFO L87 Difference]: Start difference. First operand 342 states and 924 transitions. Second operand 19 states. [2020-10-15 20:05:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:27,361 INFO L93 Difference]: Finished difference Result 474 states and 1199 transitions. [2020-10-15 20:05:27,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:05:27,364 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:27,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:27,365 INFO L225 Difference]: With dead ends: 474 [2020-10-15 20:05:27,366 INFO L226 Difference]: Without dead ends: 468 [2020-10-15 20:05:27,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:05:27,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-15 20:05:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 340. [2020-10-15 20:05:27,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-15 20:05:27,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 918 transitions. [2020-10-15 20:05:27,372 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 918 transitions. Word has length 15 [2020-10-15 20:05:27,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:27,372 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 918 transitions. [2020-10-15 20:05:27,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:27,372 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 918 transitions. [2020-10-15 20:05:27,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:27,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:27,373 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:27,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2020-10-15 20:05:27,574 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:27,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:27,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1407411042, now seen corresponding path program 257 times [2020-10-15 20:05:27,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:27,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168389808] [2020-10-15 20:05:27,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:27,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168389808] [2020-10-15 20:05:27,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224527319] [2020-10-15 20:05:27,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:27,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:05:27,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:27,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:28,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:28,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:28,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255640048] [2020-10-15 20:05:28,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:28,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:28,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:28,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:28,498 INFO L87 Difference]: Start difference. First operand 340 states and 918 transitions. Second operand 19 states. [2020-10-15 20:05:30,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:30,086 INFO L93 Difference]: Finished difference Result 478 states and 1207 transitions. [2020-10-15 20:05:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:05:30,089 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:30,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:30,090 INFO L225 Difference]: With dead ends: 478 [2020-10-15 20:05:30,090 INFO L226 Difference]: Without dead ends: 472 [2020-10-15 20:05:30,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:05:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-10-15 20:05:30,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 340. [2020-10-15 20:05:30,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-15 20:05:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 918 transitions. [2020-10-15 20:05:30,096 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 918 transitions. Word has length 15 [2020-10-15 20:05:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:30,096 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 918 transitions. [2020-10-15 20:05:30,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 918 transitions. [2020-10-15 20:05:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:30,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:30,097 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:30,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2020-10-15 20:05:30,297 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:30,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:30,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1407439872, now seen corresponding path program 258 times [2020-10-15 20:05:30,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:30,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467521948] [2020-10-15 20:05:30,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:30,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467521948] [2020-10-15 20:05:30,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133489940] [2020-10-15 20:05:30,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:30,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:05:30,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:30,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:30,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:37,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:37,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:37,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349214874] [2020-10-15 20:05:37,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:37,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:37,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:37,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-15 20:05:37,689 INFO L87 Difference]: Start difference. First operand 340 states and 918 transitions. Second operand 19 states. [2020-10-15 20:05:42,252 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-15 20:05:46,625 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-15 20:05:49,283 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-15 20:05:49,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:49,643 INFO L93 Difference]: Finished difference Result 461 states and 1164 transitions. [2020-10-15 20:05:49,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:05:49,647 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:49,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:49,649 INFO L225 Difference]: With dead ends: 461 [2020-10-15 20:05:49,649 INFO L226 Difference]: Without dead ends: 456 [2020-10-15 20:05:49,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-15 20:05:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-15 20:05:49,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 338. [2020-10-15 20:05:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-15 20:05:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 912 transitions. [2020-10-15 20:05:49,654 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 912 transitions. Word has length 15 [2020-10-15 20:05:49,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:49,655 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 912 transitions. [2020-10-15 20:05:49,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:49,655 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 912 transitions. [2020-10-15 20:05:49,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:49,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:49,655 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:49,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:49,856 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:49,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:49,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1408364354, now seen corresponding path program 259 times [2020-10-15 20:05:49,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:49,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802610556] [2020-10-15 20:05:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:50,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802610556] [2020-10-15 20:05:50,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595319391] [2020-10-15 20:05:50,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:50,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:50,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:50,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:50,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:50,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119763140] [2020-10-15 20:05:50,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:50,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:50,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:50,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:50,783 INFO L87 Difference]: Start difference. First operand 338 states and 912 transitions. Second operand 19 states. [2020-10-15 20:05:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:51,773 INFO L93 Difference]: Finished difference Result 438 states and 1112 transitions. [2020-10-15 20:05:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:05:51,777 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:51,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:51,778 INFO L225 Difference]: With dead ends: 438 [2020-10-15 20:05:51,778 INFO L226 Difference]: Without dead ends: 417 [2020-10-15 20:05:51,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:05:51,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-15 20:05:51,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 339. [2020-10-15 20:05:51,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-15 20:05:51,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 907 transitions. [2020-10-15 20:05:51,784 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 907 transitions. Word has length 15 [2020-10-15 20:05:51,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:51,784 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 907 transitions. [2020-10-15 20:05:51,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 907 transitions. [2020-10-15 20:05:51,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:51,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:51,785 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:51,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:51,985 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:51,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:51,986 INFO L82 PathProgramCache]: Analyzing trace with hash -2060879712, now seen corresponding path program 260 times [2020-10-15 20:05:51,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:51,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951874329] [2020-10-15 20:05:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:52,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951874329] [2020-10-15 20:05:52,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730131489] [2020-10-15 20:05:52,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:52,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:05:52,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:52,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:52,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:52,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:52,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:52,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242876849] [2020-10-15 20:05:52,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:52,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:52,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:52,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:52,825 INFO L87 Difference]: Start difference. First operand 339 states and 907 transitions. Second operand 19 states. [2020-10-15 20:05:53,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:53,678 INFO L93 Difference]: Finished difference Result 406 states and 1029 transitions. [2020-10-15 20:05:53,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:05:53,680 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:53,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:53,681 INFO L225 Difference]: With dead ends: 406 [2020-10-15 20:05:53,681 INFO L226 Difference]: Without dead ends: 403 [2020-10-15 20:05:53,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:05:53,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-15 20:05:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 345. [2020-10-15 20:05:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-15 20:05:53,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 923 transitions. [2020-10-15 20:05:53,687 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 923 transitions. Word has length 15 [2020-10-15 20:05:53,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:53,687 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 923 transitions. [2020-10-15 20:05:53,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:53,687 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 923 transitions. [2020-10-15 20:05:53,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:53,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:53,687 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:53,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:53,888 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:53,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:53,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2060878751, now seen corresponding path program 261 times [2020-10-15 20:05:53,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:53,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133403818] [2020-10-15 20:05:53,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:54,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133403818] [2020-10-15 20:05:54,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845898403] [2020-10-15 20:05:54,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:54,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:05:54,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:54,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:54,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:54,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:54,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:54,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124863674] [2020-10-15 20:05:54,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:54,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:54,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:54,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:54,798 INFO L87 Difference]: Start difference. First operand 345 states and 923 transitions. Second operand 19 states. [2020-10-15 20:05:55,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:55,698 INFO L93 Difference]: Finished difference Result 436 states and 1098 transitions. [2020-10-15 20:05:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:05:55,702 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:55,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:55,708 INFO L225 Difference]: With dead ends: 436 [2020-10-15 20:05:55,709 INFO L226 Difference]: Without dead ends: 432 [2020-10-15 20:05:55,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:05:55,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-15 20:05:55,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 344. [2020-10-15 20:05:55,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-15 20:05:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 920 transitions. [2020-10-15 20:05:55,713 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 920 transitions. Word has length 15 [2020-10-15 20:05:55,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:55,713 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 920 transitions. [2020-10-15 20:05:55,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:55,713 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 920 transitions. [2020-10-15 20:05:55,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:55,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:55,714 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:55,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2020-10-15 20:05:55,914 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:55,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:55,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2060849921, now seen corresponding path program 262 times [2020-10-15 20:05:55,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:55,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271957871] [2020-10-15 20:05:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:56,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271957871] [2020-10-15 20:05:56,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728693188] [2020-10-15 20:05:56,289 INFO L93 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:56,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:05:56,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:56,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:56,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:57,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:57,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:57,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776162419] [2020-10-15 20:05:57,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:57,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:57,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:57,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:57,092 INFO L87 Difference]: Start difference. First operand 344 states and 920 transitions. Second operand 19 states. [2020-10-15 20:05:58,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:58,212 INFO L93 Difference]: Finished difference Result 452 states and 1133 transitions. [2020-10-15 20:05:58,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:05:58,216 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:58,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:58,218 INFO L225 Difference]: With dead ends: 452 [2020-10-15 20:05:58,218 INFO L226 Difference]: Without dead ends: 447 [2020-10-15 20:05:58,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:05:58,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-15 20:05:58,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 343. [2020-10-15 20:05:58,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-15 20:05:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 917 transitions. [2020-10-15 20:05:58,224 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 917 transitions. Word has length 15 [2020-10-15 20:05:58,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:58,224 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 917 transitions. [2020-10-15 20:05:58,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:58,224 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 917 transitions. [2020-10-15 20:05:58,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:58,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:58,225 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:58,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:58,425 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:58,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:58,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2059956191, now seen corresponding path program 263 times [2020-10-15 20:05:58,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:58,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456937248] [2020-10-15 20:05:58,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:58,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456937248] [2020-10-15 20:05:58,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373785860] [2020-10-15 20:05:58,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:58,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:05:58,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:58,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:58,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:59,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:59,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:59,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599607783] [2020-10-15 20:05:59,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:59,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:59,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:59,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:59,348 INFO L87 Difference]: Start difference. First operand 343 states and 917 transitions. Second operand 19 states. [2020-10-15 20:06:00,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:00,683 INFO L93 Difference]: Finished difference Result 451 states and 1130 transitions. [2020-10-15 20:06:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:06:00,687 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:00,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:00,689 INFO L225 Difference]: With dead ends: 451 [2020-10-15 20:06:00,689 INFO L226 Difference]: Without dead ends: 446 [2020-10-15 20:06:00,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:06:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-15 20:06:00,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 350. [2020-10-15 20:06:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-15 20:06:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 936 transitions. [2020-10-15 20:06:00,694 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 936 transitions. Word has length 15 [2020-10-15 20:06:00,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:00,695 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 936 transitions. [2020-10-15 20:06:00,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 936 transitions. [2020-10-15 20:06:00,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:00,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:00,695 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:00,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2020-10-15 20:06:00,896 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:00,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:00,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2059955230, now seen corresponding path program 264 times [2020-10-15 20:06:00,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:00,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824145721] [2020-10-15 20:06:00,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:01,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824145721] [2020-10-15 20:06:01,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430513572] [2020-10-15 20:06:01,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:01,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:06:01,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:01,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:01,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:08,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:08,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:08,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796887559] [2020-10-15 20:06:08,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:08,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:08,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:08,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-15 20:06:08,352 INFO L87 Difference]: Start difference. First operand 350 states and 936 transitions. Second operand 19 states. [2020-10-15 20:06:13,168 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-15 20:06:17,451 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-15 20:06:19,893 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-15 20:06:20,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:20,565 INFO L93 Difference]: Finished difference Result 481 states and 1200 transitions. [2020-10-15 20:06:20,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:06:20,570 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:20,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:20,571 INFO L225 Difference]: With dead ends: 481 [2020-10-15 20:06:20,571 INFO L226 Difference]: Without dead ends: 475 [2020-10-15 20:06:20,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-15 20:06:20,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-15 20:06:20,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 353. [2020-10-15 20:06:20,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-15 20:06:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 945 transitions. [2020-10-15 20:06:20,577 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 945 transitions. Word has length 15 [2020-10-15 20:06:20,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:20,577 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 945 transitions. [2020-10-15 20:06:20,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:20,577 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 945 transitions. [2020-10-15 20:06:20,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:20,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:20,578 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:20,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-10-15 20:06:20,778 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:20,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:20,779 INFO L82 PathProgramCache]: Analyzing trace with hash -2059926400, now seen corresponding path program 265 times [2020-10-15 20:06:20,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:20,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222149761] [2020-10-15 20:06:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:21,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222149761] [2020-10-15 20:06:21,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221560156] [2020-10-15 20:06:21,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:21,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:21,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:21,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:21,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:21,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812911981] [2020-10-15 20:06:21,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:21,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:21,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:21,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:21,980 INFO L87 Difference]: Start difference. First operand 353 states and 945 transitions. Second operand 19 states. [2020-10-15 20:06:22,648 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-10-15 20:06:23,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:23,801 INFO L93 Difference]: Finished difference Result 482 states and 1207 transitions. [2020-10-15 20:06:23,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:06:23,805 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:23,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:23,807 INFO L225 Difference]: With dead ends: 482 [2020-10-15 20:06:23,807 INFO L226 Difference]: Without dead ends: 476 [2020-10-15 20:06:23,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:06:23,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-10-15 20:06:23,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 351. [2020-10-15 20:06:23,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-15 20:06:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 939 transitions. [2020-10-15 20:06:23,813 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 939 transitions. Word has length 15 [2020-10-15 20:06:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:23,813 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 939 transitions. [2020-10-15 20:06:23,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:23,813 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 939 transitions. [2020-10-15 20:06:23,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:23,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:23,813 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:24,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-10-15 20:06:24,014 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:24,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:24,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2032250561, now seen corresponding path program 266 times [2020-10-15 20:06:24,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:24,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443191671] [2020-10-15 20:06:24,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:24,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443191671] [2020-10-15 20:06:24,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148349734] [2020-10-15 20:06:24,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:24,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:06:24,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:24,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:24,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:24,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:24,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:24,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338513958] [2020-10-15 20:06:24,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:24,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:24,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:24,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:24,954 INFO L87 Difference]: Start difference. First operand 351 states and 939 transitions. Second operand 19 states. [2020-10-15 20:06:26,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:26,287 INFO L93 Difference]: Finished difference Result 460 states and 1154 transitions. [2020-10-15 20:06:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:06:26,292 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:26,293 INFO L225 Difference]: With dead ends: 460 [2020-10-15 20:06:26,293 INFO L226 Difference]: Without dead ends: 455 [2020-10-15 20:06:26,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:06:26,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-15 20:06:26,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 356. [2020-10-15 20:06:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-15 20:06:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 952 transitions. [2020-10-15 20:06:26,299 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 952 transitions. Word has length 15 [2020-10-15 20:06:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:26,299 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 952 transitions. [2020-10-15 20:06:26,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 952 transitions. [2020-10-15 20:06:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:26,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:26,300 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:26,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-10-15 20:06:26,500 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:26,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:26,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2032220770, now seen corresponding path program 267 times [2020-10-15 20:06:26,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:26,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017992465] [2020-10-15 20:06:26,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:26,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017992465] [2020-10-15 20:06:26,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034769178] [2020-10-15 20:06:26,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:26,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:06:26,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:26,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:26,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:27,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:27,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:27,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255076146] [2020-10-15 20:06:27,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:27,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:27,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:27,335 INFO L87 Difference]: Start difference. First operand 356 states and 952 transitions. Second operand 19 states. [2020-10-15 20:06:28,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:28,504 INFO L93 Difference]: Finished difference Result 481 states and 1200 transitions. [2020-10-15 20:06:28,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:06:28,509 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:28,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:28,510 INFO L225 Difference]: With dead ends: 481 [2020-10-15 20:06:28,511 INFO L226 Difference]: Without dead ends: 475 [2020-10-15 20:06:28,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:06:28,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-15 20:06:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 354. [2020-10-15 20:06:28,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-15 20:06:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 946 transitions. [2020-10-15 20:06:28,516 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 946 transitions. Word has length 15 [2020-10-15 20:06:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:28,517 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 946 transitions. [2020-10-15 20:06:28,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:28,517 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 946 transitions. [2020-10-15 20:06:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:28,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:28,517 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:28,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2020-10-15 20:06:28,718 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:28,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:28,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2031296288, now seen corresponding path program 268 times [2020-10-15 20:06:28,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:28,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882023799] [2020-10-15 20:06:28,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:29,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882023799] [2020-10-15 20:06:29,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677037386] [2020-10-15 20:06:29,024 INFO L93 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:29,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:06:29,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:29,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:29,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:29,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:29,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:29,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705409419] [2020-10-15 20:06:29,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:29,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:29,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:29,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:29,666 INFO L87 Difference]: Start difference. First operand 354 states and 946 transitions. Second operand 19 states. [2020-10-15 20:06:30,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:30,939 INFO L93 Difference]: Finished difference Result 442 states and 1116 transitions. [2020-10-15 20:06:30,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:06:30,941 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:30,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:30,942 INFO L225 Difference]: With dead ends: 442 [2020-10-15 20:06:30,942 INFO L226 Difference]: Without dead ends: 423 [2020-10-15 20:06:30,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:06:30,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-15 20:06:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 352. [2020-10-15 20:06:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-15 20:06:30,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 940 transitions. [2020-10-15 20:06:30,947 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 940 transitions. Word has length 15 [2020-10-15 20:06:30,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:30,947 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 940 transitions. [2020-10-15 20:06:30,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:30,947 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 940 transitions. [2020-10-15 20:06:30,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:30,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:30,948 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:31,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-10-15 20:06:31,148 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:31,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:31,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1173375070, now seen corresponding path program 269 times [2020-10-15 20:06:31,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:31,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181045064] [2020-10-15 20:06:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:31,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181045064] [2020-10-15 20:06:31,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292977275] [2020-10-15 20:06:31,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:31,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:06:31,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:31,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:31,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:32,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:32,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:32,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043379912] [2020-10-15 20:06:32,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:32,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:32,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:32,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:32,439 INFO L87 Difference]: Start difference. First operand 352 states and 940 transitions. Second operand 19 states. [2020-10-15 20:06:32,725 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-15 20:06:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:33,691 INFO L93 Difference]: Finished difference Result 456 states and 1147 transitions. [2020-10-15 20:06:33,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:06:33,696 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:33,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:33,697 INFO L225 Difference]: With dead ends: 456 [2020-10-15 20:06:33,697 INFO L226 Difference]: Without dead ends: 450 [2020-10-15 20:06:33,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:06:33,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-15 20:06:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 350. [2020-10-15 20:06:33,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-15 20:06:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 934 transitions. [2020-10-15 20:06:33,703 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 934 transitions. Word has length 15 [2020-10-15 20:06:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:33,703 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 934 transitions. [2020-10-15 20:06:33,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:33,703 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 934 transitions. [2020-10-15 20:06:33,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:33,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:33,703 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:33,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2020-10-15 20:06:33,904 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:33,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:33,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1173345279, now seen corresponding path program 270 times [2020-10-15 20:06:33,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:33,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421804600] [2020-10-15 20:06:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:34,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421804600] [2020-10-15 20:06:34,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634082698] [2020-10-15 20:06:34,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:34,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:06:34,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:34,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:34,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:37,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:37,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:37,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254474049] [2020-10-15 20:06:37,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:37,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:37,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:37,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:37,780 INFO L87 Difference]: Start difference. First operand 350 states and 934 transitions. Second operand 19 states. [2020-10-15 20:06:38,045 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-15 20:06:39,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:39,383 INFO L93 Difference]: Finished difference Result 466 states and 1163 transitions. [2020-10-15 20:06:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:06:39,388 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:39,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:39,389 INFO L225 Difference]: With dead ends: 466 [2020-10-15 20:06:39,389 INFO L226 Difference]: Without dead ends: 446 [2020-10-15 20:06:39,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=291, Invalid=579, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:06:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-15 20:06:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 345. [2020-10-15 20:06:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-15 20:06:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 919 transitions. [2020-10-15 20:06:39,395 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 919 transitions. Word has length 15 [2020-10-15 20:06:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:39,395 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 919 transitions. [2020-10-15 20:06:39,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 919 transitions. [2020-10-15 20:06:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:39,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:39,396 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:39,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:39,596 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:39,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:39,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1143823359, now seen corresponding path program 271 times [2020-10-15 20:06:39,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:39,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137842789] [2020-10-15 20:06:39,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:40,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137842789] [2020-10-15 20:06:40,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73900232] [2020-10-15 20:06:40,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:40,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:40,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:40,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:40,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:40,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352306685] [2020-10-15 20:06:40,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:40,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:40,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:40,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:40,755 INFO L87 Difference]: Start difference. First operand 345 states and 919 transitions. Second operand 19 states. [2020-10-15 20:06:41,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:41,539 INFO L93 Difference]: Finished difference Result 437 states and 1106 transitions. [2020-10-15 20:06:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:06:41,543 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:41,544 INFO L225 Difference]: With dead ends: 437 [2020-10-15 20:06:41,544 INFO L226 Difference]: Without dead ends: 422 [2020-10-15 20:06:41,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=214, Invalid=436, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:06:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-15 20:06:41,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 350. [2020-10-15 20:06:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-15 20:06:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 928 transitions. [2020-10-15 20:06:41,558 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 928 transitions. Word has length 15 [2020-10-15 20:06:41,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:41,558 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 928 transitions. [2020-10-15 20:06:41,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:41,558 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 928 transitions. [2020-10-15 20:06:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:41,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:41,559 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:41,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2020-10-15 20:06:41,773 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:41,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:41,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1143822398, now seen corresponding path program 272 times [2020-10-15 20:06:41,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:41,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229093267] [2020-10-15 20:06:41,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:42,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229093267] [2020-10-15 20:06:42,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491437411] [2020-10-15 20:06:42,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:42,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:06:42,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:42,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:42,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:42,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:42,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:42,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269554617] [2020-10-15 20:06:42,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:42,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:42,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:42,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:42,998 INFO L87 Difference]: Start difference. First operand 350 states and 928 transitions. Second operand 19 states. [2020-10-15 20:06:43,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:43,867 INFO L93 Difference]: Finished difference Result 433 states and 1087 transitions. [2020-10-15 20:06:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:06:43,871 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:43,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:43,873 INFO L225 Difference]: With dead ends: 433 [2020-10-15 20:06:43,873 INFO L226 Difference]: Without dead ends: 417 [2020-10-15 20:06:43,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:06:43,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-15 20:06:43,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 349. [2020-10-15 20:06:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-15 20:06:43,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 925 transitions. [2020-10-15 20:06:43,878 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 925 transitions. Word has length 15 [2020-10-15 20:06:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:43,878 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 925 transitions. [2020-10-15 20:06:43,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:43,879 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 925 transitions. [2020-10-15 20:06:43,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:43,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:43,879 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:44,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:44,080 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:44,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:44,081 INFO L82 PathProgramCache]: Analyzing trace with hash 439565519, now seen corresponding path program 273 times [2020-10-15 20:06:44,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:44,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638236180] [2020-10-15 20:06:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:44,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638236180] [2020-10-15 20:06:44,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135537450] [2020-10-15 20:06:44,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:44,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:06:44,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:44,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:44,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:45,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:45,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:45,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595001721] [2020-10-15 20:06:45,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:45,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:45,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:45,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:45,243 INFO L87 Difference]: Start difference. First operand 349 states and 925 transitions. Second operand 19 states. [2020-10-15 20:06:45,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:45,519 INFO L93 Difference]: Finished difference Result 394 states and 1001 transitions. [2020-10-15 20:06:45,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:06:45,524 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:45,525 INFO L225 Difference]: With dead ends: 394 [2020-10-15 20:06:45,525 INFO L226 Difference]: Without dead ends: 392 [2020-10-15 20:06:45,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:06:45,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-15 20:06:45,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 357. [2020-10-15 20:06:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-15 20:06:45,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 949 transitions. [2020-10-15 20:06:45,530 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 949 transitions. Word has length 15 [2020-10-15 20:06:45,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:45,531 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 949 transitions. [2020-10-15 20:06:45,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 949 transitions. [2020-10-15 20:06:45,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:45,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:45,531 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:45,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:45,732 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:45,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash 439566480, now seen corresponding path program 274 times [2020-10-15 20:06:45,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:45,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312052839] [2020-10-15 20:06:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:46,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312052839] [2020-10-15 20:06:46,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413208830] [2020-10-15 20:06:46,296 INFO L93 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 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:46,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:06:46,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:46,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:46,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:46,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:46,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:46,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311990114] [2020-10-15 20:06:46,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:46,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:46,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:46,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:46,944 INFO L87 Difference]: Start difference. First operand 357 states and 949 transitions. Second operand 19 states. [2020-10-15 20:06:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:47,853 INFO L93 Difference]: Finished difference Result 420 states and 1064 transitions. [2020-10-15 20:06:47,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:06:47,858 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:47,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:47,859 INFO L225 Difference]: With dead ends: 420 [2020-10-15 20:06:47,859 INFO L226 Difference]: Without dead ends: 417 [2020-10-15 20:06:47,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:06:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-15 20:06:47,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 355. [2020-10-15 20:06:47,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-15 20:06:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-15 20:06:47,864 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-15 20:06:47,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:47,864 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-15 20:06:47,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:47,864 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-15 20:06:47,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:47,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:47,865 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:48,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:48,077 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:48,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:48,077 INFO L82 PathProgramCache]: Analyzing trace with hash 439595310, now seen corresponding path program 275 times [2020-10-15 20:06:48,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:48,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591866713] [2020-10-15 20:06:48,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:48,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591866713] [2020-10-15 20:06:48,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352585267] [2020-10-15 20:06:48,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:48,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:06:48,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:48,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:48,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:49,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:49,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:49,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602250951] [2020-10-15 20:06:49,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:49,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:49,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:49,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:49,384 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-15 20:06:50,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:50,607 INFO L93 Difference]: Finished difference Result 452 states and 1140 transitions. [2020-10-15 20:06:50,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:06:50,612 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:50,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:50,613 INFO L225 Difference]: With dead ends: 452 [2020-10-15 20:06:50,613 INFO L226 Difference]: Without dead ends: 448 [2020-10-15 20:06:50,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:06:50,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-10-15 20:06:50,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 353. [2020-10-15 20:06:50,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-15 20:06:50,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 937 transitions. [2020-10-15 20:06:50,619 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 937 transitions. Word has length 15 [2020-10-15 20:06:50,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:50,619 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 937 transitions. [2020-10-15 20:06:50,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:50,619 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 937 transitions. [2020-10-15 20:06:50,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:50,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:50,620 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:50,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-10-15 20:06:50,821 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:50,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:50,821 INFO L82 PathProgramCache]: Analyzing trace with hash 440489040, now seen corresponding path program 276 times [2020-10-15 20:06:50,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:50,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307927873] [2020-10-15 20:06:50,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:51,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307927873] [2020-10-15 20:06:51,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862875045] [2020-10-15 20:06:51,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:51,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:06:51,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:51,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:51,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:56,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:56,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:56,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553834791] [2020-10-15 20:06:56,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:56,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:56,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:56,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:56,035 INFO L87 Difference]: Start difference. First operand 353 states and 937 transitions. Second operand 19 states. [2020-10-15 20:06:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:57,574 INFO L93 Difference]: Finished difference Result 446 states and 1118 transitions. [2020-10-15 20:06:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:06:57,579 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:57,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:57,580 INFO L225 Difference]: With dead ends: 446 [2020-10-15 20:06:57,580 INFO L226 Difference]: Without dead ends: 443 [2020-10-15 20:06:57,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:06:57,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-15 20:06:57,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 355. [2020-10-15 20:06:57,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-15 20:06:57,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-15 20:06:57,586 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-15 20:06:57,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:57,586 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-15 20:06:57,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:57,586 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-15 20:06:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:57,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:57,587 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:57,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-10-15 20:06:57,788 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:57,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:57,788 INFO L82 PathProgramCache]: Analyzing trace with hash 440490001, now seen corresponding path program 277 times [2020-10-15 20:06:57,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:57,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315870647] [2020-10-15 20:06:57,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:58,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315870647] [2020-10-15 20:06:58,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590959467] [2020-10-15 20:06:58,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:58,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:58,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:01,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:01,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:07:01,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142399264] [2020-10-15 20:07:01,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:07:01,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:01,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:07:01,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=251, Unknown=1, NotChecked=0, Total=342 [2020-10-15 20:07:01,048 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-15 20:07:05,635 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-15 20:07:06,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:07:06,693 INFO L93 Difference]: Finished difference Result 483 states and 1210 transitions. [2020-10-15 20:07:06,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:07:06,695 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:07:06,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:07:06,696 INFO L225 Difference]: With dead ends: 483 [2020-10-15 20:07:06,696 INFO L226 Difference]: Without dead ends: 478 [2020-10-15 20:07:06,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=256, Invalid=555, Unknown=1, NotChecked=0, Total=812 [2020-10-15 20:07:06,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-15 20:07:06,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 355. [2020-10-15 20:07:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-15 20:07:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-15 20:07:06,701 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-15 20:07:06,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:07:06,701 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-15 20:07:06,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:07:06,701 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-15 20:07:06,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:07:06,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:07:06,702 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:07:06,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-10-15 20:07:06,903 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:07:06,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:07:06,903 INFO L82 PathProgramCache]: Analyzing trace with hash 440518831, now seen corresponding path program 278 times [2020-10-15 20:07:06,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:07:06,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908580694] [2020-10-15 20:07:06,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:07:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:07,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908580694] [2020-10-15 20:07:07,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316914556] [2020-10-15 20:07:07,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:07,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:07:07,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:07:07,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:07:07,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:08,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:08,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:07:08,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253748907] [2020-10-15 20:07:08,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:07:08,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:08,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:07:08,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:07:08,234 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-15 20:07:09,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:07:09,768 INFO L93 Difference]: Finished difference Result 469 states and 1175 transitions. [2020-10-15 20:07:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:07:09,774 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:07:09,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:07:09,775 INFO L225 Difference]: With dead ends: 469 [2020-10-15 20:07:09,775 INFO L226 Difference]: Without dead ends: 465 [2020-10-15 20:07:09,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:07:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-15 20:07:09,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 351. [2020-10-15 20:07:09,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-15 20:07:09,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 931 transitions. [2020-10-15 20:07:09,780 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 931 transitions. Word has length 15 [2020-10-15 20:07:09,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:07:09,780 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 931 transitions. [2020-10-15 20:07:09,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:07:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 931 transitions. [2020-10-15 20:07:09,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:07:09,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:07:09,781 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:07:09,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-10-15 20:07:09,981 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:07:09,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:07:09,982 INFO L82 PathProgramCache]: Analyzing trace with hash 468194670, now seen corresponding path program 279 times [2020-10-15 20:07:09,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:07:09,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828298881] [2020-10-15 20:07:09,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:07:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:10,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828298881] [2020-10-15 20:07:10,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442484586] [2020-10-15 20:07:10,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:10,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:07:10,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:07:10,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:07:10,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:15,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:15,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:07:15,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703150557] [2020-10-15 20:07:15,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:07:15,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:15,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:07:15,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:07:15,122 INFO L87 Difference]: Start difference. First operand 351 states and 931 transitions. Second operand 19 states. [2020-10-15 20:07:16,258 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-10-15 20:07:16,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:07:16,979 INFO L93 Difference]: Finished difference Result 440 states and 1101 transitions. [2020-10-15 20:07:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:07:16,984 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:07:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:07:16,985 INFO L225 Difference]: With dead ends: 440 [2020-10-15 20:07:16,985 INFO L226 Difference]: Without dead ends: 437 [2020-10-15 20:07:16,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=312, Invalid=680, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:07:16,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-15 20:07:16,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 354. [2020-10-15 20:07:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-15 20:07:16,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 940 transitions. [2020-10-15 20:07:16,992 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 940 transitions. Word has length 15 [2020-10-15 20:07:16,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:07:16,992 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 940 transitions. [2020-10-15 20:07:16,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:07:16,992 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 940 transitions. [2020-10-15 20:07:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:07:16,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:07:16,993 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:07:17,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:17,195 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:07:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:07:17,196 INFO L82 PathProgramCache]: Analyzing trace with hash 468195631, now seen corresponding path program 280 times [2020-10-15 20:07:17,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:07:17,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841349306] [2020-10-15 20:07:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:07:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:17,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841349306] [2020-10-15 20:07:17,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596779858] [2020-10-15 20:07:17,596 INFO L93 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:17,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:07:17,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:07:17,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:07:17,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:18,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:18,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:07:18,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493953133] [2020-10-15 20:07:18,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:07:18,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:18,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:07:18,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:07:18,306 INFO L87 Difference]: Start difference. First operand 354 states and 940 transitions. Second operand 19 states. [2020-10-15 20:07:19,438 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-15 20:07:20,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:07:20,017 INFO L93 Difference]: Finished difference Result 478 states and 1194 transitions. [2020-10-15 20:07:20,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:07:20,020 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:07:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:07:20,021 INFO L225 Difference]: With dead ends: 478 [2020-10-15 20:07:20,022 INFO L226 Difference]: Without dead ends: 473 [2020-10-15 20:07:20,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:07:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-10-15 20:07:20,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 354. [2020-10-15 20:07:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-15 20:07:20,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 940 transitions. [2020-10-15 20:07:20,032 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 940 transitions. Word has length 15 [2020-10-15 20:07:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:07:20,032 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 940 transitions. [2020-10-15 20:07:20,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:07:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 940 transitions. [2020-10-15 20:07:20,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:07:20,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:07:20,033 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:07:20,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-10-15 20:07:20,248 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:07:20,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:07:20,248 INFO L82 PathProgramCache]: Analyzing trace with hash 468224461, now seen corresponding path program 281 times [2020-10-15 20:07:20,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:07:20,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085552937] [2020-10-15 20:07:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:07:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:20,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085552937] [2020-10-15 20:07:20,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342394999] [2020-10-15 20:07:20,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:20,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:07:20,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:07:20,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:07:20,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2020-10-15 20:07:27,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-10-15 20:07:27,417 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-15 20:07:27,421 WARN L235 ceAbstractionStarter]: Timeout [2020-10-15 20:07:27,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:07:27 BasicIcfg [2020-10-15 20:07:27,421 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 20:07:27,422 INFO L168 Benchmark]: Toolchain (without parser) took 877180.63 ms. Allocated memory was 251.1 MB in the beginning and 228.1 MB in the end (delta: -23.1 MB). Free memory was 204.0 MB in the beginning and 140.8 MB in the end (delta: 63.1 MB). Peak memory consumption was 40.1 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:27,422 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 251.1 MB. Free memory is still 225.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 20:07:27,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 682.45 ms. Allocated memory was 251.1 MB in the beginning and 315.1 MB in the end (delta: 64.0 MB). Free memory was 204.0 MB in the beginning and 270.5 MB in the end (delta: -66.5 MB). Peak memory consumption was 30.4 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:27,423 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.81 ms. Allocated memory is still 315.1 MB. Free memory is still 270.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 20:07:27,423 INFO L168 Benchmark]: Boogie Preprocessor took 28.85 ms. Allocated memory is still 315.1 MB. Free memory was 270.5 MB in the beginning and 268.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:27,423 INFO L168 Benchmark]: RCFGBuilder took 376.80 ms. Allocated memory is still 315.1 MB. Free memory was 268.0 MB in the beginning and 246.2 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:27,423 INFO L168 Benchmark]: TraceAbstraction took 876040.54 ms. Allocated memory was 315.1 MB in the beginning and 228.1 MB in the end (delta: -87.0 MB). Free memory was 246.2 MB in the beginning and 140.8 MB in the end (delta: 105.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:27,425 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 251.1 MB. Free memory is still 225.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 682.45 ms. Allocated memory was 251.1 MB in the beginning and 315.1 MB in the end (delta: 64.0 MB). Free memory was 204.0 MB in the beginning and 270.5 MB in the end (delta: -66.5 MB). Peak memory consumption was 30.4 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 46.81 ms. Allocated memory is still 315.1 MB. Free memory is still 270.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.85 ms. Allocated memory is still 315.1 MB. Free memory was 270.5 MB in the beginning and 268.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 376.80 ms. Allocated memory is still 315.1 MB. Free memory was 268.0 MB in the beginning and 246.2 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 876040.54 ms. Allocated memory was 315.1 MB in the beginning and 228.1 MB in the end (delta: -87.0 MB). Free memory was 246.2 MB in the beginning and 140.8 MB in the end (delta: 105.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 697 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.1s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 50 TotalNumberOfCompositions, 943 MoverChecksTotal - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 18 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 875.9s, OverallIterations: 317, TraceHistogramMax: 7, AutomataDifference: 554.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 4167 SDtfs, 37060 SDslu, 32656 SDs, 0 SdLazy, 23312 SolverSat, 9805 SolverUnsat, 69 SolverUnknown, 0 SolverNotchecked, 165.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9316 GetRequests, 1534 SyntacticMatches, 285 SemanticMatches, 7497 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51240 ImplicationChecksByTransitivity, 586.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=357occurred in iteration=309, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 316 MinimizatonAttempts, 20721 StatesRemovedByMinimization, 314 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 4.8s SatisfiabilityAnalysisTime, 232.2s InterpolantComputationTime, 8278 NumberOfCodeBlocks, 8276 NumberOfCodeBlocksAsserted, 1002 NumberOfCheckSat, 7654 ConstructedInterpolants, 49 QuantifiedInterpolants, 887544 SizeOfPredicates, 306 NumberOfNonLiveVariables, 27877 ConjunctsInSsa, 3206 ConjunctsInUnsatCore, 624 InterpolantComputations, 10 PerfectInterpolantSequences, 42/3948 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown