/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 12:44:19,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 12:44:19,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 12:44:19,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 12:44:19,241 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 12:44:19,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 12:44:19,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 12:44:19,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 12:44:19,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 12:44:19,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 12:44:19,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 12:44:19,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 12:44:19,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 12:44:19,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 12:44:19,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 12:44:19,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 12:44:19,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 12:44:19,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 12:44:19,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 12:44:19,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 12:44:19,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 12:44:19,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 12:44:19,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 12:44:19,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 12:44:19,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-11 12:44:19,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-11 12:44:19,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-11 12:44:19,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-11 12:44:19,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-11 12:44:19,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-11 12:44:19,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 12:44:19,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 12:44:19,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 12:44:19,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 12:44:19,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 12:44:19,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 12:44:19,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 12:44:19,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 12:44:19,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 12:44:19,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 12:44:19,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 12:44:19,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-11 12:44:19,349 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 12:44:19,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 12:44:19,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 12:44:19,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 12:44:19,351 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 12:44:19,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 12:44:19,352 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 12:44:19,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 12:44:19,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 12:44:19,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 12:44:19,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 12:44:19,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 12:44:19,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 12:44:19,354 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 12:44:19,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 12:44:19,355 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 12:44:19,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 12:44:19,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 12:44:19,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 12:44:19,356 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 12:44:19,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 12:44:19,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 12:44:19,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 12:44:19,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 12:44:19,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 12:44:19,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 12:44:19,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 12:44:19,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-11 12:44:19,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-11 12:44:19,358 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 12:44:19,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 12:44:19,692 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 12:44:19,696 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 12:44:19,698 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 12:44:19,698 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 12:44:19,699 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-10-11 12:44:19,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56e299e38/58dc24fd485d41908bb9efab514d9186/FLAG59003afbb [2020-10-11 12:44:20,279 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 12:44:20,280 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-10-11 12:44:20,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56e299e38/58dc24fd485d41908bb9efab514d9186/FLAG59003afbb [2020-10-11 12:44:20,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56e299e38/58dc24fd485d41908bb9efab514d9186 [2020-10-11 12:44:20,599 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 12:44:20,601 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 12:44:20,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 12:44:20,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 12:44:20,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 12:44:20,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:44:20" (1/1) ... [2020-10-11 12:44:20,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@896f2ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:20, skipping insertion in model container [2020-10-11 12:44:20,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:44:20" (1/1) ... [2020-10-11 12:44:20,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 12:44:20,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 12:44:21,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 12:44:21,258 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 12:44:21,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 12:44:21,403 INFO L208 MainTranslator]: Completed translation [2020-10-11 12:44:21,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21 WrapperNode [2020-10-11 12:44:21,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 12:44:21,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 12:44:21,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 12:44:21,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 12:44:21,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 12:44:21,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 12:44:21,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 12:44:21,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 12:44:21,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (1/1) ... [2020-10-11 12:44:21,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 12:44:21,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 12:44:21,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 12:44:21,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 12:44:21,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (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 [2020-10-11 12:44:21,573 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-11 12:44:21,574 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-11 12:44:21,574 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-11 12:44:21,574 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-11 12:44:21,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 12:44:21,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-11 12:44:21,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 12:44:21,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 12:44:21,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-11 12:44:21,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 12:44:21,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 12:44:21,580 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 12:44:21,995 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 12:44:21,996 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-11 12:44:21,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:44:21 BoogieIcfgContainer [2020-10-11 12:44:21,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 12:44:22,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 12:44:22,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 12:44:22,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 12:44:22,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:44:20" (1/3) ... [2020-10-11 12:44:22,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2145b10f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:44:22, skipping insertion in model container [2020-10-11 12:44:22,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:44:21" (2/3) ... [2020-10-11 12:44:22,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2145b10f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:44:22, skipping insertion in model container [2020-10-11 12:44:22,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:44:21" (3/3) ... [2020-10-11 12:44:22,008 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2020-10-11 12:44:22,019 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-11 12:44:22,019 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 12:44:22,028 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 12:44:22,029 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 12:44:22,072 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,073 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,073 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,073 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,074 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,075 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,075 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,076 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,076 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,076 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,076 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,076 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,077 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,077 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,077 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,078 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,078 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,078 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,078 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,079 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,079 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,079 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,079 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,080 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,080 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,080 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,080 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,081 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,081 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,081 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,087 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,087 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,087 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,087 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,088 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,088 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,093 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,093 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,093 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,093 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,094 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,094 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 12:44:22,109 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-11 12:44:22,129 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 12:44:22,130 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-11 12:44:22,130 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 12:44:22,130 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 12:44:22,130 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 12:44:22,130 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 12:44:22,130 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 12:44:22,131 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 12:44:22,144 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-11 12:44:22,146 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-11 12:44:22,149 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-11 12:44:22,151 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-11 12:44:22,189 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-11 12:44:22,189 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 12:44:22,197 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. [2020-10-11 12:44:22,199 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-11 12:44:23,228 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-11 12:44:23,318 INFO L132 LiptonReduction]: Checked pairs total: 943 [2020-10-11 12:44:23,318 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-11 12:44:23,326 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-11 12:44:23,338 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-11 12:44:23,340 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-11 12:44:23,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-11 12:44:23,347 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:23,348 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-11 12:44:23,348 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:23,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:23,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-11 12:44:23,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:23,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897919010] [2020-10-11 12:44:23,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:23,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897919010] [2020-10-11 12:44:23,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:23,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 12:44:23,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651268439] [2020-10-11 12:44:23,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 12:44:23,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:23,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 12:44:23,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-11 12:44:23,605 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-11 12:44:23,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:23,672 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-11 12:44:23,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-11 12:44:23,674 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-11 12:44:23,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:23,686 INFO L225 Difference]: With dead ends: 83 [2020-10-11 12:44:23,687 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 12:44:23,688 INFO L673 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 [2020-10-11 12:44:23,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 12:44:23,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-11 12:44:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 12:44:23,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-11 12:44:23,767 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-11 12:44:23,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:23,768 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-11 12:44:23,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 12:44:23,768 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-11 12:44:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-11 12:44:23,770 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:23,770 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:23,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 12:44:23,784 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:23,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:23,784 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-11 12:44:23,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:23,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711643348] [2020-10-11 12:44:23,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:23,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711643348] [2020-10-11 12:44:23,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:23,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 12:44:23,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761394021] [2020-10-11 12:44:23,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 12:44:23,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:23,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 12:44:23,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-11 12:44:23,949 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-11 12:44:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:24,005 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-11 12:44:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:24,006 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-11 12:44:24,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:24,008 INFO L225 Difference]: With dead ends: 80 [2020-10-11 12:44:24,008 INFO L226 Difference]: Without dead ends: 75 [2020-10-11 12:44:24,009 INFO L673 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 [2020-10-11 12:44:24,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-11 12:44:24,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-11 12:44:24,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-11 12:44:24,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-11 12:44:24,022 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-11 12:44:24,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:24,023 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-11 12:44:24,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 12:44:24,023 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-11 12:44:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-11 12:44:24,025 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:24,025 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:24,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 12:44:24,025 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:24,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:24,026 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-11 12:44:24,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:24,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359558660] [2020-10-11 12:44:24,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:24,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359558660] [2020-10-11 12:44:24,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:24,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 12:44:24,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899618781] [2020-10-11 12:44:24,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 12:44:24,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:24,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 12:44:24,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 12:44:24,112 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-11 12:44:24,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:24,157 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-11 12:44:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-11 12:44:24,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-11 12:44:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:24,162 INFO L225 Difference]: With dead ends: 73 [2020-10-11 12:44:24,162 INFO L226 Difference]: Without dead ends: 70 [2020-10-11 12:44:24,163 INFO L673 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 [2020-10-11 12:44:24,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-11 12:44:24,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-11 12:44:24,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 12:44:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-11 12:44:24,185 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-11 12:44:24,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:24,188 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-11 12:44:24,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 12:44:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-11 12:44:24,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-11 12:44:24,190 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:24,190 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:24,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 12:44:24,190 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:24,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:24,194 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-11 12:44:24,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:24,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656450961] [2020-10-11 12:44:24,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:24,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656450961] [2020-10-11 12:44:24,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:24,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 12:44:24,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761666162] [2020-10-11 12:44:24,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 12:44:24,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:24,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 12:44:24,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-11 12:44:24,272 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-11 12:44:24,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:24,335 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-11 12:44:24,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:24,336 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-11 12:44:24,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:24,337 INFO L225 Difference]: With dead ends: 86 [2020-10-11 12:44:24,338 INFO L226 Difference]: Without dead ends: 80 [2020-10-11 12:44:24,338 INFO L673 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 [2020-10-11 12:44:24,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-11 12:44:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-11 12:44:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 12:44:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-11 12:44:24,349 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-11 12:44:24,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:24,349 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-11 12:44:24,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 12:44:24,349 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-11 12:44:24,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-11 12:44:24,350 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:24,351 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:24,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 12:44:24,351 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:24,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:24,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-11 12:44:24,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:24,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537583433] [2020-10-11 12:44:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:24,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537583433] [2020-10-11 12:44:24,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268835718] [2020-10-11 12:44:24,481 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 [2020-10-11 12:44:24,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:24,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:24,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 12:44:24,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:24,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:24,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:24,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-11 12:44:24,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683724546] [2020-10-11 12:44:24,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 12:44:24,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:24,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 12:44:24,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-11 12:44:24,678 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-11 12:44:24,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:24,746 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-11 12:44:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:24,746 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-11 12:44:24,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:24,748 INFO L225 Difference]: With dead ends: 101 [2020-10-11 12:44:24,748 INFO L226 Difference]: Without dead ends: 96 [2020-10-11 12:44:24,748 INFO L673 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 [2020-10-11 12:44:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-11 12:44:24,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-11 12:44:24,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-11 12:44:24,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-11 12:44:24,757 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-11 12:44:24,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:24,757 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-11 12:44:24,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 12:44:24,757 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-11 12:44:24,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-11 12:44:24,758 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:24,759 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:24,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:24,974 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:24,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:24,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-11 12:44:24,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:24,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137956324] [2020-10-11 12:44:24,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:25,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137956324] [2020-10-11 12:44:25,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312319596] [2020-10-11 12:44:25,044 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 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 [2020-10-11 12:44:25,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:25,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:25,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 12:44:25,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:25,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:25,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-11 12:44:25,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064446879] [2020-10-11 12:44:25,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 12:44:25,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:25,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 12:44:25,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:25,161 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-11 12:44:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:25,194 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-11 12:44:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 12:44:25,195 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-11 12:44:25,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:25,197 INFO L225 Difference]: With dead ends: 84 [2020-10-11 12:44:25,197 INFO L226 Difference]: Without dead ends: 81 [2020-10-11 12:44:25,198 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-11 12:44:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-11 12:44:25,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 12:44:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-11 12:44:25,205 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-11 12:44:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:25,206 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-11 12:44:25,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 12:44:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-11 12:44:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-11 12:44:25,207 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:25,207 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:25,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:25,422 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:25,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:25,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-11 12:44:25,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:25,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369979282] [2020-10-11 12:44:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:25,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369979282] [2020-10-11 12:44:25,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317305960] [2020-10-11 12:44:25,520 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 [2020-10-11 12:44:25,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:25,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:25,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 12:44:25,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:25,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:25,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-11 12:44:25,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250975084] [2020-10-11 12:44:25,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 12:44:25,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:25,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 12:44:25,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:25,629 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-11 12:44:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:25,707 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-11 12:44:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:25,708 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-11 12:44:25,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:25,710 INFO L225 Difference]: With dead ends: 90 [2020-10-11 12:44:25,710 INFO L226 Difference]: Without dead ends: 87 [2020-10-11 12:44:25,710 INFO L673 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 [2020-10-11 12:44:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-11 12:44:25,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-11 12:44:25,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 12:44:25,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-11 12:44:25,729 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-11 12:44:25,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:25,730 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-11 12:44:25,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 12:44:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-11 12:44:25,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-11 12:44:25,734 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:25,735 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:25,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:25,950 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:25,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:25,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-11 12:44:25,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:25,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384867919] [2020-10-11 12:44:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384867919] [2020-10-11 12:44:26,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12315803] [2020-10-11 12:44:26,006 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 [2020-10-11 12:44:26,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:26,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:26,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 12:44:26,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:26,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:26,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-11 12:44:26,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028467155] [2020-10-11 12:44:26,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 12:44:26,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:26,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 12:44:26,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:26,137 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-11 12:44:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:26,235 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-11 12:44:26,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:26,236 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-11 12:44:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:26,237 INFO L225 Difference]: With dead ends: 99 [2020-10-11 12:44:26,237 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 12:44:26,237 INFO L673 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 [2020-10-11 12:44:26,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 12:44:26,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-11 12:44:26,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-11 12:44:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-11 12:44:26,244 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-11 12:44:26,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:26,244 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-11 12:44:26,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 12:44:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-11 12:44:26,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:26,245 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:26,245 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:26,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:26,459 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:26,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:26,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-11 12:44:26,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:26,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932613] [2020-10-11 12:44:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932613] [2020-10-11 12:44:26,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:26,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 12:44:26,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543353605] [2020-10-11 12:44:26,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 12:44:26,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:26,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 12:44:26,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-11 12:44:26,525 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-11 12:44:26,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:26,555 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-11 12:44:26,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 12:44:26,555 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 12:44:26,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:26,556 INFO L225 Difference]: With dead ends: 92 [2020-10-11 12:44:26,557 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 12:44:26,557 INFO L673 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 [2020-10-11 12:44:26,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 12:44:26,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-11 12:44:26,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-11 12:44:26,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-11 12:44:26,563 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-11 12:44:26,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:26,563 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-11 12:44:26,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 12:44:26,563 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-11 12:44:26,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:26,564 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:26,564 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:26,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-11 12:44:26,565 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:26,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:26,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-11 12:44:26,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:26,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051365900] [2020-10-11 12:44:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051365900] [2020-10-11 12:44:26,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:26,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 12:44:26,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324877265] [2020-10-11 12:44:26,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 12:44:26,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:26,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 12:44:26,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-11 12:44:26,631 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-11 12:44:26,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:26,675 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-11 12:44:26,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:26,675 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 12:44:26,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:26,676 INFO L225 Difference]: With dead ends: 100 [2020-10-11 12:44:26,677 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 12:44:26,677 INFO L673 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 [2020-10-11 12:44:26,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 12:44:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-11 12:44:26,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-11 12:44:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-11 12:44:26,682 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-11 12:44:26,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:26,683 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-11 12:44:26,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 12:44:26,683 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-11 12:44:26,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:26,684 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:26,684 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:26,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-11 12:44:26,684 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:26,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-11 12:44:26,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:26,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321950922] [2020-10-11 12:44:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321950922] [2020-10-11 12:44:26,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:26,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 12:44:26,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117427450] [2020-10-11 12:44:26,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 12:44:26,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:26,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 12:44:26,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-11 12:44:26,738 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-11 12:44:26,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:26,829 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-11 12:44:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:26,830 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 12:44:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:26,831 INFO L225 Difference]: With dead ends: 105 [2020-10-11 12:44:26,831 INFO L226 Difference]: Without dead ends: 100 [2020-10-11 12:44:26,832 INFO L673 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 [2020-10-11 12:44:26,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-11 12:44:26,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-11 12:44:26,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 12:44:26,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-11 12:44:26,847 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-11 12:44:26,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:26,847 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-11 12:44:26,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 12:44:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-11 12:44:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:26,849 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:26,849 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:26,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-11 12:44:26,849 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:26,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:26,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-11 12:44:26,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:26,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212849417] [2020-10-11 12:44:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:26,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212849417] [2020-10-11 12:44:26,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 12:44:26,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 12:44:26,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801456366] [2020-10-11 12:44:26,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 12:44:26,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:26,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 12:44:26,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-11 12:44:26,934 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-11 12:44:27,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:27,012 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-11 12:44:27,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:27,013 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 12:44:27,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:27,014 INFO L225 Difference]: With dead ends: 105 [2020-10-11 12:44:27,015 INFO L226 Difference]: Without dead ends: 100 [2020-10-11 12:44:27,015 INFO L673 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 [2020-10-11 12:44:27,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-11 12:44:27,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-11 12:44:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 12:44:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-11 12:44:27,021 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-11 12:44:27,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:27,022 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-11 12:44:27,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 12:44:27,022 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-11 12:44:27,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:27,024 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:27,024 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:27,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-11 12:44:27,024 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:27,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:27,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-11 12:44:27,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:27,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904780593] [2020-10-11 12:44:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:27,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904780593] [2020-10-11 12:44:27,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430118063] [2020-10-11 12:44:27,116 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 [2020-10-11 12:44:27,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:27,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:27,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:27,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:27,265 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:27,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:27,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-11 12:44:27,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064782889] [2020-10-11 12:44:27,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 12:44:27,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:27,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 12:44:27,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-11 12:44:27,288 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-11 12:44:27,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:27,378 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-11 12:44:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:27,379 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-11 12:44:27,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:27,380 INFO L225 Difference]: With dead ends: 122 [2020-10-11 12:44:27,380 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 12:44:27,381 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:44:27,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 12:44:27,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-11 12:44:27,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 12:44:27,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-11 12:44:27,387 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-11 12:44:27,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:27,387 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-11 12:44:27,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 12:44:27,387 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-11 12:44:27,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:27,388 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:27,388 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:27,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-11 12:44:27,600 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:27,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:27,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-11 12:44:27,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:27,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713894193] [2020-10-11 12:44:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:27,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713894193] [2020-10-11 12:44:27,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134329791] [2020-10-11 12:44:27,682 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 [2020-10-11 12:44:27,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:27,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:27,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:27,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:27,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:27,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:27,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542863103] [2020-10-11 12:44:27,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:27,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:27,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:27,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:27,808 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-11 12:44:27,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:27,839 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-11 12:44:27,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:27,840 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-11 12:44:27,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:27,841 INFO L225 Difference]: With dead ends: 108 [2020-10-11 12:44:27,841 INFO L226 Difference]: Without dead ends: 105 [2020-10-11 12:44:27,841 INFO L673 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 [2020-10-11 12:44:27,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-11 12:44:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-11 12:44:27,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-11 12:44:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-11 12:44:27,845 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-11 12:44:27,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:27,845 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-11 12:44:27,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:27,846 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-11 12:44:27,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:27,846 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:27,846 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:28,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:28,057 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:28,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-11 12:44:28,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:28,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364824571] [2020-10-11 12:44:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:28,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364824571] [2020-10-11 12:44:28,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142703671] [2020-10-11 12:44:28,128 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 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 [2020-10-11 12:44:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:28,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:28,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:28,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:28,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:28,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307879360] [2020-10-11 12:44:28,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:28,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:28,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:28,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:28,233 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-11 12:44:28,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:28,288 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-11 12:44:28,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:28,289 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-11 12:44:28,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:28,290 INFO L225 Difference]: With dead ends: 116 [2020-10-11 12:44:28,290 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 12:44:28,290 INFO L673 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 [2020-10-11 12:44:28,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 12:44:28,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-11 12:44:28,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 12:44:28,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-11 12:44:28,294 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-11 12:44:28,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:28,295 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-11 12:44:28,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:28,295 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-11 12:44:28,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:28,296 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:28,296 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:28,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-11 12:44:28,506 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:28,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:28,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-11 12:44:28,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:28,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627679729] [2020-10-11 12:44:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:28,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627679729] [2020-10-11 12:44:28,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674334781] [2020-10-11 12:44:28,568 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 [2020-10-11 12:44:28,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:28,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:28,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:28,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:28,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:28,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:28,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962747762] [2020-10-11 12:44:28,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:28,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:28,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:28,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:28,702 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-11 12:44:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:28,791 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-11 12:44:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:28,793 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-11 12:44:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:28,794 INFO L225 Difference]: With dead ends: 115 [2020-10-11 12:44:28,794 INFO L226 Difference]: Without dead ends: 112 [2020-10-11 12:44:28,795 INFO L673 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 [2020-10-11 12:44:28,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-11 12:44:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-11 12:44:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-11 12:44:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-11 12:44:28,799 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-11 12:44:28,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:28,800 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-11 12:44:28,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:28,800 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-11 12:44:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 12:44:28,801 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:28,801 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:29,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-11 12:44:29,013 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:29,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-11 12:44:29,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:29,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023124707] [2020-10-11 12:44:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:29,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023124707] [2020-10-11 12:44:29,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140912051] [2020-10-11 12:44:29,078 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 [2020-10-11 12:44:29,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:29,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:29,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:29,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:29,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:29,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:29,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:29,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602642625] [2020-10-11 12:44:29,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:29,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:29,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:29,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:29,241 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-11 12:44:29,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:29,373 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-11 12:44:29,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:29,374 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-11 12:44:29,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:29,376 INFO L225 Difference]: With dead ends: 124 [2020-10-11 12:44:29,376 INFO L226 Difference]: Without dead ends: 118 [2020-10-11 12:44:29,376 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:44:29,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-11 12:44:29,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-11 12:44:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-11 12:44:29,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-11 12:44:29,381 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-11 12:44:29,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:29,381 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-11 12:44:29,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:29,382 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-11 12:44:29,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:29,382 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:29,382 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:29,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-11 12:44:29,595 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:29,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:29,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-11 12:44:29,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:29,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735027287] [2020-10-11 12:44:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:29,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735027287] [2020-10-11 12:44:29,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693007161] [2020-10-11 12:44:29,659 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 [2020-10-11 12:44:29,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:29,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:29,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:29,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:29,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:29,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:29,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036484429] [2020-10-11 12:44:29,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:29,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:29,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:29,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:29,792 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-11 12:44:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:29,836 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-11 12:44:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 12:44:29,837 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:29,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:29,838 INFO L225 Difference]: With dead ends: 113 [2020-10-11 12:44:29,838 INFO L226 Difference]: Without dead ends: 111 [2020-10-11 12:44:29,838 INFO L673 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 [2020-10-11 12:44:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-11 12:44:29,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-11 12:44:29,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-11 12:44:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-11 12:44:29,842 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-11 12:44:29,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:29,843 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-11 12:44:29,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-11 12:44:29,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:29,843 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:29,843 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:30,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 12:44:30,053 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:30,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:30,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-11 12:44:30,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:30,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136559280] [2020-10-11 12:44:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:30,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136559280] [2020-10-11 12:44:30,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234243706] [2020-10-11 12:44:30,114 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 [2020-10-11 12:44:30,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:30,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:30,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:30,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:30,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:30,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:30,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466512008] [2020-10-11 12:44:30,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:30,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:30,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:30,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:30,235 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-11 12:44:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:30,301 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-11 12:44:30,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:30,302 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:30,303 INFO L225 Difference]: With dead ends: 118 [2020-10-11 12:44:30,303 INFO L226 Difference]: Without dead ends: 116 [2020-10-11 12:44:30,304 INFO L673 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 [2020-10-11 12:44:30,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-11 12:44:30,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-11 12:44:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-11 12:44:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-11 12:44:30,308 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-11 12:44:30,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:30,308 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-11 12:44:30,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:30,308 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-11 12:44:30,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:30,309 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:30,309 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:30,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:30,521 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:30,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:30,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-11 12:44:30,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:30,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080102116] [2020-10-11 12:44:30,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:30,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080102116] [2020-10-11 12:44:30,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879654867] [2020-10-11 12:44:30,587 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 [2020-10-11 12:44:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:30,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:30,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:30,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:30,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:30,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733322358] [2020-10-11 12:44:30,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:30,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:30,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:30,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:30,719 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-11 12:44:30,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:30,804 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-11 12:44:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:30,805 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:30,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:30,806 INFO L225 Difference]: With dead ends: 119 [2020-10-11 12:44:30,806 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 12:44:30,807 INFO L673 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 [2020-10-11 12:44:30,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 12:44:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-11 12:44:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 12:44:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-11 12:44:30,811 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-11 12:44:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:30,812 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-11 12:44:30,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-11 12:44:30,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:30,813 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:30,813 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:31,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:31,024 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:31,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:31,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-11 12:44:31,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:31,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295290263] [2020-10-11 12:44:31,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:31,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295290263] [2020-10-11 12:44:31,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333291147] [2020-10-11 12:44:31,096 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 [2020-10-11 12:44:31,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:31,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:31,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:31,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:31,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:31,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:31,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916240347] [2020-10-11 12:44:31,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:31,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:31,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:31,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:31,217 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-11 12:44:31,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:31,272 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-11 12:44:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:31,272 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:31,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:31,273 INFO L225 Difference]: With dead ends: 122 [2020-10-11 12:44:31,273 INFO L226 Difference]: Without dead ends: 120 [2020-10-11 12:44:31,274 INFO L673 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 [2020-10-11 12:44:31,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-11 12:44:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-11 12:44:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-11 12:44:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-11 12:44:31,278 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-11 12:44:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:31,278 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-11 12:44:31,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-11 12:44:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:31,279 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:31,279 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:31,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-11 12:44:31,488 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:31,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-11 12:44:31,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:31,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443257073] [2020-10-11 12:44:31,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:31,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443257073] [2020-10-11 12:44:31,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181361035] [2020-10-11 12:44:31,551 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 [2020-10-11 12:44:31,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:31,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:31,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:31,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:31,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:31,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:31,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945837190] [2020-10-11 12:44:31,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:31,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:31,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:31,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:31,671 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-11 12:44:31,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:31,775 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-11 12:44:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:31,776 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:31,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:31,777 INFO L225 Difference]: With dead ends: 123 [2020-10-11 12:44:31,777 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 12:44:31,777 INFO L673 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 [2020-10-11 12:44:31,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 12:44:31,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-11 12:44:31,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 12:44:31,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-11 12:44:31,781 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-11 12:44:31,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:31,781 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-11 12:44:31,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:31,782 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-11 12:44:31,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:31,782 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:31,782 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:31,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:31,993 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:31,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:31,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-11 12:44:31,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:31,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419851686] [2020-10-11 12:44:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:32,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419851686] [2020-10-11 12:44:32,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798893251] [2020-10-11 12:44:32,053 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 [2020-10-11 12:44:32,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:32,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:32,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:32,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:32,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:32,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:32,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107830668] [2020-10-11 12:44:32,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:32,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:32,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:32,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:32,175 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-11 12:44:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:32,270 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-11 12:44:32,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:32,270 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:32,271 INFO L225 Difference]: With dead ends: 123 [2020-10-11 12:44:32,271 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 12:44:32,272 INFO L673 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 [2020-10-11 12:44:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 12:44:32,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-11 12:44:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-11 12:44:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-11 12:44:32,276 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-11 12:44:32,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:32,276 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-11 12:44:32,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:32,277 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-11 12:44:32,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:32,279 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:32,279 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:32,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-11 12:44:32,490 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:32,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:32,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-11 12:44:32,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:32,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748781594] [2020-10-11 12:44:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:32,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748781594] [2020-10-11 12:44:32,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296208025] [2020-10-11 12:44:32,585 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 [2020-10-11 12:44:32,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:32,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:32,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:32,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:32,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:32,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:32,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:32,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328546043] [2020-10-11 12:44:32,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:32,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:32,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:32,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:32,747 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-11 12:44:32,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:32,931 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-11 12:44:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:32,932 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:32,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:32,933 INFO L225 Difference]: With dead ends: 133 [2020-10-11 12:44:32,933 INFO L226 Difference]: Without dead ends: 128 [2020-10-11 12:44:32,934 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:44:32,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-11 12:44:32,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-11 12:44:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-11 12:44:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-11 12:44:32,938 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-11 12:44:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:32,938 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-11 12:44:32,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-11 12:44:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:32,939 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:32,939 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:33,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:33,140 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:33,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:33,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-11 12:44:33,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:33,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539997759] [2020-10-11 12:44:33,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:33,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539997759] [2020-10-11 12:44:33,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051116119] [2020-10-11 12:44:33,241 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 [2020-10-11 12:44:33,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:33,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:33,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:33,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:33,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:33,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:33,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832012844] [2020-10-11 12:44:33,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:33,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:33,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:33,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:33,370 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-11 12:44:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:33,473 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-11 12:44:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:33,473 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:33,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:33,474 INFO L225 Difference]: With dead ends: 127 [2020-10-11 12:44:33,474 INFO L226 Difference]: Without dead ends: 125 [2020-10-11 12:44:33,475 INFO L673 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 [2020-10-11 12:44:33,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-11 12:44:33,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-11 12:44:33,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 12:44:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-11 12:44:33,479 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-11 12:44:33,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:33,480 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-11 12:44:33,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:33,480 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-11 12:44:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:33,480 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:33,481 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:33,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-11 12:44:33,691 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:33,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:33,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-11 12:44:33,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:33,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82403309] [2020-10-11 12:44:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:33,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:33,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82403309] [2020-10-11 12:44:33,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216354892] [2020-10-11 12:44:33,742 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 [2020-10-11 12:44:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:33,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:33,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:33,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:33,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:33,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:33,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110178754] [2020-10-11 12:44:33,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:33,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:33,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:33,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:33,878 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-11 12:44:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:34,072 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-11 12:44:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:44:34,072 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:34,073 INFO L225 Difference]: With dead ends: 141 [2020-10-11 12:44:34,073 INFO L226 Difference]: Without dead ends: 136 [2020-10-11 12:44:34,074 INFO L673 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 [2020-10-11 12:44:34,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-11 12:44:34,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-11 12:44:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 12:44:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-11 12:44:34,078 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-11 12:44:34,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:34,078 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-11 12:44:34,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-11 12:44:34,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:34,080 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:34,080 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:34,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-11 12:44:34,289 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:34,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:34,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-11 12:44:34,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:34,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158128111] [2020-10-11 12:44:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:34,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158128111] [2020-10-11 12:44:34,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432440797] [2020-10-11 12:44:34,366 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 [2020-10-11 12:44:34,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:34,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:34,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:34,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:34,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:34,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:34,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:34,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601031193] [2020-10-11 12:44:34,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:34,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:34,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:34,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:34,497 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-11 12:44:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:34,661 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-11 12:44:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:34,661 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:34,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:34,662 INFO L225 Difference]: With dead ends: 136 [2020-10-11 12:44:34,662 INFO L226 Difference]: Without dead ends: 131 [2020-10-11 12:44:34,663 INFO L673 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 [2020-10-11 12:44:34,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-11 12:44:34,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-11 12:44:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-11 12:44:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-11 12:44:34,668 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-11 12:44:34,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:34,669 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-11 12:44:34,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:34,669 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-11 12:44:34,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:34,670 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:34,670 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:34,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-11 12:44:34,885 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:34,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:34,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-11 12:44:34,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:34,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638924753] [2020-10-11 12:44:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:34,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638924753] [2020-10-11 12:44:34,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889989237] [2020-10-11 12:44:34,973 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 [2020-10-11 12:44:35,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:35,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:35,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:35,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:35,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:35,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:35,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055167099] [2020-10-11 12:44:35,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:35,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:35,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:35,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:35,086 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-11 12:44:35,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:35,181 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-11 12:44:35,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:35,182 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:35,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:35,183 INFO L225 Difference]: With dead ends: 130 [2020-10-11 12:44:35,184 INFO L226 Difference]: Without dead ends: 128 [2020-10-11 12:44:35,184 INFO L673 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 [2020-10-11 12:44:35,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-11 12:44:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-11 12:44:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 12:44:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-11 12:44:35,188 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-11 12:44:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:35,188 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-11 12:44:35,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:35,188 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-11 12:44:35,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:35,189 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:35,189 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:35,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-11 12:44:35,398 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:35,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:35,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-11 12:44:35,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:35,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050628710] [2020-10-11 12:44:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:35,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050628710] [2020-10-11 12:44:35,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548652476] [2020-10-11 12:44:35,449 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 [2020-10-11 12:44:35,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:35,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:35,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:35,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:35,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:35,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:35,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977686488] [2020-10-11 12:44:35,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:35,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:35,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:35,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:35,569 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-11 12:44:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:35,703 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-11 12:44:35,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:44:35,703 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:35,705 INFO L225 Difference]: With dead ends: 131 [2020-10-11 12:44:35,705 INFO L226 Difference]: Without dead ends: 129 [2020-10-11 12:44:35,705 INFO L673 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 [2020-10-11 12:44:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-11 12:44:35,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-11 12:44:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-11 12:44:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-11 12:44:35,711 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-11 12:44:35,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:35,711 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-11 12:44:35,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-11 12:44:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:35,712 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:35,712 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:35,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-11 12:44:35,921 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:35,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:35,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-11 12:44:35,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:35,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743025808] [2020-10-11 12:44:35,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:35,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743025808] [2020-10-11 12:44:35,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125677399] [2020-10-11 12:44:35,968 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 [2020-10-11 12:44:36,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:36,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:36,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:36,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:36,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:36,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:36,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:36,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832393880] [2020-10-11 12:44:36,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:36,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:36,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:36,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:36,078 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-11 12:44:36,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:36,206 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-11 12:44:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:36,206 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:36,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:36,208 INFO L225 Difference]: With dead ends: 131 [2020-10-11 12:44:36,208 INFO L226 Difference]: Without dead ends: 126 [2020-10-11 12:44:36,209 INFO L673 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 [2020-10-11 12:44:36,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-11 12:44:36,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-11 12:44:36,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-11 12:44:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-11 12:44:36,213 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-11 12:44:36,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:36,213 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-11 12:44:36,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:36,213 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-11 12:44:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:36,214 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:36,214 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:36,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:36,425 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:36,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:36,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-11 12:44:36,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:36,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431696063] [2020-10-11 12:44:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:36,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431696063] [2020-10-11 12:44:36,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836969627] [2020-10-11 12:44:36,473 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 [2020-10-11 12:44:36,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:36,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:36,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:36,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:36,562 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:36,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:36,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:36,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915806763] [2020-10-11 12:44:36,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:36,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:36,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:36,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:36,570 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-11 12:44:36,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:36,779 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-11 12:44:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:44:36,780 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:36,781 INFO L225 Difference]: With dead ends: 145 [2020-10-11 12:44:36,781 INFO L226 Difference]: Without dead ends: 140 [2020-10-11 12:44:36,782 INFO L673 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 [2020-10-11 12:44:36,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-11 12:44:36,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-11 12:44:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 12:44:36,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-11 12:44:36,785 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-11 12:44:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:36,786 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-11 12:44:36,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:36,786 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-11 12:44:36,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:36,786 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:36,786 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:36,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-11 12:44:36,996 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:36,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:36,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-11 12:44:36,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:36,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084083970] [2020-10-11 12:44:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:37,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084083970] [2020-10-11 12:44:37,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535500245] [2020-10-11 12:44:37,048 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 [2020-10-11 12:44:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:37,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:44:37,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:37,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:37,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:37,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-11 12:44:37,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010079850] [2020-10-11 12:44:37,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 12:44:37,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:37,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 12:44:37,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 12:44:37,155 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-11 12:44:37,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:37,315 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-11 12:44:37,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:37,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-11 12:44:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:37,318 INFO L225 Difference]: With dead ends: 135 [2020-10-11 12:44:37,318 INFO L226 Difference]: Without dead ends: 130 [2020-10-11 12:44:37,318 INFO L673 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 [2020-10-11 12:44:37,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-11 12:44:37,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-11 12:44:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 12:44:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-11 12:44:37,322 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-11 12:44:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:37,322 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-11 12:44:37,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 12:44:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-11 12:44:37,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:37,323 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:37,323 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:37,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:37,534 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:37,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:37,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-11 12:44:37,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:37,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396387720] [2020-10-11 12:44:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:37,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396387720] [2020-10-11 12:44:37,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261597162] [2020-10-11 12:44:37,598 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 [2020-10-11 12:44:37,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:37,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:37,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:37,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:37,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:37,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:37,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-11 12:44:37,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479368322] [2020-10-11 12:44:37,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 12:44:37,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:37,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 12:44:37,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-11 12:44:37,771 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-11 12:44:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:37,880 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-11 12:44:37,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:37,880 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-11 12:44:37,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:37,881 INFO L225 Difference]: With dead ends: 143 [2020-10-11 12:44:37,881 INFO L226 Difference]: Without dead ends: 138 [2020-10-11 12:44:37,882 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:44:37,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-11 12:44:37,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-11 12:44:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-11 12:44:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-11 12:44:37,885 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-11 12:44:37,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:37,886 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-11 12:44:37,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 12:44:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-11 12:44:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:37,886 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:37,886 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:38,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-11 12:44:38,097 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:38,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-11 12:44:38,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:38,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081676711] [2020-10-11 12:44:38,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:38,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081676711] [2020-10-11 12:44:38,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309320705] [2020-10-11 12:44:38,188 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 [2020-10-11 12:44:38,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:38,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:38,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:38,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:38,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:38,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:38,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832498922] [2020-10-11 12:44:38,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:38,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:38,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:38,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:38,325 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-11 12:44:38,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:38,366 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-11 12:44:38,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:38,367 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-11 12:44:38,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:38,368 INFO L225 Difference]: With dead ends: 132 [2020-10-11 12:44:38,368 INFO L226 Difference]: Without dead ends: 129 [2020-10-11 12:44:38,368 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:38,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-11 12:44:38,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-11 12:44:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 12:44:38,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-11 12:44:38,371 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-11 12:44:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:38,372 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-11 12:44:38,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-11 12:44:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:38,372 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:38,373 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:38,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-11 12:44:38,582 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:38,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:38,582 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-11 12:44:38,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:38,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961819121] [2020-10-11 12:44:38,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:38,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961819121] [2020-10-11 12:44:38,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522210636] [2020-10-11 12:44:38,662 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 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 [2020-10-11 12:44:38,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:44:38,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:38,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:38,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:38,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:38,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:38,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179343448] [2020-10-11 12:44:38,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:38,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:38,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:38,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:38,814 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-11 12:44:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:38,880 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-11 12:44:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:38,881 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-11 12:44:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:38,882 INFO L225 Difference]: With dead ends: 143 [2020-10-11 12:44:38,883 INFO L226 Difference]: Without dead ends: 140 [2020-10-11 12:44:38,883 INFO L673 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 [2020-10-11 12:44:38,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-11 12:44:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-11 12:44:38,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 12:44:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-11 12:44:38,888 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-11 12:44:38,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:38,888 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-11 12:44:38,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:38,889 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-11 12:44:38,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:38,890 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:38,890 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:39,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-11 12:44:39,101 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:39,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:39,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-11 12:44:39,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:39,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741534386] [2020-10-11 12:44:39,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:39,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741534386] [2020-10-11 12:44:39,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075911463] [2020-10-11 12:44:39,170 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 [2020-10-11 12:44:39,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:44:39,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:39,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:39,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:39,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:39,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:39,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517649575] [2020-10-11 12:44:39,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:39,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:39,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:39,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:39,300 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-11 12:44:39,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:39,383 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-11 12:44:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:39,383 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-11 12:44:39,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:39,384 INFO L225 Difference]: With dead ends: 142 [2020-10-11 12:44:39,384 INFO L226 Difference]: Without dead ends: 139 [2020-10-11 12:44:39,385 INFO L673 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 [2020-10-11 12:44:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-11 12:44:39,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-11 12:44:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-11 12:44:39,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-11 12:44:39,389 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-11 12:44:39,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:39,389 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-11 12:44:39,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:39,389 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-11 12:44:39,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:39,390 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:39,390 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:39,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-11 12:44:39,594 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:39,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-11 12:44:39,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:39,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542395526] [2020-10-11 12:44:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:39,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542395526] [2020-10-11 12:44:39,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815368409] [2020-10-11 12:44:39,656 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 [2020-10-11 12:44:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:39,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:39,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:39,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:39,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:39,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298343548] [2020-10-11 12:44:39,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:39,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:39,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:39,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:39,774 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-11 12:44:39,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:39,860 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-11 12:44:39,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:39,860 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-11 12:44:39,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:39,861 INFO L225 Difference]: With dead ends: 141 [2020-10-11 12:44:39,862 INFO L226 Difference]: Without dead ends: 138 [2020-10-11 12:44:39,862 INFO L673 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 [2020-10-11 12:44:39,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-11 12:44:39,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-11 12:44:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-11 12:44:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-11 12:44:39,865 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-11 12:44:39,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:39,866 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-11 12:44:39,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:39,866 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-11 12:44:39,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 12:44:39,866 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:39,867 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:40,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-11 12:44:40,067 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:40,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:40,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-11 12:44:40,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:40,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297101233] [2020-10-11 12:44:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:40,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297101233] [2020-10-11 12:44:40,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882492706] [2020-10-11 12:44:40,123 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 [2020-10-11 12:44:40,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:40,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:40,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:40,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:40,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:40,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:40,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:40,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468958845] [2020-10-11 12:44:40,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:40,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:40,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:40,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:40,252 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-11 12:44:40,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:40,391 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-11 12:44:40,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:40,392 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-11 12:44:40,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:40,393 INFO L225 Difference]: With dead ends: 150 [2020-10-11 12:44:40,394 INFO L226 Difference]: Without dead ends: 144 [2020-10-11 12:44:40,394 INFO L673 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 [2020-10-11 12:44:40,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-11 12:44:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-11 12:44:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-11 12:44:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-11 12:44:40,399 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-11 12:44:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:40,399 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-11 12:44:40,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-11 12:44:40,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:40,400 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:40,400 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:40,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:40,604 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:40,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-11 12:44:40,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:40,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361164230] [2020-10-11 12:44:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:40,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361164230] [2020-10-11 12:44:40,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864346051] [2020-10-11 12:44:40,679 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 [2020-10-11 12:44:40,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:40,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:40,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:40,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:40,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:40,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:40,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084884280] [2020-10-11 12:44:40,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:40,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:40,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:40,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:40,851 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-11 12:44:40,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:40,896 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-11 12:44:40,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 12:44:40,896 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:40,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:40,897 INFO L225 Difference]: With dead ends: 138 [2020-10-11 12:44:40,898 INFO L226 Difference]: Without dead ends: 136 [2020-10-11 12:44:40,898 INFO L673 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 [2020-10-11 12:44:40,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-11 12:44:40,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-11 12:44:40,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-11 12:44:40,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-11 12:44:40,902 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-11 12:44:40,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:40,902 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-11 12:44:40,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:40,902 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-11 12:44:40,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:40,903 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:40,903 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:41,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-11 12:44:41,103 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:41,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:41,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-11 12:44:41,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:41,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293114731] [2020-10-11 12:44:41,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:41,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293114731] [2020-10-11 12:44:41,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928199737] [2020-10-11 12:44:41,165 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 [2020-10-11 12:44:41,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:41,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:41,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:41,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:41,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:41,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:41,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075674111] [2020-10-11 12:44:41,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:41,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:41,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:41,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:41,308 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-11 12:44:41,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:41,414 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-11 12:44:41,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:41,415 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:41,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:41,416 INFO L225 Difference]: With dead ends: 145 [2020-10-11 12:44:41,416 INFO L226 Difference]: Without dead ends: 143 [2020-10-11 12:44:41,417 INFO L673 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 [2020-10-11 12:44:41,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-11 12:44:41,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-11 12:44:41,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-11 12:44:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-11 12:44:41,420 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-11 12:44:41,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:41,420 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-11 12:44:41,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:41,420 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-11 12:44:41,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:41,421 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:41,421 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:41,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-11 12:44:41,630 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-11 12:44:41,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:41,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904788148] [2020-10-11 12:44:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:41,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904788148] [2020-10-11 12:44:41,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795565055] [2020-10-11 12:44:41,693 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 [2020-10-11 12:44:41,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:41,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:41,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:41,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:41,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:41,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:41,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296862461] [2020-10-11 12:44:41,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:41,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:41,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:41,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:41,813 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-11 12:44:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:41,952 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-11 12:44:41,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:41,952 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:41,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:41,954 INFO L225 Difference]: With dead ends: 150 [2020-10-11 12:44:41,954 INFO L226 Difference]: Without dead ends: 148 [2020-10-11 12:44:41,954 INFO L673 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 [2020-10-11 12:44:41,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-11 12:44:41,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-11 12:44:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-11 12:44:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-11 12:44:41,959 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-11 12:44:41,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:41,960 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-11 12:44:41,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:41,960 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-11 12:44:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:41,961 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:41,961 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:42,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:42,172 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:42,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:42,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-11 12:44:42,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:42,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303795222] [2020-10-11 12:44:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:42,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303795222] [2020-10-11 12:44:42,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127270539] [2020-10-11 12:44:42,251 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 [2020-10-11 12:44:42,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:44:42,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:42,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:42,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:42,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:42,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:42,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235635213] [2020-10-11 12:44:42,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:42,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:42,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:42,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:42,376 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-11 12:44:42,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:42,496 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-11 12:44:42,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:42,497 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:42,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:42,498 INFO L225 Difference]: With dead ends: 148 [2020-10-11 12:44:42,498 INFO L226 Difference]: Without dead ends: 146 [2020-10-11 12:44:42,498 INFO L673 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 [2020-10-11 12:44:42,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-11 12:44:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-11 12:44:42,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-11 12:44:42,501 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-11 12:44:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:42,502 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-11 12:44:42,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:42,502 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-11 12:44:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:42,503 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:42,503 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:42,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-11 12:44:42,712 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:42,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-11 12:44:42,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:42,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777444700] [2020-10-11 12:44:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:42,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777444700] [2020-10-11 12:44:42,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632349757] [2020-10-11 12:44:42,790 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 [2020-10-11 12:44:42,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:42,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:42,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:42,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:42,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:42,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:42,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951355945] [2020-10-11 12:44:42,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:42,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:42,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:42,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:42,912 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-11 12:44:43,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:43,028 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-11 12:44:43,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:43,028 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:43,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:43,030 INFO L225 Difference]: With dead ends: 149 [2020-10-11 12:44:43,030 INFO L226 Difference]: Without dead ends: 147 [2020-10-11 12:44:43,030 INFO L673 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 [2020-10-11 12:44:43,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-11 12:44:43,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-11 12:44:43,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-11 12:44:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-11 12:44:43,035 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-11 12:44:43,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:43,035 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-11 12:44:43,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:43,035 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-11 12:44:43,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:43,036 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:43,036 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:43,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:43,249 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:43,249 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-11 12:44:43,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:43,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124283527] [2020-10-11 12:44:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:43,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124283527] [2020-10-11 12:44:43,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336134430] [2020-10-11 12:44:43,334 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 [2020-10-11 12:44:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:43,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:43,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:43,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:43,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526139476] [2020-10-11 12:44:43,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:43,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:43,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:43,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:43,478 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-11 12:44:43,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:43,538 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-11 12:44:43,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:43,539 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:43,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:43,540 INFO L225 Difference]: With dead ends: 152 [2020-10-11 12:44:43,540 INFO L226 Difference]: Without dead ends: 150 [2020-10-11 12:44:43,540 INFO L673 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 [2020-10-11 12:44:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-11 12:44:43,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-11 12:44:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-11 12:44:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-11 12:44:43,544 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-11 12:44:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:43,544 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-11 12:44:43,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-11 12:44:43,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:43,545 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:43,545 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:43,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-11 12:44:43,746 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:43,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:43,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-11 12:44:43,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:43,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32080063] [2020-10-11 12:44:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:43,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32080063] [2020-10-11 12:44:43,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223092063] [2020-10-11 12:44:43,827 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 [2020-10-11 12:44:43,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:43,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:43,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:43,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:43,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:43,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:43,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259411248] [2020-10-11 12:44:43,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:43,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:43,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:43,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:43,985 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-11 12:44:44,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:44,099 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-11 12:44:44,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:44:44,100 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:44,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:44,101 INFO L225 Difference]: With dead ends: 153 [2020-10-11 12:44:44,102 INFO L226 Difference]: Without dead ends: 151 [2020-10-11 12:44:44,102 INFO L673 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 [2020-10-11 12:44:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-11 12:44:44,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-11 12:44:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:44,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-11 12:44:44,106 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-11 12:44:44,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:44,107 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-11 12:44:44,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:44,107 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-11 12:44:44,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:44,107 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:44,107 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:44,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-11 12:44:44,318 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:44,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:44,318 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-11 12:44:44,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:44,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945877436] [2020-10-11 12:44:44,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:44,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945877436] [2020-10-11 12:44:44,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532118333] [2020-10-11 12:44:44,386 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 [2020-10-11 12:44:44,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:44,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:44,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:44,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:44,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:44,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:44,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621010827] [2020-10-11 12:44:44,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:44,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:44,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:44,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:44,499 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-11 12:44:44,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:44,646 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-11 12:44:44,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:44:44,646 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:44,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:44,648 INFO L225 Difference]: With dead ends: 156 [2020-10-11 12:44:44,648 INFO L226 Difference]: Without dead ends: 154 [2020-10-11 12:44:44,648 INFO L673 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 [2020-10-11 12:44:44,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-11 12:44:44,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-11 12:44:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-11 12:44:44,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-11 12:44:44,653 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-11 12:44:44,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:44,653 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-11 12:44:44,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:44,653 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-11 12:44:44,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:44,654 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:44,654 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:44,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-11 12:44:44,865 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:44,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-11 12:44:44,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:44,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254919346] [2020-10-11 12:44:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:44,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254919346] [2020-10-11 12:44:44,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50606585] [2020-10-11 12:44:44,938 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 [2020-10-11 12:44:44,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:44,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:44,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:44,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:45,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:45,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:45,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319861241] [2020-10-11 12:44:45,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:45,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:45,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:45,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:45,061 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-11 12:44:45,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:45,141 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-11 12:44:45,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:44:45,141 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:45,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:45,142 INFO L225 Difference]: With dead ends: 148 [2020-10-11 12:44:45,143 INFO L226 Difference]: Without dead ends: 146 [2020-10-11 12:44:45,143 INFO L673 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 [2020-10-11 12:44:45,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-11 12:44:45,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-11 12:44:45,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-11 12:44:45,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-11 12:44:45,147 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-11 12:44:45,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:45,147 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-11 12:44:45,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:45,147 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-11 12:44:45,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:45,148 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:45,148 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:45,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-11 12:44:45,352 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:45,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:45,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-11 12:44:45,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:45,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769781854] [2020-10-11 12:44:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:45,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769781854] [2020-10-11 12:44:45,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912630749] [2020-10-11 12:44:45,419 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 [2020-10-11 12:44:45,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:45,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:45,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:45,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:45,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:45,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:45,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7422657] [2020-10-11 12:44:45,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:45,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:45,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:45,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:45,573 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-11 12:44:45,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:45,721 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-11 12:44:45,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:45,722 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:45,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:45,723 INFO L225 Difference]: With dead ends: 157 [2020-10-11 12:44:45,723 INFO L226 Difference]: Without dead ends: 155 [2020-10-11 12:44:45,723 INFO L673 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 [2020-10-11 12:44:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-11 12:44:45,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-11 12:44:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:45,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-11 12:44:45,726 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-11 12:44:45,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:45,727 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-11 12:44:45,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:45,727 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-11 12:44:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:45,727 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:45,727 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:45,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:45,936 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:45,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:45,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-11 12:44:45,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:45,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975764697] [2020-10-11 12:44:45,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:45,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975764697] [2020-10-11 12:44:45,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936579127] [2020-10-11 12:44:45,999 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 [2020-10-11 12:44:46,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:46,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:46,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:44:46,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:46,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:46,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 12:44:46,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494865726] [2020-10-11 12:44:46,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 12:44:46,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:46,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 12:44:46,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 12:44:46,084 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-10-11 12:44:46,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:46,193 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-11 12:44:46,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:44:46,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-11 12:44:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:46,195 INFO L225 Difference]: With dead ends: 149 [2020-10-11 12:44:46,196 INFO L226 Difference]: Without dead ends: 147 [2020-10-11 12:44:46,196 INFO L673 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 [2020-10-11 12:44:46,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-11 12:44:46,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-11 12:44:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-11 12:44:46,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-11 12:44:46,202 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-11 12:44:46,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:46,203 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-11 12:44:46,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 12:44:46,203 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-11 12:44:46,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:46,204 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:46,204 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:46,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-11 12:44:46,417 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:46,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:46,418 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-11 12:44:46,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:46,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212710524] [2020-10-11 12:44:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:46,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212710524] [2020-10-11 12:44:46,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526249142] [2020-10-11 12:44:46,492 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 [2020-10-11 12:44:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:46,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:46,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:46,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:46,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:46,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:46,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392428244] [2020-10-11 12:44:46,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:46,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:46,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:46,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:46,716 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-11 12:44:46,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:46,960 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-11 12:44:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:46,960 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:46,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:46,962 INFO L225 Difference]: With dead ends: 164 [2020-10-11 12:44:46,962 INFO L226 Difference]: Without dead ends: 159 [2020-10-11 12:44:46,962 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:44:46,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-11 12:44:46,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-11 12:44:46,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-11 12:44:46,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-11 12:44:46,968 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-11 12:44:46,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:46,968 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-11 12:44:46,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:46,968 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-11 12:44:46,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:46,969 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:46,969 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:47,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-11 12:44:47,171 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:47,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:47,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-11 12:44:47,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:47,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581809682] [2020-10-11 12:44:47,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:47,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581809682] [2020-10-11 12:44:47,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907768067] [2020-10-11 12:44:47,230 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 [2020-10-11 12:44:47,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:47,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:47,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:47,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:47,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:47,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:47,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400843975] [2020-10-11 12:44:47,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:47,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:47,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:47,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:47,388 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-11 12:44:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:47,579 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-11 12:44:47,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:44:47,580 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:47,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:47,582 INFO L225 Difference]: With dead ends: 156 [2020-10-11 12:44:47,582 INFO L226 Difference]: Without dead ends: 154 [2020-10-11 12:44:47,582 INFO L673 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 [2020-10-11 12:44:47,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-11 12:44:47,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-11 12:44:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-11 12:44:47,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-11 12:44:47,586 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-11 12:44:47,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:47,586 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-11 12:44:47,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:47,586 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-11 12:44:47,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:47,587 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:47,587 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:47,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:47,791 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:47,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:47,791 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-11 12:44:47,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:47,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411158558] [2020-10-11 12:44:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:47,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411158558] [2020-10-11 12:44:47,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335815589] [2020-10-11 12:44:47,847 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 [2020-10-11 12:44:47,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:47,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:47,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:47,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:47,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:48,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:48,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:48,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418465822] [2020-10-11 12:44:48,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:48,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:48,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:48,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:48,002 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-11 12:44:48,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:48,350 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-11 12:44:48,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:44:48,351 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:48,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:48,352 INFO L225 Difference]: With dead ends: 176 [2020-10-11 12:44:48,352 INFO L226 Difference]: Without dead ends: 171 [2020-10-11 12:44:48,353 INFO L673 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 [2020-10-11 12:44:48,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-11 12:44:48,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-11 12:44:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-11 12:44:48,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-11 12:44:48,357 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-11 12:44:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:48,357 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-11 12:44:48,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:48,357 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-11 12:44:48,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:48,358 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:48,358 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:48,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-11 12:44:48,568 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:48,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:48,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-11 12:44:48,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:48,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597499709] [2020-10-11 12:44:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:48,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597499709] [2020-10-11 12:44:48,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334929028] [2020-10-11 12:44:48,624 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 [2020-10-11 12:44:48,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:48,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:48,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:48,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:48,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:48,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:48,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:48,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717587855] [2020-10-11 12:44:48,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:48,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:48,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:48,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:48,805 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-11 12:44:49,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:49,044 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-11 12:44:49,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:49,045 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:49,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:49,047 INFO L225 Difference]: With dead ends: 166 [2020-10-11 12:44:49,047 INFO L226 Difference]: Without dead ends: 161 [2020-10-11 12:44:49,047 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:44:49,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-11 12:44:49,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-11 12:44:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-11 12:44:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-11 12:44:49,051 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-11 12:44:49,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:49,051 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-11 12:44:49,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:49,052 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-11 12:44:49,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:49,052 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:49,052 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:49,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:49,262 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:49,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:49,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-11 12:44:49,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:49,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69789452] [2020-10-11 12:44:49,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:49,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69789452] [2020-10-11 12:44:49,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855314428] [2020-10-11 12:44:49,314 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 [2020-10-11 12:44:49,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:49,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:49,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:49,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:49,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:49,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:49,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683179560] [2020-10-11 12:44:49,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:49,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:49,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:49,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:49,440 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-11 12:44:49,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:49,602 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-11 12:44:49,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:49,603 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:49,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:49,605 INFO L225 Difference]: With dead ends: 163 [2020-10-11 12:44:49,605 INFO L226 Difference]: Without dead ends: 161 [2020-10-11 12:44:49,606 INFO L673 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 [2020-10-11 12:44:49,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-11 12:44:49,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-11 12:44:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-11 12:44:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-11 12:44:49,611 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-11 12:44:49,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:49,611 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-11 12:44:49,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-11 12:44:49,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:49,612 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:49,612 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:49,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-11 12:44:49,824 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:49,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-11 12:44:49,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:49,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247635280] [2020-10-11 12:44:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:49,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247635280] [2020-10-11 12:44:49,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907189331] [2020-10-11 12:44:49,894 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 [2020-10-11 12:44:49,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:49,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:49,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:49,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:50,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:50,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:50,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263811637] [2020-10-11 12:44:50,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:50,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:50,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:50,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:50,048 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-11 12:44:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:50,282 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-11 12:44:50,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:44:50,283 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:50,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:50,284 INFO L225 Difference]: With dead ends: 170 [2020-10-11 12:44:50,284 INFO L226 Difference]: Without dead ends: 168 [2020-10-11 12:44:50,285 INFO L673 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 [2020-10-11 12:44:50,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-11 12:44:50,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-11 12:44:50,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-11 12:44:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-11 12:44:50,289 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-11 12:44:50,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:50,289 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-11 12:44:50,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-11 12:44:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:50,290 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:50,290 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:50,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:50,500 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:50,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:50,500 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-11 12:44:50,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:50,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237441802] [2020-10-11 12:44:50,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:50,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237441802] [2020-10-11 12:44:50,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875473172] [2020-10-11 12:44:50,552 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 [2020-10-11 12:44:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:50,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:50,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:50,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:50,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:50,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:50,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701241748] [2020-10-11 12:44:50,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:50,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:50,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:50,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:50,692 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-11 12:44:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:50,997 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-11 12:44:50,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:44:50,997 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:50,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:50,998 INFO L225 Difference]: With dead ends: 177 [2020-10-11 12:44:50,998 INFO L226 Difference]: Without dead ends: 172 [2020-10-11 12:44:50,999 INFO L673 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 [2020-10-11 12:44:50,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-11 12:44:51,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-11 12:44:51,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-11 12:44:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-11 12:44:51,002 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-11 12:44:51,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:51,003 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-11 12:44:51,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:51,003 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-11 12:44:51,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:51,003 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:51,003 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:51,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-11 12:44:51,214 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:51,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:51,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-11 12:44:51,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:51,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738287258] [2020-10-11 12:44:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:51,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738287258] [2020-10-11 12:44:51,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548668043] [2020-10-11 12:44:51,269 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 [2020-10-11 12:44:51,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:51,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:51,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:51,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:51,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:51,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:51,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:51,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132605427] [2020-10-11 12:44:51,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:51,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:51,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:51,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:51,386 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-11 12:44:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:51,731 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-11 12:44:51,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:44:51,732 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:51,734 INFO L225 Difference]: With dead ends: 190 [2020-10-11 12:44:51,734 INFO L226 Difference]: Without dead ends: 182 [2020-10-11 12:44:51,734 INFO L673 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 [2020-10-11 12:44:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-11 12:44:51,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-11 12:44:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-11 12:44:51,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-11 12:44:51,737 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-11 12:44:51,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:51,737 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-11 12:44:51,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:51,737 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-11 12:44:51,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:51,738 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:51,738 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:51,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-11 12:44:51,939 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:51,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:51,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-11 12:44:51,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:51,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929934273] [2020-10-11 12:44:51,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:51,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929934273] [2020-10-11 12:44:51,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533456404] [2020-10-11 12:44:51,997 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 [2020-10-11 12:44:52,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:44:52,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:52,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:52,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:52,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:52,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:52,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:52,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193403699] [2020-10-11 12:44:52,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:52,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:52,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:52,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:52,121 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-11 12:44:52,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:52,460 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-11 12:44:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:44:52,460 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:52,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:52,462 INFO L225 Difference]: With dead ends: 180 [2020-10-11 12:44:52,462 INFO L226 Difference]: Without dead ends: 175 [2020-10-11 12:44:52,462 INFO L673 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 [2020-10-11 12:44:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-11 12:44:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-11 12:44:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-11 12:44:52,466 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-11 12:44:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:52,466 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-11 12:44:52,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-11 12:44:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:52,467 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:52,467 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:52,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-11 12:44:52,668 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:52,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:52,668 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-11 12:44:52,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:52,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557691973] [2020-10-11 12:44:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:52,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557691973] [2020-10-11 12:44:52,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5143844] [2020-10-11 12:44:52,729 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 [2020-10-11 12:44:52,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:52,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:52,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:52,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:52,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:52,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:52,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642354698] [2020-10-11 12:44:52,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:52,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:52,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:52,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:52,885 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-11 12:44:53,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:53,030 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-11 12:44:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:53,031 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:53,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:53,032 INFO L225 Difference]: With dead ends: 164 [2020-10-11 12:44:53,032 INFO L226 Difference]: Without dead ends: 162 [2020-10-11 12:44:53,033 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:44:53,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-11 12:44:53,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-11 12:44:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-11 12:44:53,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-11 12:44:53,036 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-11 12:44:53,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:53,036 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-11 12:44:53,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:53,037 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-11 12:44:53,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:53,037 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:53,037 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:53,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-11 12:44:53,240 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:53,240 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-11 12:44:53,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:53,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455596680] [2020-10-11 12:44:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:53,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455596680] [2020-10-11 12:44:53,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245215207] [2020-10-11 12:44:53,297 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 [2020-10-11 12:44:53,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:53,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:53,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:53,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:53,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:53,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:53,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027654180] [2020-10-11 12:44:53,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:53,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:53,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:53,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:53,417 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-11 12:44:53,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:53,569 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-11 12:44:53,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:44:53,570 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:53,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:53,571 INFO L225 Difference]: With dead ends: 161 [2020-10-11 12:44:53,571 INFO L226 Difference]: Without dead ends: 159 [2020-10-11 12:44:53,572 INFO L673 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 [2020-10-11 12:44:53,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-11 12:44:53,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-11 12:44:53,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-11 12:44:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-11 12:44:53,575 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-11 12:44:53,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:53,575 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-11 12:44:53,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:53,575 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-11 12:44:53,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:53,575 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:53,575 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:53,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-11 12:44:53,780 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:53,780 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-11 12:44:53,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:53,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008207300] [2020-10-11 12:44:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:53,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008207300] [2020-10-11 12:44:53,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181175912] [2020-10-11 12:44:53,831 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 [2020-10-11 12:44:53,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:44:53,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:53,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:53,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:53,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:53,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:53,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167248119] [2020-10-11 12:44:53,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:53,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:53,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:53,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:53,980 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-11 12:44:54,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:54,177 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-11 12:44:54,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:44:54,178 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:54,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:54,179 INFO L225 Difference]: With dead ends: 165 [2020-10-11 12:44:54,179 INFO L226 Difference]: Without dead ends: 163 [2020-10-11 12:44:54,179 INFO L673 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 [2020-10-11 12:44:54,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-11 12:44:54,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-11 12:44:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-11 12:44:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-11 12:44:54,185 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-11 12:44:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:54,185 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-11 12:44:54,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-11 12:44:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:54,187 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:54,187 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:54,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-11 12:44:54,402 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:54,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:54,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-11 12:44:54,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:54,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728142426] [2020-10-11 12:44:54,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:54,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728142426] [2020-10-11 12:44:54,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855704390] [2020-10-11 12:44:54,464 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 [2020-10-11 12:44:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:54,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:54,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:54,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:54,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:54,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363478830] [2020-10-11 12:44:54,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:54,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:54,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:54,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:54,615 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-11 12:44:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:54,805 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-11 12:44:54,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:44:54,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:54,807 INFO L225 Difference]: With dead ends: 167 [2020-10-11 12:44:54,807 INFO L226 Difference]: Without dead ends: 165 [2020-10-11 12:44:54,808 INFO L673 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 [2020-10-11 12:44:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-11 12:44:54,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-11 12:44:54,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-11 12:44:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-11 12:44:54,811 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-11 12:44:54,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:54,811 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-11 12:44:54,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:54,812 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-11 12:44:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:54,812 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:54,812 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:55,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:55,019 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:55,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:55,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-11 12:44:55,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:55,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840029776] [2020-10-11 12:44:55,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:55,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840029776] [2020-10-11 12:44:55,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119749485] [2020-10-11 12:44:55,075 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 [2020-10-11 12:44:55,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:55,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:55,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:55,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:55,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:55,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:55,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250112879] [2020-10-11 12:44:55,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:55,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:55,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:55,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:55,211 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-11 12:44:55,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:55,463 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-11 12:44:55,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:44:55,464 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:55,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:55,465 INFO L225 Difference]: With dead ends: 168 [2020-10-11 12:44:55,466 INFO L226 Difference]: Without dead ends: 166 [2020-10-11 12:44:55,466 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:44:55,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-11 12:44:55,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-11 12:44:55,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:55,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-11 12:44:55,469 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-11 12:44:55,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:55,469 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-11 12:44:55,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:55,469 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-11 12:44:55,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:55,469 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:55,470 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:55,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:55,671 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:55,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:55,671 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-11 12:44:55,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:55,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883791832] [2020-10-11 12:44:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:55,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883791832] [2020-10-11 12:44:55,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966888976] [2020-10-11 12:44:55,729 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 [2020-10-11 12:44:55,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:44:55,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:55,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:55,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:55,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:55,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:55,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:55,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55034569] [2020-10-11 12:44:55,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:55,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:55,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:55,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:55,847 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-11 12:44:56,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:56,035 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-11 12:44:56,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:44:56,036 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:56,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:56,037 INFO L225 Difference]: With dead ends: 160 [2020-10-11 12:44:56,037 INFO L226 Difference]: Without dead ends: 155 [2020-10-11 12:44:56,038 INFO L673 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 [2020-10-11 12:44:56,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-11 12:44:56,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-11 12:44:56,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-11 12:44:56,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-11 12:44:56,041 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-11 12:44:56,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:56,041 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-11 12:44:56,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:56,041 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-11 12:44:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:56,042 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:56,042 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:56,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:56,248 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:56,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:56,248 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-11 12:44:56,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:56,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221796727] [2020-10-11 12:44:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:56,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221796727] [2020-10-11 12:44:56,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500684833] [2020-10-11 12:44:56,308 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 [2020-10-11 12:44:56,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:44:56,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:56,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:56,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:56,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:56,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:56,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:56,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474127859] [2020-10-11 12:44:56,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:56,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:56,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:56,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:56,450 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-11 12:44:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:56,776 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-11 12:44:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:44:56,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:56,778 INFO L225 Difference]: With dead ends: 189 [2020-10-11 12:44:56,778 INFO L226 Difference]: Without dead ends: 181 [2020-10-11 12:44:56,778 INFO L673 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 [2020-10-11 12:44:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-11 12:44:56,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-11 12:44:56,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-11 12:44:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-11 12:44:56,782 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-11 12:44:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:56,782 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-11 12:44:56,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:56,783 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-11 12:44:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:56,783 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:56,783 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:56,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:56,984 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:56,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:56,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-11 12:44:56,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:56,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988871126] [2020-10-11 12:44:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:57,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988871126] [2020-10-11 12:44:57,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852736629] [2020-10-11 12:44:57,040 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 [2020-10-11 12:44:57,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:44:57,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:57,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:57,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:57,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:57,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:57,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062964637] [2020-10-11 12:44:57,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:57,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:57,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:57,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:57,166 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-11 12:44:57,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:57,400 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-11 12:44:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:44:57,400 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:57,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:57,402 INFO L225 Difference]: With dead ends: 169 [2020-10-11 12:44:57,402 INFO L226 Difference]: Without dead ends: 167 [2020-10-11 12:44:57,402 INFO L673 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 [2020-10-11 12:44:57,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-11 12:44:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-11 12:44:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-11 12:44:57,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-11 12:44:57,405 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-11 12:44:57,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:57,406 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-11 12:44:57,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:57,406 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-11 12:44:57,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:57,406 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:57,406 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:57,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-11 12:44:57,607 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:57,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:57,608 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-11 12:44:57,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:57,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321341012] [2020-10-11 12:44:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:57,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321341012] [2020-10-11 12:44:57,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351775171] [2020-10-11 12:44:57,663 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 [2020-10-11 12:44:57,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:44:57,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:57,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:57,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:57,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:57,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:57,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:57,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885928888] [2020-10-11 12:44:57,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:57,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:57,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:57,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:57,797 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-11 12:44:58,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:58,124 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-11 12:44:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:44:58,124 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:58,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:58,126 INFO L225 Difference]: With dead ends: 192 [2020-10-11 12:44:58,126 INFO L226 Difference]: Without dead ends: 184 [2020-10-11 12:44:58,126 INFO L673 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 [2020-10-11 12:44:58,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-11 12:44:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-11 12:44:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-11 12:44:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-11 12:44:58,129 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-11 12:44:58,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:58,130 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-11 12:44:58,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:58,130 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-11 12:44:58,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:58,131 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:58,131 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:58,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:58,334 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:58,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:58,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-11 12:44:58,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:58,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174050633] [2020-10-11 12:44:58,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:58,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174050633] [2020-10-11 12:44:58,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809168376] [2020-10-11 12:44:58,389 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 [2020-10-11 12:44:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:58,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 12:44:58,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:58,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:44:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:58,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:58,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-11 12:44:58,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756961624] [2020-10-11 12:44:58,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 12:44:58,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:58,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 12:44:58,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 12:44:58,510 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-11 12:44:58,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:58,827 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-11 12:44:58,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:44:58,828 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-11 12:44:58,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:58,829 INFO L225 Difference]: With dead ends: 180 [2020-10-11 12:44:58,829 INFO L226 Difference]: Without dead ends: 175 [2020-10-11 12:44:58,830 INFO L673 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 [2020-10-11 12:44:58,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-11 12:44:58,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-11 12:44:58,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-11 12:44:58,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-11 12:44:58,833 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-11 12:44:58,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:58,833 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-11 12:44:58,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 12:44:58,834 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-11 12:44:58,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:58,834 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:58,834 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:59,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-11 12:44:59,037 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:59,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:59,038 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-11 12:44:59,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:59,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723919622] [2020-10-11 12:44:59,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:59,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723919622] [2020-10-11 12:44:59,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851793120] [2020-10-11 12:44:59,110 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 [2020-10-11 12:44:59,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:44:59,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:59,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:44:59,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:59,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:44:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:59,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:59,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-11 12:44:59,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761857322] [2020-10-11 12:44:59,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 12:44:59,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:59,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 12:44:59,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:44:59,268 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-11 12:44:59,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:59,412 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-11 12:44:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:44:59,412 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-11 12:44:59,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:59,413 INFO L225 Difference]: With dead ends: 164 [2020-10-11 12:44:59,414 INFO L226 Difference]: Without dead ends: 159 [2020-10-11 12:44:59,414 INFO L673 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 [2020-10-11 12:44:59,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-11 12:44:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-11 12:44:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-11 12:44:59,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-11 12:44:59,417 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-11 12:44:59,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:59,417 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-11 12:44:59,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 12:44:59,417 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-11 12:44:59,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:59,418 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:59,418 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:44:59,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:44:59,627 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:44:59,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:44:59,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-11 12:44:59,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:44:59,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626991204] [2020-10-11 12:44:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:44:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:44:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:59,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626991204] [2020-10-11 12:44:59,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200686893] [2020-10-11 12:44:59,731 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 [2020-10-11 12:44:59,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:44:59,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:44:59,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:44:59,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:44:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:44:59,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:44:59,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:44:59,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342728553] [2020-10-11 12:44:59,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:44:59,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:44:59,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:44:59,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:44:59,898 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-11 12:44:59,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:44:59,949 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-11 12:44:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:44:59,950 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:44:59,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:44:59,951 INFO L225 Difference]: With dead ends: 156 [2020-10-11 12:44:59,951 INFO L226 Difference]: Without dead ends: 153 [2020-10-11 12:44:59,952 INFO L673 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 [2020-10-11 12:44:59,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-11 12:44:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-11 12:44:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-11 12:44:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-11 12:44:59,956 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-11 12:44:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:44:59,956 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-11 12:44:59,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:44:59,956 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-11 12:44:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:44:59,957 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:44:59,957 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:00,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-11 12:45:00,167 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:00,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:00,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-11 12:45:00,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:00,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708339379] [2020-10-11 12:45:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:00,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708339379] [2020-10-11 12:45:00,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939857537] [2020-10-11 12:45:00,272 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 [2020-10-11 12:45:00,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:00,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:00,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:00,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:00,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:00,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:00,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668254293] [2020-10-11 12:45:00,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:00,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:00,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:00,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:00,437 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-11 12:45:00,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:00,496 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-11 12:45:00,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:45:00,497 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:45:00,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:00,498 INFO L225 Difference]: With dead ends: 170 [2020-10-11 12:45:00,498 INFO L226 Difference]: Without dead ends: 167 [2020-10-11 12:45:00,498 INFO L673 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 [2020-10-11 12:45:00,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-11 12:45:00,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-11 12:45:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-11 12:45:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-11 12:45:00,501 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-11 12:45:00,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:00,501 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-11 12:45:00,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:00,502 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-11 12:45:00,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:45:00,502 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:00,502 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:00,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:00,703 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:00,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:00,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-11 12:45:00,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:00,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030622927] [2020-10-11 12:45:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:00,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030622927] [2020-10-11 12:45:00,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795254153] [2020-10-11 12:45:00,794 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 [2020-10-11 12:45:00,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:00,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:00,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:00,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:00,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:00,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:00,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586373632] [2020-10-11 12:45:00,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:00,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:00,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:00,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:00,946 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-11 12:45:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:01,030 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-11 12:45:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:45:01,031 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:45:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:01,032 INFO L225 Difference]: With dead ends: 169 [2020-10-11 12:45:01,032 INFO L226 Difference]: Without dead ends: 166 [2020-10-11 12:45:01,033 INFO L673 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 [2020-10-11 12:45:01,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-11 12:45:01,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-11 12:45:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-11 12:45:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-11 12:45:01,036 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-11 12:45:01,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:01,036 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-11 12:45:01,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-11 12:45:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:45:01,037 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:01,037 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:01,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:01,244 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:01,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:01,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-11 12:45:01,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:01,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148035316] [2020-10-11 12:45:01,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:01,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148035316] [2020-10-11 12:45:01,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110304778] [2020-10-11 12:45:01,324 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 [2020-10-11 12:45:01,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:45:01,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:01,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:01,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:01,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:01,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:01,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463682671] [2020-10-11 12:45:01,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:01,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:01,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:01,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:01,495 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-11 12:45:01,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:01,593 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-11 12:45:01,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:45:01,593 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:45:01,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:01,594 INFO L225 Difference]: With dead ends: 168 [2020-10-11 12:45:01,595 INFO L226 Difference]: Without dead ends: 165 [2020-10-11 12:45:01,595 INFO L673 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 [2020-10-11 12:45:01,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-11 12:45:01,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-11 12:45:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-11 12:45:01,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-11 12:45:01,598 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-11 12:45:01,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:01,598 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-11 12:45:01,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-11 12:45:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:45:01,599 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:01,599 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:01,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-11 12:45:01,809 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:01,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:01,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-11 12:45:01,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:01,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812731363] [2020-10-11 12:45:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:01,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812731363] [2020-10-11 12:45:01,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891992751] [2020-10-11 12:45:01,884 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 [2020-10-11 12:45:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:01,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:01,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:02,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:02,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:02,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172515933] [2020-10-11 12:45:02,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:02,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:02,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:02,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:02,033 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-11 12:45:02,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:02,160 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-11 12:45:02,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:02,161 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:45:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:02,162 INFO L225 Difference]: With dead ends: 167 [2020-10-11 12:45:02,162 INFO L226 Difference]: Without dead ends: 164 [2020-10-11 12:45:02,163 INFO L673 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 [2020-10-11 12:45:02,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-11 12:45:02,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-11 12:45:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-11 12:45:02,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-11 12:45:02,166 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-11 12:45:02,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:02,166 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-11 12:45:02,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:02,166 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-11 12:45:02,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 12:45:02,166 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:02,166 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:02,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:02,377 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:02,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:02,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-11 12:45:02,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:02,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930475864] [2020-10-11 12:45:02,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:02,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930475864] [2020-10-11 12:45:02,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079600083] [2020-10-11 12:45:02,448 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 [2020-10-11 12:45:02,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:02,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:02,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:02,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:02,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:02,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:02,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:02,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189765222] [2020-10-11 12:45:02,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:02,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:02,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:02,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:02,596 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-11 12:45:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:02,803 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-11 12:45:02,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:02,804 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-11 12:45:02,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:02,806 INFO L225 Difference]: With dead ends: 176 [2020-10-11 12:45:02,806 INFO L226 Difference]: Without dead ends: 170 [2020-10-11 12:45:02,806 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:02,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-11 12:45:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-11 12:45:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-11 12:45:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-11 12:45:02,811 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-11 12:45:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:02,811 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-11 12:45:02,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:02,812 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-11 12:45:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:02,812 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:02,813 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:03,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:03,013 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:03,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:03,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-11 12:45:03,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:03,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729689572] [2020-10-11 12:45:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:03,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729689572] [2020-10-11 12:45:03,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92291272] [2020-10-11 12:45:03,130 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 [2020-10-11 12:45:03,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:03,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:03,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:03,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:03,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:03,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:03,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39169794] [2020-10-11 12:45:03,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:03,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:03,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:03,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:03,362 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-11 12:45:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:03,431 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-11 12:45:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:45:03,431 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:03,433 INFO L225 Difference]: With dead ends: 163 [2020-10-11 12:45:03,433 INFO L226 Difference]: Without dead ends: 161 [2020-10-11 12:45:03,434 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:03,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-11 12:45:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-11 12:45:03,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-11 12:45:03,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-11 12:45:03,439 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-11 12:45:03,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:03,439 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-11 12:45:03,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:03,439 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-11 12:45:03,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:03,440 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:03,440 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:03,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-11 12:45:03,652 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:03,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:03,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-11 12:45:03,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:03,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578519438] [2020-10-11 12:45:03,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:03,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578519438] [2020-10-11 12:45:03,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958223239] [2020-10-11 12:45:03,775 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 [2020-10-11 12:45:03,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:03,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:03,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:03,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:04,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:04,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:04,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395549059] [2020-10-11 12:45:04,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:04,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:04,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:04,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:04,016 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-11 12:45:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:04,151 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-11 12:45:04,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:45:04,152 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:04,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:04,153 INFO L225 Difference]: With dead ends: 172 [2020-10-11 12:45:04,153 INFO L226 Difference]: Without dead ends: 170 [2020-10-11 12:45:04,153 INFO L673 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 [2020-10-11 12:45:04,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-11 12:45:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-11 12:45:04,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-11 12:45:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-11 12:45:04,157 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-11 12:45:04,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:04,157 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-11 12:45:04,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:04,157 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-11 12:45:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:04,158 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:04,158 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:04,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:04,367 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:04,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:04,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-11 12:45:04,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:04,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495725107] [2020-10-11 12:45:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:04,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495725107] [2020-10-11 12:45:04,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410465576] [2020-10-11 12:45:04,446 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 [2020-10-11 12:45:04,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:04,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:04,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:04,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:05,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:05,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:05,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082044671] [2020-10-11 12:45:05,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:05,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:05,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:05,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:05,726 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-11 12:45:05,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:05,927 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-11 12:45:05,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:45:05,928 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:05,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:05,929 INFO L225 Difference]: With dead ends: 179 [2020-10-11 12:45:05,929 INFO L226 Difference]: Without dead ends: 177 [2020-10-11 12:45:05,930 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:45:05,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-11 12:45:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-11 12:45:05,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-11 12:45:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-11 12:45:05,933 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-11 12:45:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:05,933 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-11 12:45:05,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-11 12:45:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:05,934 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:05,934 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:06,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-11 12:45:06,139 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:06,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:06,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-11 12:45:06,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:06,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559623868] [2020-10-11 12:45:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:06,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559623868] [2020-10-11 12:45:06,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066596988] [2020-10-11 12:45:06,212 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 [2020-10-11 12:45:06,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:06,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:06,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:06,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:06,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:06,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:06,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99860844] [2020-10-11 12:45:06,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:06,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:06,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:06,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:06,367 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-11 12:45:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:06,571 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-11 12:45:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:45:06,572 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:06,573 INFO L225 Difference]: With dead ends: 179 [2020-10-11 12:45:06,574 INFO L226 Difference]: Without dead ends: 177 [2020-10-11 12:45:06,574 INFO L673 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 [2020-10-11 12:45:06,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-11 12:45:06,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-11 12:45:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-11 12:45:06,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-11 12:45:06,578 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-11 12:45:06,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:06,579 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-11 12:45:06,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:06,579 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-11 12:45:06,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:06,579 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:06,580 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:06,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-11 12:45:06,791 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:06,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:06,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-11 12:45:06,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:06,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733392357] [2020-10-11 12:45:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:06,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733392357] [2020-10-11 12:45:06,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364352789] [2020-10-11 12:45:06,869 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 [2020-10-11 12:45:06,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:06,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:06,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:06,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:07,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:07,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:07,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445357020] [2020-10-11 12:45:07,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:07,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:07,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:07,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:07,010 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-11 12:45:07,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:07,209 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-11 12:45:07,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:07,209 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:07,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:07,211 INFO L225 Difference]: With dead ends: 184 [2020-10-11 12:45:07,211 INFO L226 Difference]: Without dead ends: 182 [2020-10-11 12:45:07,211 INFO L673 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 [2020-10-11 12:45:07,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-11 12:45:07,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-11 12:45:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-11 12:45:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-11 12:45:07,214 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-11 12:45:07,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:07,214 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-11 12:45:07,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:07,215 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-11 12:45:07,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:07,215 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:07,215 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:07,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-11 12:45:07,416 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:07,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:07,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-11 12:45:07,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:07,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565819261] [2020-10-11 12:45:07,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:07,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565819261] [2020-10-11 12:45:07,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377804063] [2020-10-11 12:45:07,498 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 [2020-10-11 12:45:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:07,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:07,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:07,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:07,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:07,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337925728] [2020-10-11 12:45:07,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:07,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:07,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:07,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:07,653 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-11 12:45:07,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:07,872 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-11 12:45:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:07,872 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:07,874 INFO L225 Difference]: With dead ends: 179 [2020-10-11 12:45:07,874 INFO L226 Difference]: Without dead ends: 177 [2020-10-11 12:45:07,874 INFO L673 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 [2020-10-11 12:45:07,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-11 12:45:07,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-11 12:45:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-11 12:45:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-11 12:45:07,878 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-11 12:45:07,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:07,878 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-11 12:45:07,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:07,878 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-11 12:45:07,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:07,879 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:07,879 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:08,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:08,086 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:08,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:08,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-11 12:45:08,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:08,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802611865] [2020-10-11 12:45:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:08,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802611865] [2020-10-11 12:45:08,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716096524] [2020-10-11 12:45:08,174 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 [2020-10-11 12:45:08,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:08,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:08,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:08,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:08,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:08,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:08,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313964595] [2020-10-11 12:45:08,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:08,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:08,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:08,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:08,326 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-11 12:45:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:08,478 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-11 12:45:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:45:08,479 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:08,480 INFO L225 Difference]: With dead ends: 176 [2020-10-11 12:45:08,480 INFO L226 Difference]: Without dead ends: 174 [2020-10-11 12:45:08,481 INFO L673 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 [2020-10-11 12:45:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-11 12:45:08,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-11 12:45:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:45:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-11 12:45:08,484 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-11 12:45:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:08,484 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-11 12:45:08,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:08,485 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-11 12:45:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:08,485 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:08,485 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:08,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:08,695 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:08,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:08,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-11 12:45:08,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:08,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939187528] [2020-10-11 12:45:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:08,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939187528] [2020-10-11 12:45:08,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072552816] [2020-10-11 12:45:08,780 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 [2020-10-11 12:45:08,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:45:08,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:08,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:08,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:08,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:08,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:08,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891578624] [2020-10-11 12:45:08,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:08,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:08,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:08,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:08,942 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-11 12:45:09,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:09,145 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-11 12:45:09,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:09,146 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:09,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:09,147 INFO L225 Difference]: With dead ends: 185 [2020-10-11 12:45:09,147 INFO L226 Difference]: Without dead ends: 183 [2020-10-11 12:45:09,148 INFO L673 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 [2020-10-11 12:45:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-11 12:45:09,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-11 12:45:09,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:45:09,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-11 12:45:09,151 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-11 12:45:09,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:09,151 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-11 12:45:09,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:09,151 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-11 12:45:09,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:09,152 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:09,152 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:09,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:09,353 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:09,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:09,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-11 12:45:09,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:09,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024146206] [2020-10-11 12:45:09,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:09,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024146206] [2020-10-11 12:45:09,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950915894] [2020-10-11 12:45:09,445 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 [2020-10-11 12:45:09,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:09,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:09,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:09,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:09,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:09,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:09,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200957641] [2020-10-11 12:45:09,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:09,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:09,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:09,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:09,589 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-11 12:45:09,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:09,783 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-11 12:45:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:09,784 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:09,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:09,785 INFO L225 Difference]: With dead ends: 185 [2020-10-11 12:45:09,785 INFO L226 Difference]: Without dead ends: 183 [2020-10-11 12:45:09,785 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:45:09,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-11 12:45:09,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-11 12:45:09,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-11 12:45:09,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-11 12:45:09,790 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-11 12:45:09,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:09,790 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-11 12:45:09,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-11 12:45:09,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:09,791 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:09,791 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:09,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:09,999 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:10,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:10,003 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-11 12:45:10,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:10,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062317745] [2020-10-11 12:45:10,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:10,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062317745] [2020-10-11 12:45:10,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531017143] [2020-10-11 12:45:10,155 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 [2020-10-11 12:45:10,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:10,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:10,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:10,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:10,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:10,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:10,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127619375] [2020-10-11 12:45:10,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:10,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:10,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:10,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:10,409 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-11 12:45:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:10,473 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-11 12:45:10,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:45:10,473 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:10,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:10,475 INFO L225 Difference]: With dead ends: 182 [2020-10-11 12:45:10,475 INFO L226 Difference]: Without dead ends: 180 [2020-10-11 12:45:10,475 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-11 12:45:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-11 12:45:10,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-11 12:45:10,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-11 12:45:10,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-11 12:45:10,483 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-11 12:45:10,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:10,483 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-11 12:45:10,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:10,483 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-11 12:45:10,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:10,484 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:10,484 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:10,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-11 12:45:10,694 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:10,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:10,695 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-11 12:45:10,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:10,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630220126] [2020-10-11 12:45:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:10,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630220126] [2020-10-11 12:45:10,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834380838] [2020-10-11 12:45:10,836 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 [2020-10-11 12:45:10,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:10,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:10,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:10,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:11,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:11,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:11,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641348020] [2020-10-11 12:45:11,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:11,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:11,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:11,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:11,040 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-11 12:45:11,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:11,205 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-11 12:45:11,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:45:11,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:11,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:11,207 INFO L225 Difference]: With dead ends: 185 [2020-10-11 12:45:11,207 INFO L226 Difference]: Without dead ends: 183 [2020-10-11 12:45:11,209 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-11 12:45:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-11 12:45:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-11 12:45:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:11,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-11 12:45:11,213 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-11 12:45:11,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:11,214 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-11 12:45:11,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:11,214 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-11 12:45:11,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:11,215 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:11,215 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:11,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:11,416 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:11,416 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-11 12:45:11,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:11,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967152258] [2020-10-11 12:45:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:11,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967152258] [2020-10-11 12:45:11,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644893512] [2020-10-11 12:45:11,502 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 [2020-10-11 12:45:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:11,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:11,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:11,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:11,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:11,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913691655] [2020-10-11 12:45:11,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:11,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:11,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:11,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:11,704 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:11,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:11,934 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-11 12:45:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:45:11,935 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:11,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:11,937 INFO L225 Difference]: With dead ends: 191 [2020-10-11 12:45:11,937 INFO L226 Difference]: Without dead ends: 189 [2020-10-11 12:45:11,937 INFO L673 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 [2020-10-11 12:45:11,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-11 12:45:11,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-11 12:45:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:45:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-11 12:45:11,940 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-11 12:45:11,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:11,940 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-11 12:45:11,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-11 12:45:11,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:11,942 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:11,942 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:12,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:12,143 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:12,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:12,143 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-11 12:45:12,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:12,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315560924] [2020-10-11 12:45:12,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:12,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315560924] [2020-10-11 12:45:12,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661606400] [2020-10-11 12:45:12,221 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 [2020-10-11 12:45:12,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:12,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:12,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:12,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:12,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:12,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:12,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634909590] [2020-10-11 12:45:12,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:12,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:12,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:12,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:12,389 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-11 12:45:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:12,611 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-11 12:45:12,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:12,612 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:12,614 INFO L225 Difference]: With dead ends: 187 [2020-10-11 12:45:12,614 INFO L226 Difference]: Without dead ends: 185 [2020-10-11 12:45:12,615 INFO L673 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 [2020-10-11 12:45:12,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-11 12:45:12,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-11 12:45:12,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-11 12:45:12,618 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-11 12:45:12,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:12,618 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-11 12:45:12,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:12,619 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-11 12:45:12,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:12,619 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:12,619 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:12,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-11 12:45:12,822 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:12,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:12,822 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-11 12:45:12,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:12,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182681666] [2020-10-11 12:45:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:12,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182681666] [2020-10-11 12:45:12,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475239917] [2020-10-11 12:45:12,907 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 [2020-10-11 12:45:12,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:12,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:12,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:12,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:13,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:13,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:13,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164826429] [2020-10-11 12:45:13,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:13,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:13,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:13,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:13,054 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:13,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:13,291 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-11 12:45:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:13,292 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:13,293 INFO L225 Difference]: With dead ends: 198 [2020-10-11 12:45:13,293 INFO L226 Difference]: Without dead ends: 196 [2020-10-11 12:45:13,294 INFO L673 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 [2020-10-11 12:45:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-11 12:45:13,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-11 12:45:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-11 12:45:13,297 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-11 12:45:13,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:13,297 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-11 12:45:13,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-11 12:45:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:13,297 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:13,298 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:13,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:13,498 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:13,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:13,499 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-11 12:45:13,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:13,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013376783] [2020-10-11 12:45:13,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:13,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013376783] [2020-10-11 12:45:13,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584029108] [2020-10-11 12:45:13,580 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 [2020-10-11 12:45:13,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:13,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:13,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:13,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:13,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:13,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:13,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308909586] [2020-10-11 12:45:13,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:13,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:13,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:13,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:13,743 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-11 12:45:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:14,002 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-11 12:45:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:14,003 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:14,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:14,004 INFO L225 Difference]: With dead ends: 189 [2020-10-11 12:45:14,004 INFO L226 Difference]: Without dead ends: 187 [2020-10-11 12:45:14,005 INFO L673 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 [2020-10-11 12:45:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-11 12:45:14,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-11 12:45:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:45:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-11 12:45:14,008 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-11 12:45:14,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:14,008 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-11 12:45:14,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-11 12:45:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:14,008 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:14,009 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:14,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-11 12:45:14,209 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:14,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:14,210 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-11 12:45:14,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:14,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850627250] [2020-10-11 12:45:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:14,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850627250] [2020-10-11 12:45:14,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573830167] [2020-10-11 12:45:14,310 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 [2020-10-11 12:45:14,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:14,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:14,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:14,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:14,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:14,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:14,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874225305] [2020-10-11 12:45:14,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:14,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:14,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:14,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:14,476 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-11 12:45:14,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:14,566 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-11 12:45:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:45:14,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:14,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:14,568 INFO L225 Difference]: With dead ends: 178 [2020-10-11 12:45:14,568 INFO L226 Difference]: Without dead ends: 176 [2020-10-11 12:45:14,568 INFO L673 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 [2020-10-11 12:45:14,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-11 12:45:14,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-11 12:45:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-11 12:45:14,571 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-11 12:45:14,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:14,571 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-11 12:45:14,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:14,572 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-11 12:45:14,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:14,572 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:14,572 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:14,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:14,773 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:14,773 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-11 12:45:14,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:14,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503388094] [2020-10-11 12:45:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:14,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503388094] [2020-10-11 12:45:14,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615376771] [2020-10-11 12:45:14,864 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 [2020-10-11 12:45:14,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:14,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:14,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:14,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:15,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:15,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:15,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088001246] [2020-10-11 12:45:15,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:15,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:15,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:15,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:15,020 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-11 12:45:15,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:15,206 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-11 12:45:15,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:15,207 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:15,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:15,208 INFO L225 Difference]: With dead ends: 193 [2020-10-11 12:45:15,208 INFO L226 Difference]: Without dead ends: 191 [2020-10-11 12:45:15,208 INFO L673 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 [2020-10-11 12:45:15,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-11 12:45:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-11 12:45:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:45:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-11 12:45:15,211 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-11 12:45:15,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:15,212 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-11 12:45:15,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:15,212 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-11 12:45:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:15,212 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:15,212 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:15,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-11 12:45:15,413 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:15,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:15,414 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-11 12:45:15,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:15,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333040972] [2020-10-11 12:45:15,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:15,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333040972] [2020-10-11 12:45:15,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837303950] [2020-10-11 12:45:15,495 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 [2020-10-11 12:45:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:15,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:15,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:15,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:15,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:15,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290160915] [2020-10-11 12:45:15,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:15,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:15,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:15,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:15,691 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-11 12:45:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:15,942 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-11 12:45:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:15,943 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:15,945 INFO L225 Difference]: With dead ends: 195 [2020-10-11 12:45:15,945 INFO L226 Difference]: Without dead ends: 193 [2020-10-11 12:45:15,945 INFO L673 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 [2020-10-11 12:45:15,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-11 12:45:15,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-11 12:45:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:45:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-11 12:45:15,948 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-11 12:45:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:15,948 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-11 12:45:15,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-11 12:45:15,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:15,948 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:15,948 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:16,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:16,149 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:16,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:16,150 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-11 12:45:16,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:16,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821535162] [2020-10-11 12:45:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:16,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821535162] [2020-10-11 12:45:16,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463840969] [2020-10-11 12:45:16,243 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 [2020-10-11 12:45:16,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:16,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:16,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:16,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:16,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:16,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:16,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614247257] [2020-10-11 12:45:16,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:16,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:16,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:16,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:16,417 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-11 12:45:16,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:16,525 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-11 12:45:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:45:16,525 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:16,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:16,527 INFO L225 Difference]: With dead ends: 174 [2020-10-11 12:45:16,527 INFO L226 Difference]: Without dead ends: 172 [2020-10-11 12:45:16,527 INFO L673 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 [2020-10-11 12:45:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-11 12:45:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-11 12:45:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:16,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-11 12:45:16,530 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-11 12:45:16,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:16,531 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-11 12:45:16,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-11 12:45:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:16,532 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:16,532 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:16,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-11 12:45:16,733 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:16,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:16,734 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-11 12:45:16,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:16,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068123922] [2020-10-11 12:45:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:16,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068123922] [2020-10-11 12:45:16,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130613340] [2020-10-11 12:45:16,813 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 [2020-10-11 12:45:16,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:16,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:16,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:16,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:16,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:16,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:16,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122651300] [2020-10-11 12:45:16,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:16,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:16,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:16,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:16,965 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-11 12:45:17,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:17,196 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-11 12:45:17,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:17,197 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:17,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:17,198 INFO L225 Difference]: With dead ends: 189 [2020-10-11 12:45:17,199 INFO L226 Difference]: Without dead ends: 187 [2020-10-11 12:45:17,199 INFO L673 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 [2020-10-11 12:45:17,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-11 12:45:17,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-11 12:45:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:45:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-11 12:45:17,202 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-11 12:45:17,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:17,203 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-11 12:45:17,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:17,203 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-11 12:45:17,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:17,203 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:17,203 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:17,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:17,404 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:17,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:17,404 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-11 12:45:17,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:17,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468892162] [2020-10-11 12:45:17,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:17,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468892162] [2020-10-11 12:45:17,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492690336] [2020-10-11 12:45:17,479 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 [2020-10-11 12:45:17,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:17,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:17,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:17,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:17,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:17,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:17,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880703456] [2020-10-11 12:45:17,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:17,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:17,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:17,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:17,632 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-11 12:45:17,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:17,761 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-11 12:45:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:45:17,762 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:17,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:17,764 INFO L225 Difference]: With dead ends: 175 [2020-10-11 12:45:17,764 INFO L226 Difference]: Without dead ends: 173 [2020-10-11 12:45:17,764 INFO L673 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 [2020-10-11 12:45:17,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-11 12:45:17,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-11 12:45:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-11 12:45:17,766 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-11 12:45:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:17,767 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-11 12:45:17,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-11 12:45:17,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:17,767 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:17,768 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:17,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:17,970 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:17,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:17,970 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-11 12:45:17,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:17,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725478735] [2020-10-11 12:45:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:18,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725478735] [2020-10-11 12:45:18,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578128074] [2020-10-11 12:45:18,042 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 [2020-10-11 12:45:18,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:18,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:18,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:18,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:18,185 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:18,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:18,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:18,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225079174] [2020-10-11 12:45:18,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:18,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:18,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:18,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:18,217 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:18,540 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-11 12:45:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:18,540 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:18,542 INFO L225 Difference]: With dead ends: 195 [2020-10-11 12:45:18,543 INFO L226 Difference]: Without dead ends: 190 [2020-10-11 12:45:18,543 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:45:18,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-11 12:45:18,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-11 12:45:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:18,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-11 12:45:18,546 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-11 12:45:18,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:18,547 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-11 12:45:18,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:18,547 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-11 12:45:18,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:18,547 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:18,548 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:18,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:18,757 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:18,758 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-11 12:45:18,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:18,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863194338] [2020-10-11 12:45:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:18,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863194338] [2020-10-11 12:45:18,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280001644] [2020-10-11 12:45:18,831 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 [2020-10-11 12:45:18,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:18,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:18,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:18,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:18,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:18,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:18,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469239466] [2020-10-11 12:45:18,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:18,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:18,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:18,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:18,997 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-11 12:45:19,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:19,242 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-11 12:45:19,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:45:19,242 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:19,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:19,244 INFO L225 Difference]: With dead ends: 187 [2020-10-11 12:45:19,244 INFO L226 Difference]: Without dead ends: 185 [2020-10-11 12:45:19,245 INFO L673 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 [2020-10-11 12:45:19,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-11 12:45:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-11 12:45:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:19,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-11 12:45:19,248 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-11 12:45:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:19,248 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-11 12:45:19,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:19,248 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-11 12:45:19,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:19,248 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:19,248 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:19,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:19,449 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:19,450 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-11 12:45:19,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:19,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629285531] [2020-10-11 12:45:19,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:19,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629285531] [2020-10-11 12:45:19,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782739549] [2020-10-11 12:45:19,517 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 [2020-10-11 12:45:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:19,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:19,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:19,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:19,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:19,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:19,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293048237] [2020-10-11 12:45:19,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:19,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:19,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:19,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:19,690 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:20,119 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-11 12:45:20,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:45:20,120 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:20,121 INFO L225 Difference]: With dead ends: 212 [2020-10-11 12:45:20,121 INFO L226 Difference]: Without dead ends: 207 [2020-10-11 12:45:20,122 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:45:20,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-11 12:45:20,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-11 12:45:20,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-11 12:45:20,125 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-11 12:45:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:20,125 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-11 12:45:20,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-11 12:45:20,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:20,126 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:20,126 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:20,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-11 12:45:20,327 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:20,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:20,327 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-11 12:45:20,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:20,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505802402] [2020-10-11 12:45:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:20,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505802402] [2020-10-11 12:45:20,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148056387] [2020-10-11 12:45:20,396 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 [2020-10-11 12:45:20,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:20,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:20,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:20,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:20,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:20,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:20,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:20,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300315402] [2020-10-11 12:45:20,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:20,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:20,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:20,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:20,554 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:20,872 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-11 12:45:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:20,873 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:20,875 INFO L225 Difference]: With dead ends: 202 [2020-10-11 12:45:20,875 INFO L226 Difference]: Without dead ends: 197 [2020-10-11 12:45:20,875 INFO L673 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 [2020-10-11 12:45:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-11 12:45:20,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-11 12:45:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:45:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-11 12:45:20,879 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-11 12:45:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:20,879 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-11 12:45:20,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-11 12:45:20,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:20,880 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:20,880 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:21,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:21,085 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:21,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:21,086 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-11 12:45:21,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:21,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549378765] [2020-10-11 12:45:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:21,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549378765] [2020-10-11 12:45:21,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9390555] [2020-10-11 12:45:21,154 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 [2020-10-11 12:45:21,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:21,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:21,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:21,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:21,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:21,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:21,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709630338] [2020-10-11 12:45:21,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:21,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:21,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:21,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:21,857 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-11 12:45:22,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:22,121 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-11 12:45:22,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:22,122 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:22,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:22,123 INFO L225 Difference]: With dead ends: 198 [2020-10-11 12:45:22,123 INFO L226 Difference]: Without dead ends: 196 [2020-10-11 12:45:22,123 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:45:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-11 12:45:22,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-11 12:45:22,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-11 12:45:22,127 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-11 12:45:22,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:22,127 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-11 12:45:22,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:22,127 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-11 12:45:22,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:22,128 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:22,128 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:22,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-11 12:45:22,329 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:22,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:22,329 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-11 12:45:22,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:22,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192284613] [2020-10-11 12:45:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:22,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192284613] [2020-10-11 12:45:22,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078964187] [2020-10-11 12:45:22,395 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 [2020-10-11 12:45:22,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:22,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:22,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:22,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:22,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:22,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:22,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841203231] [2020-10-11 12:45:22,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:22,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:22,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:22,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:22,591 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-11 12:45:22,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:22,986 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-11 12:45:22,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:45:22,987 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:22,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:22,989 INFO L225 Difference]: With dead ends: 209 [2020-10-11 12:45:22,989 INFO L226 Difference]: Without dead ends: 207 [2020-10-11 12:45:22,989 INFO L673 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 [2020-10-11 12:45:22,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-11 12:45:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-11 12:45:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-11 12:45:22,993 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-11 12:45:22,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:22,993 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-11 12:45:22,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-11 12:45:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:22,993 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:22,993 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:23,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-11 12:45:23,194 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:23,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:23,195 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-11 12:45:23,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:23,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117465420] [2020-10-11 12:45:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:23,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117465420] [2020-10-11 12:45:23,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812384117] [2020-10-11 12:45:23,266 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 [2020-10-11 12:45:23,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:23,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:23,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:23,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:23,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:23,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:23,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:23,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643832721] [2020-10-11 12:45:23,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:23,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:23,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:23,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:23,469 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-11 12:45:23,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:23,981 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-11 12:45:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:45:23,982 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:23,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:23,983 INFO L225 Difference]: With dead ends: 217 [2020-10-11 12:45:23,984 INFO L226 Difference]: Without dead ends: 212 [2020-10-11 12:45:23,984 INFO L673 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 [2020-10-11 12:45:23,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-11 12:45:23,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-11 12:45:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-11 12:45:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-11 12:45:23,988 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-11 12:45:23,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:23,988 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-11 12:45:23,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:23,988 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-11 12:45:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:23,989 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:23,989 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:24,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-11 12:45:24,196 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:24,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:24,196 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-11 12:45:24,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:24,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798364287] [2020-10-11 12:45:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:24,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798364287] [2020-10-11 12:45:24,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744459256] [2020-10-11 12:45:24,266 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 [2020-10-11 12:45:24,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:24,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:24,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:24,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:26,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:26,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:26,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:26,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344848922] [2020-10-11 12:45:26,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:26,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:26,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:26,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-11 12:45:26,520 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-11 12:45:30,829 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-11 12:45:35,061 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-11 12:45:36,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:36,611 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-11 12:45:36,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:45:36,612 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:36,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:36,613 INFO L225 Difference]: With dead ends: 236 [2020-10-11 12:45:36,613 INFO L226 Difference]: Without dead ends: 228 [2020-10-11 12:45:36,613 INFO L673 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 [2020-10-11 12:45:36,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-11 12:45:36,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-11 12:45:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:45:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-11 12:45:36,617 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-11 12:45:36,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:36,617 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-11 12:45:36,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:36,618 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-11 12:45:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:36,618 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:36,618 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:36,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-11 12:45:36,827 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:36,827 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-11 12:45:36,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:36,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304796843] [2020-10-11 12:45:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:36,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304796843] [2020-10-11 12:45:36,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925321436] [2020-10-11 12:45:36,903 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 [2020-10-11 12:45:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:36,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:36,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:37,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:37,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:37,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:37,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:37,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534439134] [2020-10-11 12:45:37,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:37,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:37,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:37,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:37,114 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-10-11 12:45:37,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:37,662 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-10-11 12:45:37,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:45:37,663 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:37,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:37,664 INFO L225 Difference]: With dead ends: 219 [2020-10-11 12:45:37,664 INFO L226 Difference]: Without dead ends: 214 [2020-10-11 12:45:37,664 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:45:37,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-11 12:45:37,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-10-11 12:45:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:45:37,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-11 12:45:37,667 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-11 12:45:37,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:37,667 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-11 12:45:37,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:37,668 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-11 12:45:37,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:37,668 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:37,668 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:37,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:37,870 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:37,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:37,871 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-11 12:45:37,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:37,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761354014] [2020-10-11 12:45:37,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:37,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761354014] [2020-10-11 12:45:37,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759698300] [2020-10-11 12:45:37,946 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 [2020-10-11 12:45:37,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:37,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:37,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:37,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:38,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:38,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:38,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742347180] [2020-10-11 12:45:38,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:38,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:38,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:38,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:38,128 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-11 12:45:38,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:38,406 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-11 12:45:38,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:38,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:38,407 INFO L225 Difference]: With dead ends: 197 [2020-10-11 12:45:38,407 INFO L226 Difference]: Without dead ends: 195 [2020-10-11 12:45:38,407 INFO L673 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 [2020-10-11 12:45:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-11 12:45:38,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-11 12:45:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-11 12:45:38,410 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-11 12:45:38,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:38,410 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-11 12:45:38,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:38,410 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-11 12:45:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:38,411 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:38,411 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:38,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:38,614 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:38,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:38,614 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-11 12:45:38,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:38,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499700316] [2020-10-11 12:45:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:38,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499700316] [2020-10-11 12:45:38,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030233506] [2020-10-11 12:45:38,691 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 [2020-10-11 12:45:38,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:38,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:38,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:38,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:38,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:38,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:38,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513512024] [2020-10-11 12:45:38,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:38,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:38,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:38,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:38,861 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-11 12:45:39,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:39,137 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-11 12:45:39,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:39,138 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:39,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:39,138 INFO L225 Difference]: With dead ends: 202 [2020-10-11 12:45:39,139 INFO L226 Difference]: Without dead ends: 200 [2020-10-11 12:45:39,139 INFO L673 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 [2020-10-11 12:45:39,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-11 12:45:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-11 12:45:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-11 12:45:39,142 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-11 12:45:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:39,142 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-11 12:45:39,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-11 12:45:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:39,142 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:39,142 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:39,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-11 12:45:39,343 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:39,344 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-11 12:45:39,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:39,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131055336] [2020-10-11 12:45:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:39,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131055336] [2020-10-11 12:45:39,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478618347] [2020-10-11 12:45:39,422 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 [2020-10-11 12:45:39,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:39,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:39,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:39,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:39,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:39,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:39,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689911088] [2020-10-11 12:45:39,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:39,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:39,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:39,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:39,605 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-11 12:45:39,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:39,891 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-11 12:45:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:45:39,891 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:39,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:39,892 INFO L225 Difference]: With dead ends: 197 [2020-10-11 12:45:39,892 INFO L226 Difference]: Without dead ends: 195 [2020-10-11 12:45:39,892 INFO L673 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 [2020-10-11 12:45:39,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-11 12:45:39,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-11 12:45:39,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:39,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-11 12:45:39,895 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-11 12:45:39,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:39,895 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-11 12:45:39,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:39,895 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-11 12:45:39,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:39,896 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:39,896 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:40,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-11 12:45:40,097 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:40,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:40,097 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-11 12:45:40,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:40,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74724719] [2020-10-11 12:45:40,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:40,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74724719] [2020-10-11 12:45:40,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375916186] [2020-10-11 12:45:40,173 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 [2020-10-11 12:45:40,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:40,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:40,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:40,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:40,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:40,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:40,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475001478] [2020-10-11 12:45:40,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:40,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:40,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:40,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:40,401 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-11 12:45:40,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:40,978 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-11 12:45:40,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:45:40,979 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:40,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:40,980 INFO L225 Difference]: With dead ends: 214 [2020-10-11 12:45:40,980 INFO L226 Difference]: Without dead ends: 212 [2020-10-11 12:45:40,980 INFO L673 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 [2020-10-11 12:45:40,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-11 12:45:40,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-11 12:45:40,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-11 12:45:40,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-11 12:45:40,986 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-11 12:45:40,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:40,986 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-11 12:45:40,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:40,987 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-11 12:45:40,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:40,987 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:40,988 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:41,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-11 12:45:41,199 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:41,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:41,200 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-11 12:45:41,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:41,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851691545] [2020-10-11 12:45:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:41,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:41,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851691545] [2020-10-11 12:45:41,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333481823] [2020-10-11 12:45:41,330 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 [2020-10-11 12:45:41,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:41,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:41,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:41,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:41,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:41,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:41,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136708900] [2020-10-11 12:45:41,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:41,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:41,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:41,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:41,539 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-11 12:45:41,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:41,914 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-11 12:45:41,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:45:41,915 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:41,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:41,916 INFO L225 Difference]: With dead ends: 217 [2020-10-11 12:45:41,916 INFO L226 Difference]: Without dead ends: 215 [2020-10-11 12:45:41,916 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:45:41,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-11 12:45:41,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-11 12:45:41,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-11 12:45:41,920 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-11 12:45:41,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:41,920 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-11 12:45:41,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:41,920 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-11 12:45:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:41,921 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:41,921 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:42,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:42,130 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:42,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:42,131 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-11 12:45:42,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:42,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016929934] [2020-10-11 12:45:42,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:42,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016929934] [2020-10-11 12:45:42,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840908825] [2020-10-11 12:45:42,208 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 [2020-10-11 12:45:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:42,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:42,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:42,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:42,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:42,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189397817] [2020-10-11 12:45:42,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:42,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:42,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:42,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:42,373 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-11 12:45:42,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:42,779 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-11 12:45:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:45:42,780 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:42,780 INFO L225 Difference]: With dead ends: 211 [2020-10-11 12:45:42,781 INFO L226 Difference]: Without dead ends: 209 [2020-10-11 12:45:42,781 INFO L673 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 [2020-10-11 12:45:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-11 12:45:42,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-11 12:45:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-11 12:45:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-11 12:45:42,785 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-11 12:45:42,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:42,785 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-11 12:45:42,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-11 12:45:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:42,786 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:42,786 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:42,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:42,993 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:42,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:42,994 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-11 12:45:42,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:42,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361879753] [2020-10-11 12:45:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:43,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361879753] [2020-10-11 12:45:43,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081324966] [2020-10-11 12:45:43,073 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 [2020-10-11 12:45:43,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:43,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:43,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:43,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:43,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:43,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:43,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:43,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942311973] [2020-10-11 12:45:43,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:43,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:43,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:43,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:43,227 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-11 12:45:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:43,708 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-11 12:45:43,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:45:43,708 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:43,709 INFO L225 Difference]: With dead ends: 211 [2020-10-11 12:45:43,710 INFO L226 Difference]: Without dead ends: 206 [2020-10-11 12:45:43,710 INFO L673 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 [2020-10-11 12:45:43,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-11 12:45:43,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-11 12:45:43,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-11 12:45:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-11 12:45:43,714 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-11 12:45:43,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:43,714 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-11 12:45:43,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-11 12:45:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:43,715 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:43,715 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:43,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-11 12:45:43,915 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:43,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:43,916 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-11 12:45:43,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:43,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199823232] [2020-10-11 12:45:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:43,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199823232] [2020-10-11 12:45:43,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546215520] [2020-10-11 12:45:43,997 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 [2020-10-11 12:45:44,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:45:44,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:44,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:44,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:44,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:44,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:44,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:44,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439610126] [2020-10-11 12:45:44,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:44,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:44,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:44,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:44,180 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-11 12:45:44,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:44,777 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-11 12:45:44,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:45:44,778 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:44,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:44,778 INFO L225 Difference]: With dead ends: 227 [2020-10-11 12:45:44,778 INFO L226 Difference]: Without dead ends: 222 [2020-10-11 12:45:44,779 INFO L673 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 [2020-10-11 12:45:44,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-11 12:45:44,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-11 12:45:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-11 12:45:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-11 12:45:44,783 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-11 12:45:44,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:44,783 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-11 12:45:44,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:44,783 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-11 12:45:44,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:44,783 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:44,783 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:44,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-11 12:45:44,984 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:44,985 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-11 12:45:44,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:44,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749353956] [2020-10-11 12:45:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:45,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749353956] [2020-10-11 12:45:45,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234065174] [2020-10-11 12:45:45,061 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 [2020-10-11 12:45:45,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:45:45,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:45,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:45,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:45,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:45,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:45,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964698068] [2020-10-11 12:45:45,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:45,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:45,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:45,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:45,231 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-11 12:45:45,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:45,716 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-11 12:45:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:45:45,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:45,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:45,717 INFO L225 Difference]: With dead ends: 221 [2020-10-11 12:45:45,717 INFO L226 Difference]: Without dead ends: 219 [2020-10-11 12:45:45,717 INFO L673 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 [2020-10-11 12:45:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-11 12:45:45,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-11 12:45:45,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-11 12:45:45,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-11 12:45:45,720 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-11 12:45:45,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:45,720 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-11 12:45:45,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:45,721 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-11 12:45:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:45,721 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:45,721 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:45,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:45,922 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:45,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:45,922 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-11 12:45:45,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:45,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428737795] [2020-10-11 12:45:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:46,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428737795] [2020-10-11 12:45:46,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410349823] [2020-10-11 12:45:46,003 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 [2020-10-11 12:45:46,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:45:46,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:46,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:46,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:46,160 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:45:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:46,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:46,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:46,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166050350] [2020-10-11 12:45:46,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:46,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:46,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:46,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:46,172 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-11 12:45:46,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:46,779 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-11 12:45:46,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:45:46,780 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:46,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:46,781 INFO L225 Difference]: With dead ends: 240 [2020-10-11 12:45:46,781 INFO L226 Difference]: Without dead ends: 232 [2020-10-11 12:45:46,781 INFO L673 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 [2020-10-11 12:45:46,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-11 12:45:46,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-11 12:45:46,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-11 12:45:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-11 12:45:46,784 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-11 12:45:46,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:46,785 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-11 12:45:46,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:46,785 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-11 12:45:46,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:46,785 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:46,785 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:46,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-11 12:45:46,986 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:46,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:46,987 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-11 12:45:46,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:46,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885209775] [2020-10-11 12:45:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:47,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885209775] [2020-10-11 12:45:47,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465476447] [2020-10-11 12:45:47,061 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 [2020-10-11 12:45:47,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:45:47,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:47,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:47,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:47,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:47,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:47,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:47,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70934846] [2020-10-11 12:45:47,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:47,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:47,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:47,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:47,282 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-11 12:45:47,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:47,932 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-11 12:45:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:45:47,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:47,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:47,933 INFO L225 Difference]: With dead ends: 238 [2020-10-11 12:45:47,934 INFO L226 Difference]: Without dead ends: 230 [2020-10-11 12:45:47,934 INFO L673 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 [2020-10-11 12:45:47,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-11 12:45:47,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-11 12:45:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:47,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-11 12:45:47,941 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-11 12:45:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:47,941 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-11 12:45:47,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:47,942 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-11 12:45:47,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:47,942 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:47,942 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:48,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:48,153 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:48,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:48,153 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-11 12:45:48,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:48,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415564327] [2020-10-11 12:45:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:48,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415564327] [2020-10-11 12:45:48,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030069957] [2020-10-11 12:45:48,229 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 [2020-10-11 12:45:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:48,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:48,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:48,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:48,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:48,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182430833] [2020-10-11 12:45:48,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:48,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:48,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:48,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:48,400 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-11 12:45:48,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:48,655 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-11 12:45:48,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:45:48,656 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:48,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:48,656 INFO L225 Difference]: With dead ends: 195 [2020-10-11 12:45:48,657 INFO L226 Difference]: Without dead ends: 193 [2020-10-11 12:45:48,657 INFO L673 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 [2020-10-11 12:45:48,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-11 12:45:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-11 12:45:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:45:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-11 12:45:48,660 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-11 12:45:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:48,660 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-11 12:45:48,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-11 12:45:48,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:48,661 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:48,661 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:48,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-11 12:45:48,862 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:48,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:48,862 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-11 12:45:48,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:48,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192985386] [2020-10-11 12:45:48,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:48,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192985386] [2020-10-11 12:45:48,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797878023] [2020-10-11 12:45:48,943 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 [2020-10-11 12:45:48,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:45:48,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:48,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:48,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:49,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:49,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:45:49,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590318446] [2020-10-11 12:45:49,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:45:49,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:49,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:45:49,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:45:49,127 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-11 12:45:49,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:45:49,617 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-11 12:45:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:45:49,617 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:45:49,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:45:49,618 INFO L225 Difference]: With dead ends: 206 [2020-10-11 12:45:49,618 INFO L226 Difference]: Without dead ends: 204 [2020-10-11 12:45:49,619 INFO L673 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 [2020-10-11 12:45:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-11 12:45:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-11 12:45:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-11 12:45:49,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-11 12:45:49,622 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-11 12:45:49,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:45:49,622 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-11 12:45:49,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:45:49,622 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-11 12:45:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:45:49,623 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:45:49,623 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:45:49,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:45:49,824 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:45:49,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:45:49,825 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-11 12:45:49,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:45:49,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374687391] [2020-10-11 12:45:49,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:45:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:45:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:49,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374687391] [2020-10-11 12:45:49,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665785748] [2020-10-11 12:45:49,906 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 [2020-10-11 12:45:49,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:45:49,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:45:49,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:45:49,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:45:50,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:45:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:45:52,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:45:52,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-11 12:45:52,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789544759] [2020-10-11 12:45:52,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 12:45:52,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:45:52,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 12:45:52,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-11 12:45:52,181 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-11 12:45:53,848 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-11 12:46:16,657 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-11 12:46:44,101 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-11 12:47:06,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:06,564 INFO L93 Difference]: Finished difference Result 252 states and 593 transitions. [2020-10-11 12:47:06,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:47:06,564 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-11 12:47:06,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:06,565 INFO L225 Difference]: With dead ends: 252 [2020-10-11 12:47:06,565 INFO L226 Difference]: Without dead ends: 247 [2020-10-11 12:47:06,566 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-11 12:47:06,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-11 12:47:06,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2020-10-11 12:47:06,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:47:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-11 12:47:06,570 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-11 12:47:06,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:06,570 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-11 12:47:06,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 12:47:06,571 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-11 12:47:06,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:06,571 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:06,571 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:06,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-11 12:47:06,781 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:06,781 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-11 12:47:06,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:06,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091255576] [2020-10-11 12:47:06,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:06,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091255576] [2020-10-11 12:47:06,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903065242] [2020-10-11 12:47:06,868 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 [2020-10-11 12:47:06,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:06,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:06,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:06,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:07,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:07,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:07,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999965114] [2020-10-11 12:47:07,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:07,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:07,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:07,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:07,038 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-11 12:47:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:07,264 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-11 12:47:07,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:47:07,264 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:07,265 INFO L225 Difference]: With dead ends: 194 [2020-10-11 12:47:07,265 INFO L226 Difference]: Without dead ends: 192 [2020-10-11 12:47:07,265 INFO L673 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 [2020-10-11 12:47:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-11 12:47:07,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-11 12:47:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:47:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-11 12:47:07,268 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-11 12:47:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:07,268 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-11 12:47:07,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-11 12:47:07,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:07,269 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:07,269 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:07,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:07,470 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:07,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:07,470 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-11 12:47:07,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:07,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729871193] [2020-10-11 12:47:07,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:07,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729871193] [2020-10-11 12:47:07,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634324712] [2020-10-11 12:47:07,561 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 [2020-10-11 12:47:07,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:47:07,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:07,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:07,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:07,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:07,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:07,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751468831] [2020-10-11 12:47:07,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:07,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:07,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:07,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:07,741 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-11 12:47:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:08,053 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-11 12:47:08,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:08,053 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:08,054 INFO L225 Difference]: With dead ends: 205 [2020-10-11 12:47:08,054 INFO L226 Difference]: Without dead ends: 203 [2020-10-11 12:47:08,054 INFO L673 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 [2020-10-11 12:47:08,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-11 12:47:08,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-11 12:47:08,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:47:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-11 12:47:08,058 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-11 12:47:08,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:08,058 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-11 12:47:08,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:08,059 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-11 12:47:08,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:08,059 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:08,059 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:08,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:08,260 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:08,260 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-11 12:47:08,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:08,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220063849] [2020-10-11 12:47:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:08,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220063849] [2020-10-11 12:47:08,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220297807] [2020-10-11 12:47:08,344 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 [2020-10-11 12:47:08,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:47:08,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:08,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:08,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:08,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:08,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:08,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974441518] [2020-10-11 12:47:08,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:08,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:08,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:08,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:08,515 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-11 12:47:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:08,787 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-11 12:47:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:08,788 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:08,789 INFO L225 Difference]: With dead ends: 201 [2020-10-11 12:47:08,789 INFO L226 Difference]: Without dead ends: 199 [2020-10-11 12:47:08,789 INFO L673 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 [2020-10-11 12:47:08,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-11 12:47:08,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-11 12:47:08,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-11 12:47:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-11 12:47:08,793 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-11 12:47:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:08,793 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-11 12:47:08,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-11 12:47:08,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:08,793 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:08,794 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:08,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:08,994 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:08,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-11 12:47:08,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:08,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626729454] [2020-10-11 12:47:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:09,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626729454] [2020-10-11 12:47:09,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373407713] [2020-10-11 12:47:09,075 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 [2020-10-11 12:47:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:09,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:09,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:09,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:09,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:09,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744533380] [2020-10-11 12:47:09,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:09,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:09,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:09,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:09,253 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-11 12:47:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:09,504 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-11 12:47:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:47:09,505 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:09,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:09,506 INFO L225 Difference]: With dead ends: 194 [2020-10-11 12:47:09,506 INFO L226 Difference]: Without dead ends: 192 [2020-10-11 12:47:09,506 INFO L673 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 [2020-10-11 12:47:09,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-11 12:47:09,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-11 12:47:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:47:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-11 12:47:09,510 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-11 12:47:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:09,510 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-11 12:47:09,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-11 12:47:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:09,511 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:09,511 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:09,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-11 12:47:09,712 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:09,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:09,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-11 12:47:09,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:09,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348708642] [2020-10-11 12:47:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:09,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348708642] [2020-10-11 12:47:09,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334229043] [2020-10-11 12:47:09,794 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 [2020-10-11 12:47:09,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:09,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:09,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:09,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:09,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:09,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:09,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613066454] [2020-10-11 12:47:09,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:09,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:09,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:09,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:09,978 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-11 12:47:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:10,330 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-11 12:47:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:47:10,331 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:10,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:10,332 INFO L225 Difference]: With dead ends: 209 [2020-10-11 12:47:10,332 INFO L226 Difference]: Without dead ends: 207 [2020-10-11 12:47:10,332 INFO L673 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 [2020-10-11 12:47:10,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-11 12:47:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-11 12:47:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-11 12:47:10,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-11 12:47:10,339 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-11 12:47:10,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:10,339 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-11 12:47:10,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:10,339 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-11 12:47:10,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:10,339 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:10,339 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:10,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:10,549 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:10,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:10,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-11 12:47:10,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:10,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128677488] [2020-10-11 12:47:10,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:10,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128677488] [2020-10-11 12:47:10,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323501030] [2020-10-11 12:47:10,632 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 [2020-10-11 12:47:10,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:47:10,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:10,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:10,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:10,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:10,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:10,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384941023] [2020-10-11 12:47:10,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:10,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:10,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:10,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:10,829 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-11 12:47:11,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:11,149 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-11 12:47:11,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:47:11,150 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:11,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:11,150 INFO L225 Difference]: With dead ends: 202 [2020-10-11 12:47:11,150 INFO L226 Difference]: Without dead ends: 200 [2020-10-11 12:47:11,151 INFO L673 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 [2020-10-11 12:47:11,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-11 12:47:11,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-11 12:47:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:47:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-11 12:47:11,153 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-11 12:47:11,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:11,153 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-11 12:47:11,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:11,153 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-11 12:47:11,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:11,154 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:11,154 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:11,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-11 12:47:11,354 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:11,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-11 12:47:11,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:11,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320875819] [2020-10-11 12:47:11,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:11,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320875819] [2020-10-11 12:47:11,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339716440] [2020-10-11 12:47:11,435 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 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 [2020-10-11 12:47:11,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:11,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:11,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:11,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:11,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:11,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:11,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559071820] [2020-10-11 12:47:11,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:11,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:11,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:11,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:11,615 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-11 12:47:11,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:11,939 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-11 12:47:11,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:47:11,940 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:11,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:11,941 INFO L225 Difference]: With dead ends: 201 [2020-10-11 12:47:11,941 INFO L226 Difference]: Without dead ends: 199 [2020-10-11 12:47:11,942 INFO L673 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 [2020-10-11 12:47:11,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-11 12:47:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-11 12:47:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-11 12:47:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-11 12:47:11,945 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-11 12:47:11,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:11,945 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-11 12:47:11,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:11,945 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-11 12:47:11,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:11,946 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:11,946 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:12,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-11 12:47:12,147 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:12,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:12,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-11 12:47:12,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:12,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856574475] [2020-10-11 12:47:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:12,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856574475] [2020-10-11 12:47:12,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147011585] [2020-10-11 12:47:12,227 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 [2020-10-11 12:47:12,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:47:12,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:12,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:12,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:12,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:12,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:12,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63410043] [2020-10-11 12:47:12,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:12,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:12,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:12,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:12,410 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-11 12:47:12,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:12,865 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-11 12:47:12,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:47:12,865 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:12,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:12,866 INFO L225 Difference]: With dead ends: 215 [2020-10-11 12:47:12,866 INFO L226 Difference]: Without dead ends: 213 [2020-10-11 12:47:12,866 INFO L673 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 [2020-10-11 12:47:12,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-11 12:47:12,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-11 12:47:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:47:12,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-11 12:47:12,871 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-11 12:47:12,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:12,871 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-11 12:47:12,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:12,871 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-11 12:47:12,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:12,872 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:12,872 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:13,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:13,075 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:13,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:13,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-11 12:47:13,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:13,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395202239] [2020-10-11 12:47:13,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:13,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395202239] [2020-10-11 12:47:13,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066343996] [2020-10-11 12:47:13,156 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 [2020-10-11 12:47:13,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:47:13,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:13,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:13,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:13,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:13,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:13,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711793681] [2020-10-11 12:47:13,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:13,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:13,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:13,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:13,330 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-11 12:47:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:13,723 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-11 12:47:13,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:47:13,724 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:13,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:13,725 INFO L225 Difference]: With dead ends: 196 [2020-10-11 12:47:13,725 INFO L226 Difference]: Without dead ends: 194 [2020-10-11 12:47:13,726 INFO L673 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 [2020-10-11 12:47:13,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-11 12:47:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-11 12:47:13,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-11 12:47:13,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-11 12:47:13,730 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-11 12:47:13,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:13,730 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-11 12:47:13,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-11 12:47:13,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:13,730 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:13,731 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:13,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:13,933 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:13,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:13,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-11 12:47:13,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:13,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227702207] [2020-10-11 12:47:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:14,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227702207] [2020-10-11 12:47:14,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635658309] [2020-10-11 12:47:14,017 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 [2020-10-11 12:47:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:14,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:14,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:14,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:47:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:14,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:14,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:14,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982693017] [2020-10-11 12:47:14,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:14,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:14,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:14,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:14,165 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-11 12:47:14,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:14,476 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-11 12:47:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:47:14,477 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:14,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:14,477 INFO L225 Difference]: With dead ends: 191 [2020-10-11 12:47:14,477 INFO L226 Difference]: Without dead ends: 186 [2020-10-11 12:47:14,478 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:47:14,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-11 12:47:14,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-11 12:47:14,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-11 12:47:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-11 12:47:14,481 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-11 12:47:14,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:14,481 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-11 12:47:14,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-11 12:47:14,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:14,482 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:14,482 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:14,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-11 12:47:14,683 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:14,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:14,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-11 12:47:14,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:14,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858491281] [2020-10-11 12:47:14,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:14,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858491281] [2020-10-11 12:47:14,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842830936] [2020-10-11 12:47:14,766 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 [2020-10-11 12:47:14,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:14,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:14,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:14,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:14,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:47:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:14,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:14,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:14,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166324890] [2020-10-11 12:47:14,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:14,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:14,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:14,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:14,958 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-11 12:47:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:15,538 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-11 12:47:15,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:47:15,538 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:15,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:15,539 INFO L225 Difference]: With dead ends: 232 [2020-10-11 12:47:15,539 INFO L226 Difference]: Without dead ends: 227 [2020-10-11 12:47:15,539 INFO L673 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 [2020-10-11 12:47:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-11 12:47:15,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-11 12:47:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-11 12:47:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-11 12:47:15,543 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-11 12:47:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:15,544 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-11 12:47:15,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:15,544 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-11 12:47:15,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:15,544 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:15,544 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:15,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:15,754 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:15,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:15,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-11 12:47:15,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:15,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810387389] [2020-10-11 12:47:15,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:15,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810387389] [2020-10-11 12:47:15,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035299858] [2020-10-11 12:47:15,843 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 [2020-10-11 12:47:15,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:47:15,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:15,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:15,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:16,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:16,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:16,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617699653] [2020-10-11 12:47:16,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:16,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:16,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:16,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:16,024 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-11 12:47:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:16,571 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-11 12:47:16,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:47:16,572 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:16,573 INFO L225 Difference]: With dead ends: 222 [2020-10-11 12:47:16,573 INFO L226 Difference]: Without dead ends: 220 [2020-10-11 12:47:16,574 INFO L673 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 [2020-10-11 12:47:16,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-11 12:47:16,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-11 12:47:16,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-11 12:47:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-11 12:47:16,577 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-11 12:47:16,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:16,577 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-11 12:47:16,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:16,577 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-11 12:47:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:16,577 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:16,577 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:16,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:16,778 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:16,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-11 12:47:16,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:16,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386609203] [2020-10-11 12:47:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:16,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386609203] [2020-10-11 12:47:16,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305368142] [2020-10-11 12:47:16,857 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 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 [2020-10-11 12:47:16,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:16,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:16,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:16,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:17,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:47:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:17,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:17,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:17,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178597596] [2020-10-11 12:47:17,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:17,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:17,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:17,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:17,064 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-11 12:47:17,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:17,843 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-11 12:47:17,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:47:17,844 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:17,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:17,845 INFO L225 Difference]: With dead ends: 254 [2020-10-11 12:47:17,845 INFO L226 Difference]: Without dead ends: 246 [2020-10-11 12:47:17,845 INFO L673 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 [2020-10-11 12:47:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-11 12:47:17,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-11 12:47:17,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-11 12:47:17,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-11 12:47:17,849 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-11 12:47:17,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:17,850 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-11 12:47:17,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-11 12:47:17,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:17,850 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:17,851 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:18,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:18,060 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:18,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:18,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-11 12:47:18,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:18,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824086375] [2020-10-11 12:47:18,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:18,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824086375] [2020-10-11 12:47:18,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481696710] [2020-10-11 12:47:18,143 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 [2020-10-11 12:47:18,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:47:18,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:18,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:18,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:18,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:47:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:18,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:18,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:18,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118822216] [2020-10-11 12:47:18,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:18,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:18,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:18,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:18,333 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-11 12:47:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:19,115 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-11 12:47:19,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:47:19,116 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:19,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:19,117 INFO L225 Difference]: With dead ends: 246 [2020-10-11 12:47:19,117 INFO L226 Difference]: Without dead ends: 238 [2020-10-11 12:47:19,118 INFO L673 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 [2020-10-11 12:47:19,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-11 12:47:19,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-11 12:47:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:47:19,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-11 12:47:19,121 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-11 12:47:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:19,121 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-11 12:47:19,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-11 12:47:19,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:19,122 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:19,122 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:19,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-11 12:47:19,331 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:19,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:19,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-11 12:47:19,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:19,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657048192] [2020-10-11 12:47:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:19,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657048192] [2020-10-11 12:47:19,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592341375] [2020-10-11 12:47:19,409 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 [2020-10-11 12:47:19,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:47:19,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:19,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:19,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:19,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:19,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:19,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391960478] [2020-10-11 12:47:19,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:19,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:19,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:19,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:19,591 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-11 12:47:19,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:19,999 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-11 12:47:20,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:47:20,000 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:20,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:20,001 INFO L225 Difference]: With dead ends: 208 [2020-10-11 12:47:20,001 INFO L226 Difference]: Without dead ends: 206 [2020-10-11 12:47:20,001 INFO L673 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 [2020-10-11 12:47:20,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-11 12:47:20,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-11 12:47:20,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-11 12:47:20,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-11 12:47:20,004 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-11 12:47:20,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:20,004 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-11 12:47:20,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:20,004 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-11 12:47:20,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:20,005 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:20,005 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:20,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-11 12:47:20,206 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:20,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:20,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-11 12:47:20,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:20,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516473089] [2020-10-11 12:47:20,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:20,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516473089] [2020-10-11 12:47:20,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342140696] [2020-10-11 12:47:20,283 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 [2020-10-11 12:47:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:20,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:20,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:20,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:20,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:20,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993986008] [2020-10-11 12:47:20,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:20,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:20,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:20,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:20,445 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-11 12:47:20,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:20,980 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-11 12:47:20,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:47:20,981 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:20,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:20,982 INFO L225 Difference]: With dead ends: 215 [2020-10-11 12:47:20,982 INFO L226 Difference]: Without dead ends: 213 [2020-10-11 12:47:20,982 INFO L673 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 [2020-10-11 12:47:20,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-11 12:47:20,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-11 12:47:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-11 12:47:20,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-11 12:47:20,985 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-11 12:47:20,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:20,986 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-11 12:47:20,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:20,986 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-11 12:47:20,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:20,986 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:20,986 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:21,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-11 12:47:21,189 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:21,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:21,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-11 12:47:21,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:21,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293032811] [2020-10-11 12:47:21,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:21,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293032811] [2020-10-11 12:47:21,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724780872] [2020-10-11 12:47:21,275 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 [2020-10-11 12:47:21,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:21,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:21,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:21,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:21,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:47:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:21,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:21,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:21,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448544325] [2020-10-11 12:47:21,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:21,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:21,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:21,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:21,449 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-11 12:47:22,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:22,037 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-11 12:47:22,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:47:22,037 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:22,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:22,038 INFO L225 Difference]: With dead ends: 236 [2020-10-11 12:47:22,038 INFO L226 Difference]: Without dead ends: 228 [2020-10-11 12:47:22,038 INFO L673 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 [2020-10-11 12:47:22,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-11 12:47:22,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-11 12:47:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-11 12:47:22,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-11 12:47:22,040 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-11 12:47:22,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:22,041 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-11 12:47:22,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:22,041 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-11 12:47:22,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:22,041 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:22,041 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:22,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-11 12:47:22,242 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:22,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:22,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-11 12:47:22,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:22,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20679363] [2020-10-11 12:47:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:22,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20679363] [2020-10-11 12:47:22,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800807864] [2020-10-11 12:47:22,331 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 [2020-10-11 12:47:22,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:47:22,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:22,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:22,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:22,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:47:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:22,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:22,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:22,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201890303] [2020-10-11 12:47:22,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:22,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:22,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:22,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:22,493 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-11 12:47:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:23,129 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-11 12:47:23,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:47:23,131 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:23,132 INFO L225 Difference]: With dead ends: 241 [2020-10-11 12:47:23,132 INFO L226 Difference]: Without dead ends: 233 [2020-10-11 12:47:23,133 INFO L673 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 [2020-10-11 12:47:23,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-11 12:47:23,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-11 12:47:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-11 12:47:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-11 12:47:23,137 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-11 12:47:23,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:23,137 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-11 12:47:23,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-11 12:47:23,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:23,137 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:23,137 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:23,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-11 12:47:23,338 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:23,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:23,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-11 12:47:23,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:23,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022526763] [2020-10-11 12:47:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:23,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022526763] [2020-10-11 12:47:23,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924077463] [2020-10-11 12:47:23,429 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 [2020-10-11 12:47:23,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:23,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:23,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 12:47:23,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:23,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:47:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:23,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:23,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-11 12:47:23,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661750550] [2020-10-11 12:47:23,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 12:47:23,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:23,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 12:47:23,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-11 12:47:23,606 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-11 12:47:24,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:24,223 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-11 12:47:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:47:24,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-11 12:47:24,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:24,225 INFO L225 Difference]: With dead ends: 232 [2020-10-11 12:47:24,225 INFO L226 Difference]: Without dead ends: 224 [2020-10-11 12:47:24,225 INFO L673 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 [2020-10-11 12:47:24,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-11 12:47:24,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-11 12:47:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-11 12:47:24,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-11 12:47:24,228 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-11 12:47:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:24,229 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-11 12:47:24,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 12:47:24,229 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-11 12:47:24,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:24,229 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:24,229 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:24,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:24,430 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:24,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:24,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-11 12:47:24,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:24,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298800739] [2020-10-11 12:47:24,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:24,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298800739] [2020-10-11 12:47:24,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077272828] [2020-10-11 12:47:24,537 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 [2020-10-11 12:47:24,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 12:47:24,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:24,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:24,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:24,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:47:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:24,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:24,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-11 12:47:24,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223505083] [2020-10-11 12:47:24,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 12:47:24,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:24,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 12:47:24,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:47:24,771 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-11 12:47:25,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:25,060 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-11 12:47:25,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:47:25,061 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-11 12:47:25,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:25,062 INFO L225 Difference]: With dead ends: 185 [2020-10-11 12:47:25,062 INFO L226 Difference]: Without dead ends: 180 [2020-10-11 12:47:25,063 INFO L673 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 [2020-10-11 12:47:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-11 12:47:25,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-11 12:47:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-11 12:47:25,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-11 12:47:25,067 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-11 12:47:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:25,068 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-11 12:47:25,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 12:47:25,068 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-11 12:47:25,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:25,069 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:25,069 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:25,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-11 12:47:25,270 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:25,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:25,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-11 12:47:25,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:25,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030927428] [2020-10-11 12:47:25,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:25,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030927428] [2020-10-11 12:47:25,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565182705] [2020-10-11 12:47:25,473 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 [2020-10-11 12:47:25,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:47:25,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:25,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:25,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:25,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:25,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:25,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905002492] [2020-10-11 12:47:25,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:25,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:25,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:25,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:25,795 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-11 12:47:25,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:25,856 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-10-11 12:47:25,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:47:25,857 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-11 12:47:25,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:25,858 INFO L225 Difference]: With dead ends: 180 [2020-10-11 12:47:25,858 INFO L226 Difference]: Without dead ends: 177 [2020-10-11 12:47:25,858 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:25,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-11 12:47:25,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-10-11 12:47:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-11 12:47:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-11 12:47:25,861 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-11 12:47:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:25,862 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-11 12:47:25,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-11 12:47:25,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:25,862 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:25,862 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:26,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-11 12:47:26,071 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:26,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:26,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-11 12:47:26,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:26,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559538607] [2020-10-11 12:47:26,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:26,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559538607] [2020-10-11 12:47:26,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255753409] [2020-10-11 12:47:26,227 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 [2020-10-11 12:47:26,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:26,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:26,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:26,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:26,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:26,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:26,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979985313] [2020-10-11 12:47:26,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:26,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:26,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:26,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:26,442 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-11 12:47:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:26,531 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-10-11 12:47:26,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:47:26,532 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-11 12:47:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:26,532 INFO L225 Difference]: With dead ends: 197 [2020-10-11 12:47:26,533 INFO L226 Difference]: Without dead ends: 194 [2020-10-11 12:47:26,533 INFO L673 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 [2020-10-11 12:47:26,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-11 12:47:26,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-10-11 12:47:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-11 12:47:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-11 12:47:26,536 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-11 12:47:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:26,536 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-11 12:47:26,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-11 12:47:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:26,537 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:26,537 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:26,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:26,747 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:26,747 INFO L82 PathProgramCache]: Analyzing trace with hash 551260342, now seen corresponding path program 23 times [2020-10-11 12:47:26,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:26,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268392984] [2020-10-11 12:47:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:26,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268392984] [2020-10-11 12:47:26,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897172236] [2020-10-11 12:47:26,882 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 [2020-10-11 12:47:26,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 12:47:26,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:26,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:26,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:27,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:27,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:27,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144936791] [2020-10-11 12:47:27,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:27,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:27,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:27,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:27,092 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-11 12:47:27,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:27,195 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-10-11 12:47:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:47:27,196 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-11 12:47:27,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:27,197 INFO L225 Difference]: With dead ends: 196 [2020-10-11 12:47:27,197 INFO L226 Difference]: Without dead ends: 193 [2020-10-11 12:47:27,197 INFO L673 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 [2020-10-11 12:47:27,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-11 12:47:27,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-10-11 12:47:27,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-11 12:47:27,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-11 12:47:27,200 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-11 12:47:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:27,200 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-11 12:47:27,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-11 12:47:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:27,201 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:27,201 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:27,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:27,402 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:27,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:27,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1216195462, now seen corresponding path program 24 times [2020-10-11 12:47:27,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:27,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797349864] [2020-10-11 12:47:27,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:27,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797349864] [2020-10-11 12:47:27,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816654398] [2020-10-11 12:47:27,532 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 [2020-10-11 12:47:27,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 12:47:27,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:27,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:27,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:27,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:27,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:27,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961563081] [2020-10-11 12:47:27,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:27,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:27,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:27,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:27,747 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-11 12:47:27,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:27,888 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-11 12:47:27,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:47:27,889 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-11 12:47:27,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:27,890 INFO L225 Difference]: With dead ends: 195 [2020-10-11 12:47:27,890 INFO L226 Difference]: Without dead ends: 192 [2020-10-11 12:47:27,890 INFO L673 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 [2020-10-11 12:47:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-11 12:47:27,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-10-11 12:47:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-11 12:47:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-11 12:47:27,893 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-11 12:47:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:27,893 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-11 12:47:27,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-11 12:47:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:27,893 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:27,893 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:28,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:28,094 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:28,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:28,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1237644982, now seen corresponding path program 25 times [2020-10-11 12:47:28,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:28,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898808] [2020-10-11 12:47:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:28,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898808] [2020-10-11 12:47:28,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88680401] [2020-10-11 12:47:28,207 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 [2020-10-11 12:47:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:28,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:28,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:28,411 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:28,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:28,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:28,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681026216] [2020-10-11 12:47:28,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:28,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:28,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:28,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:28,412 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-11 12:47:28,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:28,598 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-10-11 12:47:28,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:47:28,598 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-11 12:47:28,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:28,599 INFO L225 Difference]: With dead ends: 194 [2020-10-11 12:47:28,599 INFO L226 Difference]: Without dead ends: 191 [2020-10-11 12:47:28,599 INFO L673 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 [2020-10-11 12:47:28,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-11 12:47:28,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-10-11 12:47:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-11 12:47:28,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-11 12:47:28,604 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-11 12:47:28,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:28,604 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-11 12:47:28,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:28,604 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-11 12:47:28,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:28,605 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:28,605 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:28,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:28,813 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:28,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:28,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1238336902, now seen corresponding path program 26 times [2020-10-11 12:47:28,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:28,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209915739] [2020-10-11 12:47:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:28,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209915739] [2020-10-11 12:47:28,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721235904] [2020-10-11 12:47:28,923 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 [2020-10-11 12:47:28,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:28,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:28,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:28,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:29,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:29,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:29,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213474831] [2020-10-11 12:47:29,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:29,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:29,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:29,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:29,165 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-11 12:47:29,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:29,377 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-10-11 12:47:29,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:47:29,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-11 12:47:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:29,378 INFO L225 Difference]: With dead ends: 193 [2020-10-11 12:47:29,378 INFO L226 Difference]: Without dead ends: 190 [2020-10-11 12:47:29,378 INFO L673 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 [2020-10-11 12:47:29,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-11 12:47:29,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-10-11 12:47:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-11 12:47:29,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-11 12:47:29,381 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-11 12:47:29,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:29,381 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-11 12:47:29,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:29,381 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-11 12:47:29,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 12:47:29,381 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:29,382 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:29,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-11 12:47:29,582 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:29,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:29,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1238359222, now seen corresponding path program 27 times [2020-10-11 12:47:29,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:29,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927035762] [2020-10-11 12:47:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:29,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927035762] [2020-10-11 12:47:29,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730575831] [2020-10-11 12:47:29,682 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 [2020-10-11 12:47:29,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:47:29,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:29,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:29,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:29,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:47:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:29,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:29,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:29,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934158035] [2020-10-11 12:47:29,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:29,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:29,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:29,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:29,905 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-11 12:47:30,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:30,166 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-11 12:47:30,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:47:30,167 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-11 12:47:30,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:30,168 INFO L225 Difference]: With dead ends: 202 [2020-10-11 12:47:30,168 INFO L226 Difference]: Without dead ends: 196 [2020-10-11 12:47:30,169 INFO L673 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 [2020-10-11 12:47:30,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-11 12:47:30,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-11 12:47:30,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-11 12:47:30,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-11 12:47:30,173 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-11 12:47:30,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:30,173 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-11 12:47:30,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-11 12:47:30,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:30,174 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:30,174 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:30,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-11 12:47:30,383 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:30,384 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-11 12:47:30,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:30,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120893876] [2020-10-11 12:47:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:30,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120893876] [2020-10-11 12:47:30,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745083947] [2020-10-11 12:47:30,502 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 [2020-10-11 12:47:30,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:47:30,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:30,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:30,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:30,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:30,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:30,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540880150] [2020-10-11 12:47:30,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:30,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:30,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:30,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:30,735 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-11 12:47:30,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:30,795 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-11 12:47:30,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 12:47:30,796 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:30,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:30,797 INFO L225 Difference]: With dead ends: 188 [2020-10-11 12:47:30,797 INFO L226 Difference]: Without dead ends: 186 [2020-10-11 12:47:30,797 INFO L673 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 [2020-10-11 12:47:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-11 12:47:30,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-11 12:47:30,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-11 12:47:30,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-11 12:47:30,800 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-11 12:47:30,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:30,800 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-11 12:47:30,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:30,801 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-11 12:47:30,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:30,801 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:30,801 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:31,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-11 12:47:31,002 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:31,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:31,003 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-11 12:47:31,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:31,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499360717] [2020-10-11 12:47:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:31,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499360717] [2020-10-11 12:47:31,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894182015] [2020-10-11 12:47:31,121 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 [2020-10-11 12:47:31,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:47:31,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:31,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:31,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:31,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:31,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:31,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397165077] [2020-10-11 12:47:31,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:31,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:31,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:31,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:31,362 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-11 12:47:31,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:31,602 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-11 12:47:31,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:47:31,603 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:31,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:31,604 INFO L225 Difference]: With dead ends: 199 [2020-10-11 12:47:31,604 INFO L226 Difference]: Without dead ends: 197 [2020-10-11 12:47:31,604 INFO L673 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 [2020-10-11 12:47:31,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-11 12:47:31,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-11 12:47:31,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-11 12:47:31,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-11 12:47:31,607 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-11 12:47:31,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:31,607 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-11 12:47:31,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:31,608 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-11 12:47:31,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:31,608 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:31,608 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:31,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-11 12:47:31,809 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:31,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:31,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-11 12:47:31,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:31,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73211812] [2020-10-11 12:47:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:31,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73211812] [2020-10-11 12:47:31,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371824699] [2020-10-11 12:47:31,932 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 [2020-10-11 12:47:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:31,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:31,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:32,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:32,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:32,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233979674] [2020-10-11 12:47:32,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:32,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:32,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:32,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:32,247 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-11 12:47:32,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:32,567 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-11 12:47:32,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:47:32,568 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:32,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:32,569 INFO L225 Difference]: With dead ends: 210 [2020-10-11 12:47:32,569 INFO L226 Difference]: Without dead ends: 208 [2020-10-11 12:47:32,569 INFO L673 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 [2020-10-11 12:47:32,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-11 12:47:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-11 12:47:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-11 12:47:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-11 12:47:32,573 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-11 12:47:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:32,573 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-11 12:47:32,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-11 12:47:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:32,573 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:32,573 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:32,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-11 12:47:32,774 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:32,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:32,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-11 12:47:32,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:32,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902281774] [2020-10-11 12:47:32,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:32,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902281774] [2020-10-11 12:47:32,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713038206] [2020-10-11 12:47:32,895 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 [2020-10-11 12:47:32,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:32,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:32,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:32,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:34,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:34,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:34,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566401384] [2020-10-11 12:47:34,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:34,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:34,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:34,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:34,870 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-11 12:47:35,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:35,214 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-11 12:47:35,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:47:35,214 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:35,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:35,215 INFO L225 Difference]: With dead ends: 210 [2020-10-11 12:47:35,215 INFO L226 Difference]: Without dead ends: 208 [2020-10-11 12:47:35,216 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:47:35,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-11 12:47:35,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-11 12:47:35,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-11 12:47:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-11 12:47:35,219 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-11 12:47:35,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:35,220 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-11 12:47:35,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:35,220 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-11 12:47:35,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:35,220 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:35,220 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:35,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-11 12:47:35,424 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:35,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:35,424 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-11 12:47:35,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:35,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750236479] [2020-10-11 12:47:35,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:35,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750236479] [2020-10-11 12:47:35,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160801802] [2020-10-11 12:47:35,536 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 [2020-10-11 12:47:35,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 12:47:35,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:35,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:35,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:39,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:39,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:39,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178812492] [2020-10-11 12:47:39,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:39,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:39,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:39,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:47:39,198 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-11 12:47:43,418 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:47:43,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:43,686 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-11 12:47:43,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:47:43,687 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:43,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:43,688 INFO L225 Difference]: With dead ends: 218 [2020-10-11 12:47:43,688 INFO L226 Difference]: Without dead ends: 216 [2020-10-11 12:47:43,688 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-11 12:47:43,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-11 12:47:43,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-11 12:47:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-11 12:47:43,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-11 12:47:43,692 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-11 12:47:43,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:43,693 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-11 12:47:43,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:43,693 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-11 12:47:43,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:43,693 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:43,693 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:43,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:43,894 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:43,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:43,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-11 12:47:43,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:43,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432484339] [2020-10-11 12:47:43,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:44,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432484339] [2020-10-11 12:47:44,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020179099] [2020-10-11 12:47:44,018 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 [2020-10-11 12:47:44,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:44,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:44,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:44,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:44,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:44,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:44,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325354337] [2020-10-11 12:47:44,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:44,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:44,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:44,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:44,355 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-11 12:47:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:44,759 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-11 12:47:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:47:44,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:44,761 INFO L225 Difference]: With dead ends: 212 [2020-10-11 12:47:44,761 INFO L226 Difference]: Without dead ends: 210 [2020-10-11 12:47:44,762 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:47:44,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-11 12:47:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-11 12:47:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-11 12:47:44,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-11 12:47:44,765 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-11 12:47:44,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:44,765 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-11 12:47:44,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:44,766 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-11 12:47:44,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:44,766 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:44,766 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:44,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:44,974 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:44,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:44,975 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-11 12:47:44,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:44,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089159243] [2020-10-11 12:47:44,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:45,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089159243] [2020-10-11 12:47:45,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081728007] [2020-10-11 12:47:45,087 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 [2020-10-11 12:47:45,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:47:45,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:45,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:45,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:45,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:45,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:45,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24419393] [2020-10-11 12:47:45,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:45,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:45,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:45,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:45,313 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-11 12:47:45,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:45,649 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-11 12:47:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:47:45,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:45,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:45,651 INFO L225 Difference]: With dead ends: 212 [2020-10-11 12:47:45,651 INFO L226 Difference]: Without dead ends: 210 [2020-10-11 12:47:45,651 INFO L673 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 [2020-10-11 12:47:45,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-11 12:47:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-11 12:47:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-11 12:47:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-11 12:47:45,654 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-11 12:47:45,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:45,654 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-11 12:47:45,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:45,654 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-11 12:47:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:45,655 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:45,655 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:45,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:45,855 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:45,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:45,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-11 12:47:45,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:45,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599018447] [2020-10-11 12:47:45,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:45,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599018447] [2020-10-11 12:47:45,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562094738] [2020-10-11 12:47:45,968 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 [2020-10-11 12:47:46,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:47:46,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:46,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:46,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:46,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:46,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:46,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899073387] [2020-10-11 12:47:46,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:46,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:46,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:46,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:46,194 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-11 12:47:46,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:46,571 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-11 12:47:46,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:46,572 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:46,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:46,573 INFO L225 Difference]: With dead ends: 224 [2020-10-11 12:47:46,573 INFO L226 Difference]: Without dead ends: 222 [2020-10-11 12:47:46,574 INFO L673 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 [2020-10-11 12:47:46,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-11 12:47:46,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-11 12:47:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-11 12:47:46,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-11 12:47:46,577 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-11 12:47:46,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:46,577 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-11 12:47:46,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:46,578 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-11 12:47:46,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:46,578 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:46,578 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:46,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:46,780 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:46,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:46,781 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-11 12:47:46,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:46,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084935811] [2020-10-11 12:47:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:46,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084935811] [2020-10-11 12:47:46,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181871622] [2020-10-11 12:47:46,895 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 [2020-10-11 12:47:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:46,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:46,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:47,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:47,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:47,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685610617] [2020-10-11 12:47:47,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:47,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:47,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:47,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:47,096 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-11 12:47:47,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:47,417 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-11 12:47:47,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:47,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:47,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:47,419 INFO L225 Difference]: With dead ends: 218 [2020-10-11 12:47:47,419 INFO L226 Difference]: Without dead ends: 216 [2020-10-11 12:47:47,420 INFO L673 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 [2020-10-11 12:47:47,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-11 12:47:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-11 12:47:47,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-11 12:47:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-11 12:47:47,423 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-11 12:47:47,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:47,423 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-11 12:47:47,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-11 12:47:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:47,424 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:47,424 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:47,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:47,630 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:47,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:47,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-11 12:47:47,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:47,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913323162] [2020-10-11 12:47:47,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:47,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913323162] [2020-10-11 12:47:47,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37803569] [2020-10-11 12:47:47,743 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 [2020-10-11 12:47:47,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:47,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:47,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:47,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:47,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:47,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:47,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255373521] [2020-10-11 12:47:47,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:47,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:47,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:47,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:47,949 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-11 12:47:48,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:48,214 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-11 12:47:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:47:48,215 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:48,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:48,215 INFO L225 Difference]: With dead ends: 206 [2020-10-11 12:47:48,216 INFO L226 Difference]: Without dead ends: 204 [2020-10-11 12:47:48,216 INFO L673 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 [2020-10-11 12:47:48,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-11 12:47:48,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-11 12:47:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-11 12:47:48,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-11 12:47:48,219 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-11 12:47:48,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:48,219 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-11 12:47:48,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:48,219 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-11 12:47:48,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:48,220 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:48,220 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:48,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-11 12:47:48,421 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:48,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:48,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-11 12:47:48,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:48,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601443191] [2020-10-11 12:47:48,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:48,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601443191] [2020-10-11 12:47:48,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988374833] [2020-10-11 12:47:48,546 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 [2020-10-11 12:47:48,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:47:48,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:48,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:48,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:48,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:48,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:48,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697554067] [2020-10-11 12:47:48,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:48,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:48,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:48,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:48,754 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-11 12:47:49,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:49,032 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-10-11 12:47:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:47:49,033 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:49,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:49,034 INFO L225 Difference]: With dead ends: 207 [2020-10-11 12:47:49,034 INFO L226 Difference]: Without dead ends: 205 [2020-10-11 12:47:49,036 INFO L673 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 [2020-10-11 12:47:49,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-11 12:47:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-10-11 12:47:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-11 12:47:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-11 12:47:49,040 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-11 12:47:49,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:49,040 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-11 12:47:49,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-11 12:47:49,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:49,041 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:49,041 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:49,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-11 12:47:49,249 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:49,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:49,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-11 12:47:49,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:49,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756574208] [2020-10-11 12:47:49,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:49,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756574208] [2020-10-11 12:47:49,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456931665] [2020-10-11 12:47:49,370 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 [2020-10-11 12:47:49,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:49,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:49,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:49,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:49,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:49,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:49,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406153017] [2020-10-11 12:47:49,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:49,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:49,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:49,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:49,605 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-11 12:47:49,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:49,898 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-10-11 12:47:49,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:47:49,898 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:49,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:49,899 INFO L225 Difference]: With dead ends: 217 [2020-10-11 12:47:49,899 INFO L226 Difference]: Without dead ends: 215 [2020-10-11 12:47:49,899 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:47:49,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-11 12:47:49,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-10-11 12:47:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-11 12:47:49,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-11 12:47:49,901 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-11 12:47:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:49,902 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-11 12:47:49,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-11 12:47:49,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:49,902 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:49,902 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:50,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-11 12:47:50,103 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:50,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:50,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-11 12:47:50,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:50,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326695013] [2020-10-11 12:47:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:50,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326695013] [2020-10-11 12:47:50,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764266105] [2020-10-11 12:47:50,225 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 [2020-10-11 12:47:50,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:47:50,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:50,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:50,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:51,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:51,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:51,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883225682] [2020-10-11 12:47:51,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:51,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:51,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:51,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:51,930 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-11 12:47:52,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:52,336 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-10-11 12:47:52,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:52,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:52,338 INFO L225 Difference]: With dead ends: 223 [2020-10-11 12:47:52,338 INFO L226 Difference]: Without dead ends: 221 [2020-10-11 12:47:52,338 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:47:52,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-11 12:47:52,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-11 12:47:52,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:47:52,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-11 12:47:52,343 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-11 12:47:52,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:52,343 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-11 12:47:52,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-11 12:47:52,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:52,344 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:52,344 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:52,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-11 12:47:52,548 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:52,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:52,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-11 12:47:52,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:52,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534903555] [2020-10-11 12:47:52,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:52,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534903555] [2020-10-11 12:47:52,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352510022] [2020-10-11 12:47:52,676 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 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 [2020-10-11 12:47:52,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:47:52,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:52,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:52,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:52,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:52,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:52,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260843054] [2020-10-11 12:47:52,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:52,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:52,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:52,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:52,892 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-11 12:47:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:53,209 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-10-11 12:47:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:53,210 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:53,210 INFO L225 Difference]: With dead ends: 225 [2020-10-11 12:47:53,210 INFO L226 Difference]: Without dead ends: 223 [2020-10-11 12:47:53,211 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:47:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-11 12:47:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-10-11 12:47:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-11 12:47:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-11 12:47:53,213 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-11 12:47:53,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:53,214 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-11 12:47:53,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:53,214 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-11 12:47:53,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:53,214 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:53,214 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:53,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:53,415 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:53,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:53,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-11 12:47:53,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:53,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529361237] [2020-10-11 12:47:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:53,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529361237] [2020-10-11 12:47:53,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101024628] [2020-10-11 12:47:53,551 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 [2020-10-11 12:47:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:53,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:53,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:53,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:53,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:53,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846484858] [2020-10-11 12:47:53,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:53,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:53,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:53,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:53,789 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-11 12:47:54,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:54,105 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-10-11 12:47:54,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:47:54,106 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:54,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:54,107 INFO L225 Difference]: With dead ends: 214 [2020-10-11 12:47:54,107 INFO L226 Difference]: Without dead ends: 212 [2020-10-11 12:47:54,107 INFO L673 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 [2020-10-11 12:47:54,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-11 12:47:54,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-10-11 12:47:54,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-11 12:47:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-11 12:47:54,110 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-11 12:47:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:54,110 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-11 12:47:54,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:54,110 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-11 12:47:54,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:54,111 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:54,111 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:54,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:54,312 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:54,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:54,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-11 12:47:54,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:54,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715296324] [2020-10-11 12:47:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:54,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715296324] [2020-10-11 12:47:54,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107922904] [2020-10-11 12:47:54,472 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 [2020-10-11 12:47:54,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:47:54,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:54,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:54,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:54,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:54,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:54,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931697402] [2020-10-11 12:47:54,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:54,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:54,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:54,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:54,702 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-11 12:47:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:54,936 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-10-11 12:47:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:47:54,938 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:54,938 INFO L225 Difference]: With dead ends: 203 [2020-10-11 12:47:54,938 INFO L226 Difference]: Without dead ends: 201 [2020-10-11 12:47:54,939 INFO L673 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 [2020-10-11 12:47:54,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-11 12:47:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-10-11 12:47:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-11 12:47:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-11 12:47:54,942 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-11 12:47:54,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:54,942 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-11 12:47:54,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:54,942 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-11 12:47:54,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:54,942 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:54,942 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:55,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-11 12:47:55,143 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:55,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:55,144 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-11 12:47:55,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:55,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304070125] [2020-10-11 12:47:55,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:55,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304070125] [2020-10-11 12:47:55,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915122793] [2020-10-11 12:47:55,332 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 [2020-10-11 12:47:55,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:47:55,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:55,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:55,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:55,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:55,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25254294] [2020-10-11 12:47:55,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:55,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:55,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:55,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:55,552 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-11 12:47:55,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:55,636 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-11 12:47:55,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:47:55,637 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:55,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:55,638 INFO L225 Difference]: With dead ends: 212 [2020-10-11 12:47:55,638 INFO L226 Difference]: Without dead ends: 210 [2020-10-11 12:47:55,638 INFO L673 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 [2020-10-11 12:47:55,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-11 12:47:55,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-11 12:47:55,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:47:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-11 12:47:55,642 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-11 12:47:55,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:55,642 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-11 12:47:55,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-11 12:47:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:55,642 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:55,642 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:55,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:55,843 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:55,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:55,844 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-11 12:47:55,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:55,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758967451] [2020-10-11 12:47:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:56,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758967451] [2020-10-11 12:47:56,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119572810] [2020-10-11 12:47:56,017 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 [2020-10-11 12:47:56,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:47:56,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:56,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:56,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:56,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:56,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:56,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683624215] [2020-10-11 12:47:56,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:56,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:56,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:56,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:56,249 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-11 12:47:56,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:56,520 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-11 12:47:56,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:56,521 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:56,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:56,522 INFO L225 Difference]: With dead ends: 217 [2020-10-11 12:47:56,522 INFO L226 Difference]: Without dead ends: 215 [2020-10-11 12:47:56,523 INFO L673 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 [2020-10-11 12:47:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-11 12:47:56,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-11 12:47:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:47:56,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-11 12:47:56,527 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-11 12:47:56,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:56,527 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-11 12:47:56,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:56,528 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-11 12:47:56,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:56,528 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:56,528 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:56,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:56,738 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:56,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:56,738 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-11 12:47:56,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:56,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146208364] [2020-10-11 12:47:56,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:56,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146208364] [2020-10-11 12:47:56,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227770637] [2020-10-11 12:47:56,915 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 [2020-10-11 12:47:56,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:47:56,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:56,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:56,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:57,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:57,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:57,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409795237] [2020-10-11 12:47:57,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:57,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:57,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:57,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:57,270 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-11 12:47:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:57,626 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-11 12:47:57,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:47:57,627 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:57,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:57,628 INFO L225 Difference]: With dead ends: 227 [2020-10-11 12:47:57,628 INFO L226 Difference]: Without dead ends: 225 [2020-10-11 12:47:57,628 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:47:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-11 12:47:57,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-11 12:47:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:47:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-11 12:47:57,633 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-11 12:47:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:57,633 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-11 12:47:57,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-11 12:47:57,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:57,633 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:57,634 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:57,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:47:57,843 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:57,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:57,844 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-11 12:47:57,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:57,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063310177] [2020-10-11 12:47:57,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:57,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063310177] [2020-10-11 12:47:57,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200559263] [2020-10-11 12:47:57,983 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 [2020-10-11 12:47:58,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:47:58,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:47:58,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:58,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:47:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:58,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:47:58,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:47:58,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900791661] [2020-10-11 12:47:58,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:47:58,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:47:58,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:47:58,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:47:58,271 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-11 12:47:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:47:58,726 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-11 12:47:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:47:58,726 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:47:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:47:58,727 INFO L225 Difference]: With dead ends: 227 [2020-10-11 12:47:58,727 INFO L226 Difference]: Without dead ends: 225 [2020-10-11 12:47:58,727 INFO L673 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 [2020-10-11 12:47:58,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-11 12:47:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-10-11 12:47:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:47:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-11 12:47:58,730 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-11 12:47:58,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:47:58,730 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-11 12:47:58,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:47:58,730 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-11 12:47:58,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:47:58,730 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:47:58,731 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:47:58,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-11 12:47:58,932 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:47:58,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:47:58,933 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-11 12:47:58,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:47:58,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622127214] [2020-10-11 12:47:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:47:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:47:59,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622127214] [2020-10-11 12:47:59,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548698092] [2020-10-11 12:47:59,074 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 [2020-10-11 12:47:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:47:59,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:47:59,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:02,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:02,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:02,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439985642] [2020-10-11 12:48:02,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:02,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:02,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:02,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:48:02,084 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-11 12:48:06,322 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:48:06,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:06,630 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-10-11 12:48:06,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:48:06,631 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:06,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:06,631 INFO L225 Difference]: With dead ends: 237 [2020-10-11 12:48:06,632 INFO L226 Difference]: Without dead ends: 235 [2020-10-11 12:48:06,632 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-11 12:48:06,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-11 12:48:06,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-10-11 12:48:06,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-11 12:48:06,634 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-11 12:48:06,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:06,634 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-11 12:48:06,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:06,634 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-11 12:48:06,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:06,635 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:06,635 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:06,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-11 12:48:06,836 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:06,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:06,836 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-11 12:48:06,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:06,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832051706] [2020-10-11 12:48:06,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:06,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832051706] [2020-10-11 12:48:06,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983156916] [2020-10-11 12:48:06,971 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 [2020-10-11 12:48:07,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:07,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:07,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:07,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:07,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:07,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:07,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576644415] [2020-10-11 12:48:07,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:07,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:07,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:07,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:07,256 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-11 12:48:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:07,703 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-10-11 12:48:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:48:07,704 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:07,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:07,704 INFO L225 Difference]: With dead ends: 229 [2020-10-11 12:48:07,705 INFO L226 Difference]: Without dead ends: 227 [2020-10-11 12:48:07,705 INFO L673 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 [2020-10-11 12:48:07,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-11 12:48:07,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-11 12:48:07,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-11 12:48:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-10-11 12:48:07,709 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-10-11 12:48:07,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:07,709 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-10-11 12:48:07,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:07,709 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-10-11 12:48:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:07,710 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:07,710 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:07,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-11 12:48:07,910 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:07,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:07,911 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-11 12:48:07,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:07,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717326337] [2020-10-11 12:48:07,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:08,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717326337] [2020-10-11 12:48:08,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365547207] [2020-10-11 12:48:08,023 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 [2020-10-11 12:48:08,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:48:08,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:08,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:08,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:08,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:08,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:08,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15390874] [2020-10-11 12:48:08,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:08,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:08,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:08,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:08,234 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-10-11 12:48:08,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:08,709 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-10-11 12:48:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:48:08,710 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:08,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:08,710 INFO L225 Difference]: With dead ends: 225 [2020-10-11 12:48:08,710 INFO L226 Difference]: Without dead ends: 223 [2020-10-11 12:48:08,711 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:48:08,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-11 12:48:08,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-10-11 12:48:08,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:08,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-11 12:48:08,714 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-11 12:48:08,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:08,714 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-11 12:48:08,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-11 12:48:08,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:08,714 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:08,715 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:08,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-11 12:48:08,915 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:08,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:08,916 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-10-11 12:48:08,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:08,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316303281] [2020-10-11 12:48:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:09,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316303281] [2020-10-11 12:48:09,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226809162] [2020-10-11 12:48:09,029 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 [2020-10-11 12:48:09,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:48:09,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:09,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:09,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:09,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:09,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:09,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555274909] [2020-10-11 12:48:09,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:09,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:09,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:09,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:09,256 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-11 12:48:09,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:09,956 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-10-11 12:48:09,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:48:09,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:09,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:09,958 INFO L225 Difference]: With dead ends: 239 [2020-10-11 12:48:09,959 INFO L226 Difference]: Without dead ends: 237 [2020-10-11 12:48:09,959 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:48:09,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-11 12:48:09,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-11 12:48:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-11 12:48:09,962 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-11 12:48:09,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:09,962 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-11 12:48:09,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:09,963 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-11 12:48:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:09,963 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:09,963 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:10,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-11 12:48:10,171 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:10,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:10,172 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-10-11 12:48:10,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:10,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054270275] [2020-10-11 12:48:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:10,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054270275] [2020-10-11 12:48:10,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107767500] [2020-10-11 12:48:10,285 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 [2020-10-11 12:48:10,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:48:10,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:10,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:10,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:10,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:10,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:10,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016246552] [2020-10-11 12:48:10,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:10,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:10,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:10,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:10,497 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-11 12:48:10,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:10,864 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-10-11 12:48:10,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:48:10,865 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:10,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:10,865 INFO L225 Difference]: With dead ends: 234 [2020-10-11 12:48:10,865 INFO L226 Difference]: Without dead ends: 232 [2020-10-11 12:48:10,866 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:48:10,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-11 12:48:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-10-11 12:48:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:10,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-11 12:48:10,869 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-11 12:48:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:10,869 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-11 12:48:10,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-11 12:48:10,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:10,869 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:10,870 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:11,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-11 12:48:11,078 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:11,078 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-10-11 12:48:11,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:11,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709334968] [2020-10-11 12:48:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:11,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709334968] [2020-10-11 12:48:11,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874255640] [2020-10-11 12:48:11,191 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 [2020-10-11 12:48:11,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:48:11,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:11,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:11,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:11,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:11,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:11,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686964614] [2020-10-11 12:48:11,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:11,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:11,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:11,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:11,408 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-11 12:48:11,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:11,725 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-10-11 12:48:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:48:11,726 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:11,727 INFO L225 Difference]: With dead ends: 218 [2020-10-11 12:48:11,727 INFO L226 Difference]: Without dead ends: 216 [2020-10-11 12:48:11,727 INFO L673 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 [2020-10-11 12:48:11,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-11 12:48:11,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-10-11 12:48:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-11 12:48:11,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-10-11 12:48:11,731 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-10-11 12:48:11,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:11,731 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-10-11 12:48:11,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:11,731 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-10-11 12:48:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:11,731 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:11,731 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:11,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:11,932 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:11,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:11,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-10-11 12:48:11,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:11,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799796239] [2020-10-11 12:48:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:12,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799796239] [2020-10-11 12:48:12,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672485531] [2020-10-11 12:48:12,120 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 [2020-10-11 12:48:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:12,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:12,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:12,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:12,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:12,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861405915] [2020-10-11 12:48:12,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:12,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:12,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:12,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:12,389 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-10-11 12:48:12,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:12,504 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-10-11 12:48:12,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:48:12,505 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:12,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:12,505 INFO L225 Difference]: With dead ends: 208 [2020-10-11 12:48:12,505 INFO L226 Difference]: Without dead ends: 206 [2020-10-11 12:48:12,506 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:48:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-11 12:48:12,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-10-11 12:48:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-11 12:48:12,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-10-11 12:48:12,509 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-10-11 12:48:12,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:12,509 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-10-11 12:48:12,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:12,509 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-10-11 12:48:12,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:12,510 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:12,510 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:12,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:12,719 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:12,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:12,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-10-11 12:48:12,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:12,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573638350] [2020-10-11 12:48:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:12,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573638350] [2020-10-11 12:48:12,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984783210] [2020-10-11 12:48:12,862 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 [2020-10-11 12:48:12,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:12,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:12,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:12,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:13,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:13,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:13,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343586668] [2020-10-11 12:48:13,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:13,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:13,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:13,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:13,073 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-10-11 12:48:13,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:13,357 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-10-11 12:48:13,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:48:13,358 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:13,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:13,358 INFO L225 Difference]: With dead ends: 229 [2020-10-11 12:48:13,358 INFO L226 Difference]: Without dead ends: 227 [2020-10-11 12:48:13,359 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-11 12:48:13,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-11 12:48:13,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-10-11 12:48:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-11 12:48:13,362 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-11 12:48:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:13,364 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-11 12:48:13,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-11 12:48:13,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:13,365 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:13,365 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:13,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:13,566 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:13,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:13,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-10-11 12:48:13,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:13,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043608245] [2020-10-11 12:48:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:13,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043608245] [2020-10-11 12:48:13,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112904196] [2020-10-11 12:48:13,702 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 [2020-10-11 12:48:13,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:48:13,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:13,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:13,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:13,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:13,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:13,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383792081] [2020-10-11 12:48:13,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:13,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:13,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:13,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:13,976 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-11 12:48:14,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:14,336 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-10-11 12:48:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:48:14,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:14,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:14,337 INFO L225 Difference]: With dead ends: 235 [2020-10-11 12:48:14,337 INFO L226 Difference]: Without dead ends: 233 [2020-10-11 12:48:14,338 INFO L673 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 [2020-10-11 12:48:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-11 12:48:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-10-11 12:48:14,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-11 12:48:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-10-11 12:48:14,341 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-10-11 12:48:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:14,341 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-10-11 12:48:14,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:14,341 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-10-11 12:48:14,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:14,342 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:14,342 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:14,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:14,543 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:14,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:14,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-10-11 12:48:14,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:14,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558646005] [2020-10-11 12:48:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:14,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558646005] [2020-10-11 12:48:14,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921253921] [2020-10-11 12:48:14,657 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 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 [2020-10-11 12:48:14,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:48:14,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:14,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:14,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:14,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:14,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:14,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117214951] [2020-10-11 12:48:14,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:14,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:14,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:14,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:14,927 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-10-11 12:48:15,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:15,384 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-10-11 12:48:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:48:15,386 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:15,386 INFO L225 Difference]: With dead ends: 233 [2020-10-11 12:48:15,387 INFO L226 Difference]: Without dead ends: 231 [2020-10-11 12:48:15,387 INFO L673 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 [2020-10-11 12:48:15,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-11 12:48:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-10-11 12:48:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-11 12:48:15,391 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-11 12:48:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:15,391 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-11 12:48:15,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-11 12:48:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:15,392 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:15,392 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:15,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:15,600 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:15,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:15,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-10-11 12:48:15,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:15,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701527387] [2020-10-11 12:48:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:15,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701527387] [2020-10-11 12:48:15,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76215522] [2020-10-11 12:48:15,715 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 [2020-10-11 12:48:15,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:15,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:15,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:15,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:19,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:19,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:19,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193840673] [2020-10-11 12:48:19,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:19,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:19,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:19,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:48:19,487 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-11 12:48:23,786 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:48:24,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:24,134 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-10-11 12:48:24,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:48:24,135 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:24,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:24,136 INFO L225 Difference]: With dead ends: 241 [2020-10-11 12:48:24,136 INFO L226 Difference]: Without dead ends: 239 [2020-10-11 12:48:24,136 INFO L673 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 [2020-10-11 12:48:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-11 12:48:24,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-11 12:48:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-10-11 12:48:24,139 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-10-11 12:48:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:24,139 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-10-11 12:48:24,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:24,139 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-10-11 12:48:24,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:24,140 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:24,140 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:24,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:24,341 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:24,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:24,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-10-11 12:48:24,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:24,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345950972] [2020-10-11 12:48:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:24,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345950972] [2020-10-11 12:48:24,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90721488] [2020-10-11 12:48:24,462 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 [2020-10-11 12:48:24,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:48:24,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:24,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:24,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:24,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:24,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:24,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185175948] [2020-10-11 12:48:24,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:24,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:24,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:24,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:24,773 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-10-11 12:48:25,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:25,348 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-10-11 12:48:25,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:48:25,349 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:25,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:25,349 INFO L225 Difference]: With dead ends: 233 [2020-10-11 12:48:25,349 INFO L226 Difference]: Without dead ends: 231 [2020-10-11 12:48:25,350 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:48:25,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-11 12:48:25,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-10-11 12:48:25,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-11 12:48:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-10-11 12:48:25,352 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-10-11 12:48:25,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:25,352 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-10-11 12:48:25,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:25,353 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-10-11 12:48:25,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:25,353 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:25,353 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:25,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-11 12:48:25,554 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:25,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:25,554 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-10-11 12:48:25,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:25,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829861884] [2020-10-11 12:48:25,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:25,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829861884] [2020-10-11 12:48:25,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198473151] [2020-10-11 12:48:25,719 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 [2020-10-11 12:48:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:25,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:25,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:25,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:25,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:25,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591570658] [2020-10-11 12:48:25,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:25,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:25,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:25,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:25,923 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-10-11 12:48:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:26,072 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-10-11 12:48:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:48:26,073 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:26,073 INFO L225 Difference]: With dead ends: 204 [2020-10-11 12:48:26,073 INFO L226 Difference]: Without dead ends: 202 [2020-10-11 12:48:26,074 INFO L673 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 [2020-10-11 12:48:26,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-11 12:48:26,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-10-11 12:48:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:48:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-10-11 12:48:26,076 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-10-11 12:48:26,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:26,077 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-10-11 12:48:26,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:26,077 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-10-11 12:48:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:26,077 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:26,077 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:26,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:26,278 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:26,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:26,279 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-10-11 12:48:26,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:26,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258474597] [2020-10-11 12:48:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:26,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258474597] [2020-10-11 12:48:26,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119309765] [2020-10-11 12:48:26,410 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 [2020-10-11 12:48:26,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:26,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:26,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:26,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:26,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:26,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:26,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653530407] [2020-10-11 12:48:26,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:26,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:26,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:26,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:26,622 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-10-11 12:48:26,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:26,973 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-10-11 12:48:26,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:48:26,974 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:26,975 INFO L225 Difference]: With dead ends: 225 [2020-10-11 12:48:26,975 INFO L226 Difference]: Without dead ends: 223 [2020-10-11 12:48:26,975 INFO L673 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 [2020-10-11 12:48:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-11 12:48:26,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-10-11 12:48:26,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:48:26,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-10-11 12:48:26,978 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-10-11 12:48:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:26,978 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-10-11 12:48:26,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:26,978 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-10-11 12:48:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:26,979 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:26,979 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:27,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-11 12:48:27,180 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:27,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:27,180 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-10-11 12:48:27,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:27,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741476966] [2020-10-11 12:48:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:27,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741476966] [2020-10-11 12:48:27,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553044230] [2020-10-11 12:48:27,291 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 [2020-10-11 12:48:27,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:48:27,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:27,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:27,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:27,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:27,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:27,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905016651] [2020-10-11 12:48:27,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:27,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:27,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:27,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:27,603 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-10-11 12:48:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:28,145 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-10-11 12:48:28,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:48:28,146 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:28,147 INFO L225 Difference]: With dead ends: 231 [2020-10-11 12:48:28,147 INFO L226 Difference]: Without dead ends: 229 [2020-10-11 12:48:28,147 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:48:28,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-11 12:48:28,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-10-11 12:48:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-11 12:48:28,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-10-11 12:48:28,151 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-10-11 12:48:28,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:28,152 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-10-11 12:48:28,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:28,152 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-10-11 12:48:28,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:28,152 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:28,152 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:28,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:28,353 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:28,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:28,353 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-10-11 12:48:28,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:28,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657649586] [2020-10-11 12:48:28,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:28,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657649586] [2020-10-11 12:48:28,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946022155] [2020-10-11 12:48:28,481 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 [2020-10-11 12:48:28,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:48:28,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:28,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:28,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:28,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:28,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:28,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965437053] [2020-10-11 12:48:28,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:28,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:28,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:28,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:28,706 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-10-11 12:48:28,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:28,886 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-10-11 12:48:28,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:48:28,887 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:28,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:28,887 INFO L225 Difference]: With dead ends: 200 [2020-10-11 12:48:28,887 INFO L226 Difference]: Without dead ends: 198 [2020-10-11 12:48:28,888 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-11 12:48:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-11 12:48:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-10-11 12:48:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-10-11 12:48:28,891 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-10-11 12:48:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:28,891 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-10-11 12:48:28,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:28,891 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-10-11 12:48:28,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:28,892 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:28,892 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:29,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:29,094 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:29,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:29,095 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-10-11 12:48:29,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:29,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416861640] [2020-10-11 12:48:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:29,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416861640] [2020-10-11 12:48:29,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976383244] [2020-10-11 12:48:29,214 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 [2020-10-11 12:48:29,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:48:29,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:29,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:29,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:29,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:29,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:29,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317115124] [2020-10-11 12:48:29,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:29,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:29,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:29,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:29,437 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-10-11 12:48:29,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:29,818 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-10-11 12:48:29,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:48:29,819 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:29,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:29,820 INFO L225 Difference]: With dead ends: 221 [2020-10-11 12:48:29,820 INFO L226 Difference]: Without dead ends: 219 [2020-10-11 12:48:29,820 INFO L673 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 [2020-10-11 12:48:29,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-11 12:48:29,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-10-11 12:48:29,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:48:29,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-10-11 12:48:29,823 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-10-11 12:48:29,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:29,823 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-10-11 12:48:29,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:29,823 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-10-11 12:48:29,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:29,824 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:29,824 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:30,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-11 12:48:30,032 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:30,032 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-10-11 12:48:30,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:30,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531925755] [2020-10-11 12:48:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:30,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531925755] [2020-10-11 12:48:30,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811682064] [2020-10-11 12:48:30,157 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 [2020-10-11 12:48:30,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:48:30,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:30,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:30,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:30,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:30,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:30,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670022007] [2020-10-11 12:48:30,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:30,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:30,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:30,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:30,388 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 17 states. [2020-10-11 12:48:30,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:30,612 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-10-11 12:48:30,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:48:30,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:30,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:30,614 INFO L225 Difference]: With dead ends: 201 [2020-10-11 12:48:30,614 INFO L226 Difference]: Without dead ends: 199 [2020-10-11 12:48:30,614 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-11 12:48:30,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-11 12:48:30,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-10-11 12:48:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:48:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-11 12:48:30,617 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-11 12:48:30,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:30,617 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-11 12:48:30,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:30,617 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-11 12:48:30,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:30,618 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:30,618 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:30,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:30,818 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:30,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:30,819 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-10-11 12:48:30,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:30,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462128630] [2020-10-11 12:48:30,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:30,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462128630] [2020-10-11 12:48:30,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284246095] [2020-10-11 12:48:30,919 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 [2020-10-11 12:48:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:30,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:30,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:31,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:48:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:31,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:31,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:31,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343138141] [2020-10-11 12:48:31,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:31,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:31,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:31,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:31,174 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-11 12:48:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:31,695 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-10-11 12:48:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:48:31,696 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:31,696 INFO L225 Difference]: With dead ends: 226 [2020-10-11 12:48:31,696 INFO L226 Difference]: Without dead ends: 221 [2020-10-11 12:48:31,697 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:48:31,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-11 12:48:31,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-10-11 12:48:31,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:48:31,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-11 12:48:31,700 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-11 12:48:31,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:31,700 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-11 12:48:31,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:31,701 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-11 12:48:31,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:31,701 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:31,701 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:31,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:31,902 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:31,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:31,902 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-10-11 12:48:31,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:31,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628671558] [2020-10-11 12:48:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:32,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628671558] [2020-10-11 12:48:32,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212618388] [2020-10-11 12:48:32,002 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 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 [2020-10-11 12:48:32,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:32,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:32,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:32,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:32,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:32,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:32,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728160539] [2020-10-11 12:48:32,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:32,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:32,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:32,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:32,250 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-11 12:48:32,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:32,666 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-11 12:48:32,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:48:32,666 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:32,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:32,667 INFO L225 Difference]: With dead ends: 218 [2020-10-11 12:48:32,667 INFO L226 Difference]: Without dead ends: 216 [2020-10-11 12:48:32,667 INFO L673 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 [2020-10-11 12:48:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-11 12:48:32,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-10-11 12:48:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:48:32,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-11 12:48:32,669 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-11 12:48:32,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:32,669 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-11 12:48:32,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:32,670 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-11 12:48:32,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:32,670 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:32,670 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:32,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:32,871 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:32,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:32,871 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-10-11 12:48:32,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:32,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254830310] [2020-10-11 12:48:32,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:32,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254830310] [2020-10-11 12:48:32,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666610784] [2020-10-11 12:48:32,975 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 [2020-10-11 12:48:33,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:48:33,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:33,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:33,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:33,201 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:48:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:33,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:33,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:33,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146159766] [2020-10-11 12:48:33,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:33,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:33,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:33,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:33,234 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-11 12:48:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:33,925 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-10-11 12:48:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:48:33,926 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:33,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:33,927 INFO L225 Difference]: With dead ends: 248 [2020-10-11 12:48:33,927 INFO L226 Difference]: Without dead ends: 243 [2020-10-11 12:48:33,927 INFO L673 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 [2020-10-11 12:48:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-11 12:48:33,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-10-11 12:48:33,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:48:33,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-11 12:48:33,931 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-11 12:48:33,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:33,931 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-11 12:48:33,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:33,931 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-11 12:48:33,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:33,931 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:33,932 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:34,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:34,132 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:34,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:34,133 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-10-11 12:48:34,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:34,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134786053] [2020-10-11 12:48:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:34,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134786053] [2020-10-11 12:48:34,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917653446] [2020-10-11 12:48:34,240 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 [2020-10-11 12:48:34,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:48:34,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:34,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:34,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:34,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:48:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:34,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:34,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:34,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072082397] [2020-10-11 12:48:34,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:34,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:34,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:34,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:34,474 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-11 12:48:35,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:35,017 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-10-11 12:48:35,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:48:35,018 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:35,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:35,019 INFO L225 Difference]: With dead ends: 238 [2020-10-11 12:48:35,019 INFO L226 Difference]: Without dead ends: 233 [2020-10-11 12:48:35,019 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:48:35,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-11 12:48:35,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-11 12:48:35,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:48:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-11 12:48:35,023 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-11 12:48:35,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:35,023 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-11 12:48:35,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:35,023 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-11 12:48:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:35,023 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:35,024 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:35,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:35,224 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:35,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:35,225 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-10-11 12:48:35,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:35,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711608635] [2020-10-11 12:48:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:35,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711608635] [2020-10-11 12:48:35,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388240587] [2020-10-11 12:48:35,343 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 [2020-10-11 12:48:35,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:48:35,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:35,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:35,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:35,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:35,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:35,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644674491] [2020-10-11 12:48:35,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:35,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:35,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:35,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:35,667 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-11 12:48:36,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:36,344 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-10-11 12:48:36,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:48:36,345 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:36,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:36,346 INFO L225 Difference]: With dead ends: 235 [2020-10-11 12:48:36,346 INFO L226 Difference]: Without dead ends: 233 [2020-10-11 12:48:36,346 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:48:36,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-11 12:48:36,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-10-11 12:48:36,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:48:36,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-11 12:48:36,350 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-11 12:48:36,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:36,350 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-11 12:48:36,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:36,351 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-11 12:48:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:36,351 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:36,351 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:36,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:36,559 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:36,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:36,560 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-10-11 12:48:36,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:36,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242081331] [2020-10-11 12:48:36,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:36,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242081331] [2020-10-11 12:48:36,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340733778] [2020-10-11 12:48:36,671 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 [2020-10-11 12:48:36,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:48:36,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:36,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:36,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:36,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:36,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:36,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071215534] [2020-10-11 12:48:36,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:36,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:36,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:36,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:36,976 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-11 12:48:37,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:37,680 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-10-11 12:48:37,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:48:37,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:37,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:37,682 INFO L225 Difference]: With dead ends: 252 [2020-10-11 12:48:37,683 INFO L226 Difference]: Without dead ends: 250 [2020-10-11 12:48:37,683 INFO L673 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 [2020-10-11 12:48:37,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-11 12:48:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-10-11 12:48:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:48:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-11 12:48:37,687 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-11 12:48:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:37,687 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-11 12:48:37,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-11 12:48:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:37,688 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:37,688 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:37,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-11 12:48:37,889 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:37,889 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-10-11 12:48:37,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:37,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712471636] [2020-10-11 12:48:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:38,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712471636] [2020-10-11 12:48:38,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972341645] [2020-10-11 12:48:38,006 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 [2020-10-11 12:48:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:38,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:38,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:38,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:48:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:38,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:38,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:38,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154613825] [2020-10-11 12:48:38,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:38,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:38,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:38,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:38,337 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-11 12:48:39,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:39,184 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-10-11 12:48:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:48:39,185 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:39,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:39,186 INFO L225 Difference]: With dead ends: 258 [2020-10-11 12:48:39,186 INFO L226 Difference]: Without dead ends: 253 [2020-10-11 12:48:39,186 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:48:39,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-11 12:48:39,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-11 12:48:39,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:48:39,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-11 12:48:39,190 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-11 12:48:39,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:39,190 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-11 12:48:39,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:39,190 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-11 12:48:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:39,190 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:39,191 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:39,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-11 12:48:39,392 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:39,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:39,393 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-10-11 12:48:39,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:39,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923462136] [2020-10-11 12:48:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:39,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923462136] [2020-10-11 12:48:39,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955742281] [2020-10-11 12:48:39,507 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 [2020-10-11 12:48:39,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:39,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:39,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:39,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:41,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:48:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:41,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:41,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:41,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077163441] [2020-10-11 12:48:41,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:41,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:41,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:41,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:48:41,870 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-11 12:48:46,168 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-11 12:48:50,442 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-11 12:48:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:51,065 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-10-11 12:48:51,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:48:51,066 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:51,067 INFO L225 Difference]: With dead ends: 287 [2020-10-11 12:48:51,067 INFO L226 Difference]: Without dead ends: 279 [2020-10-11 12:48:51,067 INFO L673 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 [2020-10-11 12:48:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-11 12:48:51,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-10-11 12:48:51,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:48:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-10-11 12:48:51,071 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-10-11 12:48:51,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:51,072 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-10-11 12:48:51,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-10-11 12:48:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:51,072 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:51,072 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:51,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-11 12:48:51,277 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:51,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:51,278 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-10-11 12:48:51,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:51,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582683513] [2020-10-11 12:48:51,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:51,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582683513] [2020-10-11 12:48:51,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570727336] [2020-10-11 12:48:51,408 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 [2020-10-11 12:48:51,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:48:51,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:51,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:51,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:51,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:48:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:51,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:51,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:51,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613087029] [2020-10-11 12:48:51,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:51,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:51,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:51,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:51,826 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 17 states. [2020-10-11 12:48:52,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:52,925 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2020-10-11 12:48:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:48:52,926 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:52,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:52,926 INFO L225 Difference]: With dead ends: 260 [2020-10-11 12:48:52,926 INFO L226 Difference]: Without dead ends: 255 [2020-10-11 12:48:52,927 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:48:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-11 12:48:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-10-11 12:48:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-11 12:48:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-10-11 12:48:52,930 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-10-11 12:48:52,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:52,930 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-10-11 12:48:52,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:52,930 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-10-11 12:48:52,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:52,931 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:52,931 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:53,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:53,132 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:53,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:53,132 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-10-11 12:48:53,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:53,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658215115] [2020-10-11 12:48:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:53,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658215115] [2020-10-11 12:48:53,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348714599] [2020-10-11 12:48:53,242 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 [2020-10-11 12:48:53,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:48:53,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:53,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:53,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:53,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:53,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:53,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222102662] [2020-10-11 12:48:53,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:53,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:53,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:53,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:48:53,533 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-10-11 12:48:54,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:48:54,030 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-10-11 12:48:54,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:48:54,031 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:48:54,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:48:54,031 INFO L225 Difference]: With dead ends: 235 [2020-10-11 12:48:54,031 INFO L226 Difference]: Without dead ends: 233 [2020-10-11 12:48:54,032 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:48:54,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-11 12:48:54,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-10-11 12:48:54,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:48:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-10-11 12:48:54,035 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-10-11 12:48:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:48:54,035 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-10-11 12:48:54,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:48:54,035 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-10-11 12:48:54,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:48:54,035 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:48:54,036 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:48:54,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:48:54,236 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:48:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:48:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-10-11 12:48:54,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:48:54,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943517555] [2020-10-11 12:48:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:48:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:48:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:54,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943517555] [2020-10-11 12:48:54,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864621458] [2020-10-11 12:48:54,336 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 [2020-10-11 12:48:54,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:48:54,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:48:54,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:48:54,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:48:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:48:59,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:48:59,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:48:59,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991275230] [2020-10-11 12:48:59,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:48:59,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:48:59,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:48:59,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:48:59,291 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-10-11 12:49:03,624 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:49:12,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:12,060 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-10-11 12:49:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:49:12,061 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:12,062 INFO L225 Difference]: With dead ends: 241 [2020-10-11 12:49:12,062 INFO L226 Difference]: Without dead ends: 239 [2020-10-11 12:49:12,062 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=193, Invalid=507, Unknown=2, NotChecked=0, Total=702 [2020-10-11 12:49:12,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-11 12:49:12,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-11 12:49:12,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:49:12,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-10-11 12:49:12,065 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-10-11 12:49:12,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:12,066 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-10-11 12:49:12,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:12,066 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-10-11 12:49:12,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:12,066 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:12,066 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:12,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-11 12:49:12,267 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:12,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:12,267 INFO L82 PathProgramCache]: Analyzing trace with hash -763559652, now seen corresponding path program 162 times [2020-10-11 12:49:12,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:12,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216982951] [2020-10-11 12:49:12,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:12,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216982951] [2020-10-11 12:49:12,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819510823] [2020-10-11 12:49:12,382 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 [2020-10-11 12:49:12,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:49:12,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:12,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:12,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:12,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:12,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:12,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377708023] [2020-10-11 12:49:12,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:12,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:12,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:12,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:12,725 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-10-11 12:49:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:13,265 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-10-11 12:49:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:49:13,265 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:13,266 INFO L225 Difference]: With dead ends: 235 [2020-10-11 12:49:13,266 INFO L226 Difference]: Without dead ends: 233 [2020-10-11 12:49:13,266 INFO L673 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 [2020-10-11 12:49:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-11 12:49:13,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-11 12:49:13,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:49:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-11 12:49:13,269 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-11 12:49:13,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:13,270 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-11 12:49:13,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:13,270 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-11 12:49:13,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:13,270 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:13,270 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:13,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:13,479 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:13,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:13,480 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 163 times [2020-10-11 12:49:13,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:13,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688147169] [2020-10-11 12:49:13,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:13,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688147169] [2020-10-11 12:49:13,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274752876] [2020-10-11 12:49:13,601 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 [2020-10-11 12:49:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:13,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:13,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:13,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:13,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:13,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864444597] [2020-10-11 12:49:13,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:13,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:13,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:13,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:13,880 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-11 12:49:14,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:14,705 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-10-11 12:49:14,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:49:14,706 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:14,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:14,707 INFO L225 Difference]: With dead ends: 254 [2020-10-11 12:49:14,707 INFO L226 Difference]: Without dead ends: 252 [2020-10-11 12:49:14,707 INFO L673 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 [2020-10-11 12:49:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-11 12:49:14,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-10-11 12:49:14,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:49:14,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-10-11 12:49:14,710 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-10-11 12:49:14,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:14,710 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-10-11 12:49:14,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:14,710 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-10-11 12:49:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:14,710 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:14,710 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:14,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-11 12:49:14,911 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:14,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:14,912 INFO L82 PathProgramCache]: Analyzing trace with hash -743032692, now seen corresponding path program 164 times [2020-10-11 12:49:14,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:14,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639789815] [2020-10-11 12:49:14,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:15,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639789815] [2020-10-11 12:49:15,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70425405] [2020-10-11 12:49:15,023 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 [2020-10-11 12:49:15,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:49:15,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:15,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:15,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:16,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:16,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:16,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365971551] [2020-10-11 12:49:16,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:16,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:16,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:16,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:16,242 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-10-11 12:49:20,664 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:49:35,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:35,480 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-10-11 12:49:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:49:35,481 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:35,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:35,482 INFO L225 Difference]: With dead ends: 264 [2020-10-11 12:49:35,482 INFO L226 Difference]: Without dead ends: 262 [2020-10-11 12:49:35,482 INFO L673 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 [2020-10-11 12:49:35,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-11 12:49:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-10-11 12:49:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-11 12:49:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-11 12:49:35,486 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-11 12:49:35,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:35,486 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-11 12:49:35,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-11 12:49:35,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:35,486 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:35,486 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:35,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:35,687 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:35,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:35,688 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 165 times [2020-10-11 12:49:35,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:35,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148932043] [2020-10-11 12:49:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:35,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148932043] [2020-10-11 12:49:35,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725105172] [2020-10-11 12:49:35,817 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 [2020-10-11 12:49:35,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:49:35,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:35,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:35,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:37,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:37,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:37,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693737886] [2020-10-11 12:49:37,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:37,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:37,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:37,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:37,335 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-11 12:49:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:38,117 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-10-11 12:49:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:49:38,118 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:38,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:38,118 INFO L225 Difference]: With dead ends: 255 [2020-10-11 12:49:38,119 INFO L226 Difference]: Without dead ends: 253 [2020-10-11 12:49:38,119 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:49:38,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-11 12:49:38,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-11 12:49:38,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:49:38,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-11 12:49:38,121 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-11 12:49:38,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:38,122 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-11 12:49:38,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-11 12:49:38,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:38,122 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:38,122 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:38,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:49:38,323 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:38,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:38,323 INFO L82 PathProgramCache]: Analyzing trace with hash -742349204, now seen corresponding path program 166 times [2020-10-11 12:49:38,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:38,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363871114] [2020-10-11 12:49:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:38,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363871114] [2020-10-11 12:49:38,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350612423] [2020-10-11 12:49:38,448 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 [2020-10-11 12:49:38,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:49:38,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:38,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:38,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:38,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:49:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:38,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:38,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:38,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97259034] [2020-10-11 12:49:38,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:38,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:38,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:38,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:38,786 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-11 12:49:39,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:39,879 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-10-11 12:49:39,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:49:39,880 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:39,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:39,881 INFO L225 Difference]: With dead ends: 256 [2020-10-11 12:49:39,881 INFO L226 Difference]: Without dead ends: 251 [2020-10-11 12:49:39,882 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:49:39,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-11 12:49:39,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-10-11 12:49:39,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:49:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-11 12:49:39,886 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-11 12:49:39,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:39,886 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-11 12:49:39,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:39,886 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-11 12:49:39,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:39,886 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:39,887 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:40,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-11 12:49:40,087 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:40,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:40,088 INFO L82 PathProgramCache]: Analyzing trace with hash -742348243, now seen corresponding path program 167 times [2020-10-11 12:49:40,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:40,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297989245] [2020-10-11 12:49:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:40,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297989245] [2020-10-11 12:49:40,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760260898] [2020-10-11 12:49:40,212 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 [2020-10-11 12:49:40,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:49:40,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:40,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:40,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:40,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:40,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:40,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:40,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:40,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:40,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:40,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:40,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:49:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:40,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:40,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:40,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413268586] [2020-10-11 12:49:40,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:40,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:40,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:40,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:49:40,611 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-11 12:49:42,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:42,163 INFO L93 Difference]: Finished difference Result 279 states and 667 transitions. [2020-10-11 12:49:42,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:49:42,164 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:42,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:42,164 INFO L225 Difference]: With dead ends: 279 [2020-10-11 12:49:42,164 INFO L226 Difference]: Without dead ends: 274 [2020-10-11 12:49:42,164 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:49:42,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-11 12:49:42,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 165. [2020-10-11 12:49:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-11 12:49:42,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-11 12:49:42,167 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-11 12:49:42,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:42,167 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-11 12:49:42,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:42,167 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-11 12:49:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:42,168 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:42,168 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:42,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-11 12:49:42,369 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:42,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:42,369 INFO L82 PathProgramCache]: Analyzing trace with hash -742340772, now seen corresponding path program 168 times [2020-10-11 12:49:42,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:42,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30850899] [2020-10-11 12:49:42,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:42,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30850899] [2020-10-11 12:49:42,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565032033] [2020-10-11 12:49:42,492 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 [2020-10-11 12:49:42,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:49:42,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:49:42,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:42,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:49:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:45,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:49:45,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:49:45,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465338493] [2020-10-11 12:49:45,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:49:45,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:49:45,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:49:45,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:49:45,935 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-11 12:49:50,322 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-11 12:49:54,573 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:49:55,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:49:55,292 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-10-11 12:49:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 12:49:55,293 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:49:55,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:49:55,293 INFO L225 Difference]: With dead ends: 271 [2020-10-11 12:49:55,293 INFO L226 Difference]: Without dead ends: 269 [2020-10-11 12:49:55,294 INFO L673 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 [2020-10-11 12:49:55,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-11 12:49:55,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-10-11 12:49:55,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:49:55,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-11 12:49:55,296 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-11 12:49:55,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:49:55,297 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-11 12:49:55,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:49:55,297 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-11 12:49:55,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:49:55,297 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:49:55,297 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:49:55,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-11 12:49:55,498 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:49:55,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:49:55,498 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 169 times [2020-10-11 12:49:55,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:49:55,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831071436] [2020-10-11 12:49:55,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:49:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:49:55,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831071436] [2020-10-11 12:49:55,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52962251] [2020-10-11 12:49:55,639 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 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 [2020-10-11 12:49:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:49:55,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:49:55,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:02,313 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-11 12:50:02,318 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:50:02,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:50:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:02,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:02,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:02,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433205393] [2020-10-11 12:50:02,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:02,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:02,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:02,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=182, Unknown=3, NotChecked=0, Total=272 [2020-10-11 12:50:02,384 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-11 12:50:06,772 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-11 12:50:11,085 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-11 12:50:24,889 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-11 12:50:33,899 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-11 12:50:36,833 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-11 12:50:37,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:37,001 INFO L93 Difference]: Finished difference Result 299 states and 714 transitions. [2020-10-11 12:50:37,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:50:37,003 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:37,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:37,004 INFO L225 Difference]: With dead ends: 299 [2020-10-11 12:50:37,004 INFO L226 Difference]: Without dead ends: 291 [2020-10-11 12:50:37,004 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=434, Invalid=964, Unknown=8, NotChecked=0, Total=1406 [2020-10-11 12:50:37,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-11 12:50:37,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 168. [2020-10-11 12:50:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-11 12:50:37,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-10-11 12:50:37,007 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-10-11 12:50:37,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:37,007 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-10-11 12:50:37,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:37,007 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-10-11 12:50:37,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:37,008 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:37,008 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:37,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-10-11 12:50:37,209 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:37,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:37,209 INFO L82 PathProgramCache]: Analyzing trace with hash -742318452, now seen corresponding path program 170 times [2020-10-11 12:50:37,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:37,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105722452] [2020-10-11 12:50:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:37,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105722452] [2020-10-11 12:50:37,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54356912] [2020-10-11 12:50:37,365 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 [2020-10-11 12:50:37,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:50:37,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:37,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:37,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:39,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:50:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:39,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:39,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:39,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304084210] [2020-10-11 12:50:39,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:39,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:39,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:39,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-10-11 12:50:39,784 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-10-11 12:50:41,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:41,707 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-10-11 12:50:41,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:50:41,709 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:41,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:41,709 INFO L225 Difference]: With dead ends: 292 [2020-10-11 12:50:41,709 INFO L226 Difference]: Without dead ends: 284 [2020-10-11 12:50:41,710 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-10-11 12:50:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-11 12:50:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-10-11 12:50:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:50:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-11 12:50:41,713 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-11 12:50:41,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:41,713 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-11 12:50:41,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-11 12:50:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:41,714 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:41,714 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:41,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-11 12:50:41,915 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:41,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:41,915 INFO L82 PathProgramCache]: Analyzing trace with hash -742110132, now seen corresponding path program 171 times [2020-10-11 12:50:41,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:41,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881071349] [2020-10-11 12:50:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:42,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881071349] [2020-10-11 12:50:42,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809708281] [2020-10-11 12:50:42,054 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 [2020-10-11 12:50:42,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:50:42,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:42,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:42,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:42,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:42,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:42,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348012897] [2020-10-11 12:50:42,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:42,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:42,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:42,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:42,416 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-11 12:50:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:43,049 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-10-11 12:50:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:50:43,050 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:43,050 INFO L225 Difference]: With dead ends: 231 [2020-10-11 12:50:43,051 INFO L226 Difference]: Without dead ends: 229 [2020-10-11 12:50:43,051 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:50:43,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-11 12:50:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-10-11 12:50:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:50:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-11 12:50:43,054 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-11 12:50:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:43,055 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-11 12:50:43,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-11 12:50:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:43,055 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:43,055 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:43,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-10-11 12:50:43,256 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:43,256 INFO L82 PathProgramCache]: Analyzing trace with hash -741447042, now seen corresponding path program 172 times [2020-10-11 12:50:43,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:43,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333401446] [2020-10-11 12:50:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:43,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333401446] [2020-10-11 12:50:43,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245708090] [2020-10-11 12:50:43,410 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 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 [2020-10-11 12:50:43,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:50:43,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:43,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:43,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:43,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:43,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:43,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828366421] [2020-10-11 12:50:43,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:43,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:43,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:43,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:43,778 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-11 12:50:44,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:44,695 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-10-11 12:50:44,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:50:44,696 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:44,697 INFO L225 Difference]: With dead ends: 250 [2020-10-11 12:50:44,697 INFO L226 Difference]: Without dead ends: 248 [2020-10-11 12:50:44,698 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:50:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-11 12:50:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-10-11 12:50:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:50:44,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-10-11 12:50:44,701 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-10-11 12:50:44,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:44,701 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-10-11 12:50:44,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:44,701 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-10-11 12:50:44,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:44,701 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:44,701 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:44,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:44,902 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:44,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:44,903 INFO L82 PathProgramCache]: Analyzing trace with hash -741424722, now seen corresponding path program 173 times [2020-10-11 12:50:44,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:44,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656533979] [2020-10-11 12:50:44,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:45,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656533979] [2020-10-11 12:50:45,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213720018] [2020-10-11 12:50:45,050 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 [2020-10-11 12:50:45,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:50:45,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:45,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:45,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:45,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:50:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:45,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:45,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:45,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463838509] [2020-10-11 12:50:45,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:45,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:45,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:45,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:45,412 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-10-11 12:50:47,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:47,010 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-10-11 12:50:47,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:50:47,012 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:47,012 INFO L225 Difference]: With dead ends: 288 [2020-10-11 12:50:47,012 INFO L226 Difference]: Without dead ends: 283 [2020-10-11 12:50:47,013 INFO L673 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 [2020-10-11 12:50:47,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-11 12:50:47,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-10-11 12:50:47,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-11 12:50:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-10-11 12:50:47,016 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-10-11 12:50:47,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:47,016 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-10-11 12:50:47,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:47,016 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-10-11 12:50:47,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:47,017 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:47,017 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:47,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-10-11 12:50:47,218 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:47,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:47,218 INFO L82 PathProgramCache]: Analyzing trace with hash -541944403, now seen corresponding path program 174 times [2020-10-11 12:50:47,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:47,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278513144] [2020-10-11 12:50:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:47,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278513144] [2020-10-11 12:50:47,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861062653] [2020-10-11 12:50:47,355 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 [2020-10-11 12:50:47,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:50:47,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:47,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:47,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:47,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:47,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:47,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668544716] [2020-10-11 12:50:47,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:47,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:47,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:47,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:47,647 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-10-11 12:50:48,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:48,179 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-10-11 12:50:48,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:50:48,180 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:48,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:48,181 INFO L225 Difference]: With dead ends: 236 [2020-10-11 12:50:48,181 INFO L226 Difference]: Without dead ends: 234 [2020-10-11 12:50:48,181 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:50:48,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-11 12:50:48,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-10-11 12:50:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:50:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-11 12:50:48,184 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-11 12:50:48,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:48,184 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-11 12:50:48,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:48,184 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-11 12:50:48,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:48,184 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:48,184 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:48,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:48,385 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:48,386 INFO L82 PathProgramCache]: Analyzing trace with hash -541943442, now seen corresponding path program 175 times [2020-10-11 12:50:48,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:48,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203338298] [2020-10-11 12:50:48,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:48,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203338298] [2020-10-11 12:50:48,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149143837] [2020-10-11 12:50:48,514 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 [2020-10-11 12:50:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:48,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:48,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:48,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:48,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:48,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960671435] [2020-10-11 12:50:48,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:48,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:48,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:48,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:48,827 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-11 12:50:49,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:49,437 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-10-11 12:50:49,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:50:49,439 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:49,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:49,440 INFO L225 Difference]: With dead ends: 246 [2020-10-11 12:50:49,440 INFO L226 Difference]: Without dead ends: 244 [2020-10-11 12:50:49,440 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:50:49,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-11 12:50:49,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-10-11 12:50:49,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:50:49,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-11 12:50:49,443 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-11 12:50:49,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:49,443 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-11 12:50:49,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:49,444 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-11 12:50:49,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:49,444 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:49,444 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:49,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:49,645 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:49,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:49,645 INFO L82 PathProgramCache]: Analyzing trace with hash -541914612, now seen corresponding path program 176 times [2020-10-11 12:50:49,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:49,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401934344] [2020-10-11 12:50:49,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:49,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401934344] [2020-10-11 12:50:49,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42407737] [2020-10-11 12:50:49,777 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 [2020-10-11 12:50:49,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:50:49,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:49,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:49,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:50,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:50,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:50,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480302323] [2020-10-11 12:50:50,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:50,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:50,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:50,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:50,071 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-11 12:50:50,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:50,801 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-10-11 12:50:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:50:50,804 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:50,805 INFO L225 Difference]: With dead ends: 239 [2020-10-11 12:50:50,805 INFO L226 Difference]: Without dead ends: 237 [2020-10-11 12:50:50,806 INFO L673 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 [2020-10-11 12:50:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-11 12:50:50,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-11 12:50:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:50:50,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-11 12:50:50,811 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-11 12:50:50,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:50,811 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-11 12:50:50,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-11 12:50:50,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:50,812 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:50,813 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:51,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:51,025 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:51,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:51,026 INFO L82 PathProgramCache]: Analyzing trace with hash -540990130, now seen corresponding path program 177 times [2020-10-11 12:50:51,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:51,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579594672] [2020-10-11 12:50:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:51,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579594672] [2020-10-11 12:50:51,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397166833] [2020-10-11 12:50:51,162 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 [2020-10-11 12:50:51,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:50:51,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:51,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:51,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:51,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:51,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:51,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107199519] [2020-10-11 12:50:51,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:51,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:51,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:51,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:51,470 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-11 12:50:51,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:51,953 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-10-11 12:50:51,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:50:51,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:51,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:51,955 INFO L225 Difference]: With dead ends: 229 [2020-10-11 12:50:51,955 INFO L226 Difference]: Without dead ends: 227 [2020-10-11 12:50:51,955 INFO L673 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 [2020-10-11 12:50:51,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-11 12:50:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-11 12:50:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-11 12:50:51,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-11 12:50:51,958 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-11 12:50:51,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:51,959 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-11 12:50:51,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:51,959 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-11 12:50:51,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:51,959 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:51,959 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:52,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-11 12:50:52,160 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:52,160 INFO L82 PathProgramCache]: Analyzing trace with hash 95285087, now seen corresponding path program 178 times [2020-10-11 12:50:52,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:52,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182028049] [2020-10-11 12:50:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:52,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182028049] [2020-10-11 12:50:52,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293434523] [2020-10-11 12:50:52,312 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 [2020-10-11 12:50:52,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:50:52,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:52,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:52,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:52,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:52,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:52,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053172511] [2020-10-11 12:50:52,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:52,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:52,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:52,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:52,621 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-11 12:50:53,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:53,570 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-10-11 12:50:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:50:53,571 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:53,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:53,572 INFO L225 Difference]: With dead ends: 261 [2020-10-11 12:50:53,572 INFO L226 Difference]: Without dead ends: 259 [2020-10-11 12:50:53,572 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:50:53,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-11 12:50:53,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-10-11 12:50:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:50:53,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-10-11 12:50:53,576 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-10-11 12:50:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:53,576 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-10-11 12:50:53,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-10-11 12:50:53,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:53,576 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:53,576 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:53,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:53,777 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:53,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:53,778 INFO L82 PathProgramCache]: Analyzing trace with hash 95286048, now seen corresponding path program 179 times [2020-10-11 12:50:53,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:53,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261443358] [2020-10-11 12:50:53,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:53,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261443358] [2020-10-11 12:50:53,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29384545] [2020-10-11 12:50:53,894 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 [2020-10-11 12:50:53,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:50:53,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:53,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:53,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:54,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:54,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:54,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956112534] [2020-10-11 12:50:54,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:54,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:54,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:54,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:54,185 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-10-11 12:50:55,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:55,154 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-10-11 12:50:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:50:55,155 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:55,156 INFO L225 Difference]: With dead ends: 271 [2020-10-11 12:50:55,156 INFO L226 Difference]: Without dead ends: 269 [2020-10-11 12:50:55,156 INFO L673 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 [2020-10-11 12:50:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-11 12:50:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-10-11 12:50:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:50:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-10-11 12:50:55,160 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-10-11 12:50:55,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:55,160 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-10-11 12:50:55,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-10-11 12:50:55,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:55,160 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:55,161 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:55,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-11 12:50:55,370 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:55,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:55,371 INFO L82 PathProgramCache]: Analyzing trace with hash 95314878, now seen corresponding path program 180 times [2020-10-11 12:50:55,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:55,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521472136] [2020-10-11 12:50:55,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:55,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521472136] [2020-10-11 12:50:55,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209719014] [2020-10-11 12:50:55,512 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 [2020-10-11 12:50:55,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:50:55,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:55,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:55,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:55,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:55,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:55,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045870674] [2020-10-11 12:50:55,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:55,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:55,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:55,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:55,796 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-10-11 12:50:56,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:56,596 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-10-11 12:50:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:50:56,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:56,598 INFO L225 Difference]: With dead ends: 253 [2020-10-11 12:50:56,598 INFO L226 Difference]: Without dead ends: 251 [2020-10-11 12:50:56,598 INFO L673 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 [2020-10-11 12:50:56,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-11 12:50:56,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-10-11 12:50:56,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-11 12:50:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-11 12:50:56,601 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-11 12:50:56,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:56,601 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-11 12:50:56,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:56,601 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-11 12:50:56,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:56,602 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:56,602 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:56,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-11 12:50:56,803 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:56,803 INFO L82 PathProgramCache]: Analyzing trace with hash 115840877, now seen corresponding path program 181 times [2020-10-11 12:50:56,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:56,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24472042] [2020-10-11 12:50:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:56,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24472042] [2020-10-11 12:50:56,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012042939] [2020-10-11 12:50:56,955 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 [2020-10-11 12:50:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:56,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:56,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:57,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:57,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:57,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015746660] [2020-10-11 12:50:57,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:57,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:57,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:57,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:57,233 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-11 12:50:58,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:50:58,312 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-10-11 12:50:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:50:58,314 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:50:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:50:58,315 INFO L225 Difference]: With dead ends: 268 [2020-10-11 12:50:58,315 INFO L226 Difference]: Without dead ends: 266 [2020-10-11 12:50:58,316 INFO L673 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 [2020-10-11 12:50:58,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-11 12:50:58,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-10-11 12:50:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:50:58,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-11 12:50:58,319 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-11 12:50:58,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:50:58,319 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-11 12:50:58,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:50:58,319 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-11 12:50:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:50:58,320 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:50:58,320 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:50:58,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:50:58,521 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:50:58,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:50:58,521 INFO L82 PathProgramCache]: Analyzing trace with hash 115841838, now seen corresponding path program 182 times [2020-10-11 12:50:58,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:50:58,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636981083] [2020-10-11 12:50:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:50:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:50:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:58,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636981083] [2020-10-11 12:50:58,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326357469] [2020-10-11 12:50:58,697 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 [2020-10-11 12:50:58,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:50:58,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:50:58,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:50:58,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:50:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:50:59,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:50:59,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:50:59,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939596018] [2020-10-11 12:50:59,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:50:59,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:50:59,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:50:59,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:50:59,080 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-11 12:51:00,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:00,335 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-10-11 12:51:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 12:51:00,336 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:00,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:00,337 INFO L225 Difference]: With dead ends: 271 [2020-10-11 12:51:00,337 INFO L226 Difference]: Without dead ends: 269 [2020-10-11 12:51:00,338 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:51:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-11 12:51:00,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-11 12:51:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:51:00,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-11 12:51:00,341 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-11 12:51:00,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:00,341 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-11 12:51:00,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:00,341 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-11 12:51:00,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:00,342 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:00,342 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:00,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-11 12:51:00,543 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:00,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:00,543 INFO L82 PathProgramCache]: Analyzing trace with hash 116503967, now seen corresponding path program 183 times [2020-10-11 12:51:00,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:00,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547140296] [2020-10-11 12:51:00,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:00,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547140296] [2020-10-11 12:51:00,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689707940] [2020-10-11 12:51:00,697 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 [2020-10-11 12:51:00,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:51:00,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:00,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:00,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:00,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:00,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:00,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749493890] [2020-10-11 12:51:00,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:00,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:00,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:00,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:00,994 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-11 12:51:02,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:02,000 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-10-11 12:51:02,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:51:02,001 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:02,001 INFO L225 Difference]: With dead ends: 262 [2020-10-11 12:51:02,002 INFO L226 Difference]: Without dead ends: 260 [2020-10-11 12:51:02,002 INFO L673 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 [2020-10-11 12:51:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-11 12:51:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-10-11 12:51:02,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-11 12:51:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-11 12:51:02,005 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-11 12:51:02,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:02,006 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-11 12:51:02,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-11 12:51:02,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:02,006 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:02,006 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:02,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-10-11 12:51:02,207 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:02,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:02,208 INFO L82 PathProgramCache]: Analyzing trace with hash 116525326, now seen corresponding path program 184 times [2020-10-11 12:51:02,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:02,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495852755] [2020-10-11 12:51:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:02,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495852755] [2020-10-11 12:51:02,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283342601] [2020-10-11 12:51:02,342 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 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 [2020-10-11 12:51:02,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:51:02,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:02,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:02,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:02,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:51:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:02,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:02,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:02,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432532723] [2020-10-11 12:51:02,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:02,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:02,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:02,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:02,611 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-11 12:51:03,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:03,599 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-10-11 12:51:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:51:03,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:03,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:03,602 INFO L225 Difference]: With dead ends: 248 [2020-10-11 12:51:03,602 INFO L226 Difference]: Without dead ends: 243 [2020-10-11 12:51:03,602 INFO L673 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 [2020-10-11 12:51:03,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-11 12:51:03,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-10-11 12:51:03,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-11 12:51:03,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-11 12:51:03,605 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-11 12:51:03,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:03,605 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-11 12:51:03,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:03,605 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-11 12:51:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:03,606 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:03,606 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:03,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:03,807 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:03,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:03,807 INFO L82 PathProgramCache]: Analyzing trace with hash 116526287, now seen corresponding path program 185 times [2020-10-11 12:51:03,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:03,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506648819] [2020-10-11 12:51:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:03,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506648819] [2020-10-11 12:51:03,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409176290] [2020-10-11 12:51:03,949 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 [2020-10-11 12:51:03,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:51:03,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:03,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:03,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:04,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:51:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:04,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:04,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:04,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829354778] [2020-10-11 12:51:04,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:04,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:04,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:04,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:04,263 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-11 12:51:05,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:05,649 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-10-11 12:51:05,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 12:51:05,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:05,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:05,651 INFO L225 Difference]: With dead ends: 287 [2020-10-11 12:51:05,651 INFO L226 Difference]: Without dead ends: 282 [2020-10-11 12:51:05,651 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 12:51:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-11 12:51:05,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-10-11 12:51:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:51:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-11 12:51:05,655 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-11 12:51:05,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:05,655 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-11 12:51:05,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:05,655 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-11 12:51:05,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:05,655 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:05,655 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:05,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:05,856 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:05,857 INFO L82 PathProgramCache]: Analyzing trace with hash 116533758, now seen corresponding path program 186 times [2020-10-11 12:51:05,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:05,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664934438] [2020-10-11 12:51:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:06,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664934438] [2020-10-11 12:51:06,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442337429] [2020-10-11 12:51:06,035 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 [2020-10-11 12:51:06,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 12:51:06,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:06,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:06,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:06,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:06,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:06,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286188871] [2020-10-11 12:51:06,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:06,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:06,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:06,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:06,489 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-11 12:51:07,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:07,915 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-10-11 12:51:07,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:51:07,917 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:07,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:07,917 INFO L225 Difference]: With dead ends: 284 [2020-10-11 12:51:07,918 INFO L226 Difference]: Without dead ends: 282 [2020-10-11 12:51:07,918 INFO L673 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 [2020-10-11 12:51:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-11 12:51:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-10-11 12:51:07,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-11 12:51:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-11 12:51:07,922 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-11 12:51:07,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:07,922 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-11 12:51:07,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-11 12:51:07,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:07,923 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:07,923 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:08,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:08,124 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:08,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:08,124 INFO L82 PathProgramCache]: Analyzing trace with hash 116555117, now seen corresponding path program 187 times [2020-10-11 12:51:08,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:08,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088326420] [2020-10-11 12:51:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:08,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088326420] [2020-10-11 12:51:08,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783229376] [2020-10-11 12:51:08,272 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 [2020-10-11 12:51:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:08,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:08,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:08,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:51:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:08,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:08,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:08,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073178009] [2020-10-11 12:51:08,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:08,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:08,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:08,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:08,574 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-11 12:51:09,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:09,967 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-10-11 12:51:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 12:51:09,968 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:09,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:09,968 INFO L225 Difference]: With dead ends: 289 [2020-10-11 12:51:09,969 INFO L226 Difference]: Without dead ends: 284 [2020-10-11 12:51:09,969 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 12:51:09,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-11 12:51:09,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-10-11 12:51:09,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-11 12:51:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-10-11 12:51:09,972 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-10-11 12:51:09,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:09,972 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-10-11 12:51:09,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:09,972 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-10-11 12:51:09,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:09,973 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:09,973 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:10,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:10,174 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:10,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:10,174 INFO L82 PathProgramCache]: Analyzing trace with hash 116556078, now seen corresponding path program 188 times [2020-10-11 12:51:10,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:10,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755752680] [2020-10-11 12:51:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:10,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755752680] [2020-10-11 12:51:10,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936201317] [2020-10-11 12:51:10,312 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 [2020-10-11 12:51:10,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:51:10,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:10,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:10,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:10,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:51:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:10,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:10,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:10,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391989008] [2020-10-11 12:51:10,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:10,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:10,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:10,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:10,613 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-10-11 12:51:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:12,291 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-10-11 12:51:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:51:12,293 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:12,294 INFO L225 Difference]: With dead ends: 312 [2020-10-11 12:51:12,294 INFO L226 Difference]: Without dead ends: 304 [2020-10-11 12:51:12,294 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 12:51:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-11 12:51:12,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-10-11 12:51:12,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-11 12:51:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-11 12:51:12,298 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-11 12:51:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:12,298 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-11 12:51:12,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:12,298 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-11 12:51:12,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:12,298 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:12,298 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:12,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:12,499 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:12,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:12,500 INFO L82 PathProgramCache]: Analyzing trace with hash 116764398, now seen corresponding path program 189 times [2020-10-11 12:51:12,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:12,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610602579] [2020-10-11 12:51:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:12,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610602579] [2020-10-11 12:51:12,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946290442] [2020-10-11 12:51:12,622 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 [2020-10-11 12:51:12,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:51:12,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:12,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:12,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:12,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:12,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:12,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724064306] [2020-10-11 12:51:12,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:12,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:12,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:12,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:12,896 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-11 12:51:13,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:13,878 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-10-11 12:51:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:51:13,880 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:13,880 INFO L225 Difference]: With dead ends: 262 [2020-10-11 12:51:13,880 INFO L226 Difference]: Without dead ends: 260 [2020-10-11 12:51:13,881 INFO L673 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 [2020-10-11 12:51:13,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-11 12:51:13,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-10-11 12:51:13,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:51:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-11 12:51:13,884 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-11 12:51:13,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:13,884 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-11 12:51:13,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:13,884 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-11 12:51:13,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:13,885 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:13,885 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:14,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-11 12:51:14,093 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:14,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:14,094 INFO L82 PathProgramCache]: Analyzing trace with hash 117427488, now seen corresponding path program 190 times [2020-10-11 12:51:14,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:14,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227498177] [2020-10-11 12:51:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:14,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227498177] [2020-10-11 12:51:14,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071610190] [2020-10-11 12:51:14,229 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 [2020-10-11 12:51:14,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:51:14,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:14,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:14,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:14,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:14,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:14,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97093784] [2020-10-11 12:51:14,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:14,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:14,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:14,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:14,495 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-11 12:51:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:15,759 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-10-11 12:51:15,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:51:15,761 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:15,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:15,762 INFO L225 Difference]: With dead ends: 271 [2020-10-11 12:51:15,762 INFO L226 Difference]: Without dead ends: 269 [2020-10-11 12:51:15,762 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:51:15,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-11 12:51:15,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-11 12:51:15,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:51:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-11 12:51:15,765 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-11 12:51:15,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:15,765 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-11 12:51:15,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-11 12:51:15,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:15,766 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:15,766 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:15,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-11 12:51:15,967 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:15,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:15,967 INFO L82 PathProgramCache]: Analyzing trace with hash 117448847, now seen corresponding path program 191 times [2020-10-11 12:51:15,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:15,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486374056] [2020-10-11 12:51:15,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:16,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486374056] [2020-10-11 12:51:16,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078856442] [2020-10-11 12:51:16,161 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 [2020-10-11 12:51:16,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:51:16,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:16,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:16,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:16,456 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:51:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:16,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:16,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:16,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662957762] [2020-10-11 12:51:16,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:16,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:16,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:16,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:16,477 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-11 12:51:17,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:17,896 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-10-11 12:51:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:51:17,897 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:17,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:17,897 INFO L225 Difference]: With dead ends: 296 [2020-10-11 12:51:17,897 INFO L226 Difference]: Without dead ends: 288 [2020-10-11 12:51:17,898 INFO L673 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 [2020-10-11 12:51:17,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-11 12:51:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-10-11 12:51:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-11 12:51:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-11 12:51:17,902 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-11 12:51:17,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:17,902 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-11 12:51:17,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-11 12:51:17,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:17,902 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:17,902 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:18,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-10-11 12:51:18,103 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:18,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:18,104 INFO L82 PathProgramCache]: Analyzing trace with hash 117449808, now seen corresponding path program 192 times [2020-10-11 12:51:18,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:18,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789035912] [2020-10-11 12:51:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:18,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789035912] [2020-10-11 12:51:18,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027158878] [2020-10-11 12:51:18,254 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 [2020-10-11 12:51:18,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:51:18,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:18,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:18,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:18,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:51:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:18,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:18,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:18,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150213227] [2020-10-11 12:51:18,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:18,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:18,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:18,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:18,512 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-11 12:51:19,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:19,816 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-10-11 12:51:19,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 12:51:19,818 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:19,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:19,818 INFO L225 Difference]: With dead ends: 298 [2020-10-11 12:51:19,819 INFO L226 Difference]: Without dead ends: 290 [2020-10-11 12:51:19,819 INFO L673 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 [2020-10-11 12:51:19,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-11 12:51:19,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-10-11 12:51:19,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:51:19,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-10-11 12:51:19,823 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-10-11 12:51:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:19,823 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-10-11 12:51:19,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:19,823 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-10-11 12:51:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:19,824 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:19,824 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:20,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-11 12:51:20,024 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:20,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:20,025 INFO L82 PathProgramCache]: Analyzing trace with hash 117478638, now seen corresponding path program 193 times [2020-10-11 12:51:20,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:20,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461074683] [2020-10-11 12:51:20,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:20,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461074683] [2020-10-11 12:51:20,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501403689] [2020-10-11 12:51:20,171 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 [2020-10-11 12:51:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:20,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:20,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:20,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:51:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:20,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:20,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:20,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111850150] [2020-10-11 12:51:20,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:20,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:20,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:20,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:20,452 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-10-11 12:51:21,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:21,912 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-10-11 12:51:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 12:51:21,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:21,914 INFO L225 Difference]: With dead ends: 291 [2020-10-11 12:51:21,914 INFO L226 Difference]: Without dead ends: 283 [2020-10-11 12:51:21,915 INFO L673 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 [2020-10-11 12:51:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-11 12:51:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-10-11 12:51:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:51:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-11 12:51:21,918 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-11 12:51:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:21,918 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-11 12:51:21,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-11 12:51:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:21,919 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:21,919 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:22,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-10-11 12:51:22,120 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:22,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:22,120 INFO L82 PathProgramCache]: Analyzing trace with hash 144470028, now seen corresponding path program 194 times [2020-10-11 12:51:22,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:22,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044478470] [2020-10-11 12:51:22,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:22,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044478470] [2020-10-11 12:51:22,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097110538] [2020-10-11 12:51:22,262 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 [2020-10-11 12:51:22,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:51:22,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:22,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:22,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:22,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:22,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:22,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704292926] [2020-10-11 12:51:22,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:22,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:22,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:22,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:22,571 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-11 12:51:23,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:23,766 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-10-11 12:51:23,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:51:23,767 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:23,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:23,768 INFO L225 Difference]: With dead ends: 265 [2020-10-11 12:51:23,768 INFO L226 Difference]: Without dead ends: 263 [2020-10-11 12:51:23,768 INFO L673 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 [2020-10-11 12:51:23,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-11 12:51:23,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-10-11 12:51:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:51:23,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-11 12:51:23,772 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-11 12:51:23,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:23,772 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-11 12:51:23,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:23,773 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-11 12:51:23,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:23,773 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:23,773 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:23,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:23,974 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:23,974 INFO L82 PathProgramCache]: Analyzing trace with hash 145133118, now seen corresponding path program 195 times [2020-10-11 12:51:23,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:23,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160383509] [2020-10-11 12:51:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:24,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160383509] [2020-10-11 12:51:24,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779720711] [2020-10-11 12:51:24,119 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 [2020-10-11 12:51:24,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:51:24,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:24,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:24,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:24,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:24,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:24,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173494671] [2020-10-11 12:51:24,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:24,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:24,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:24,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:24,439 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-11 12:51:25,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:25,895 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-10-11 12:51:25,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:51:25,897 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:25,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:25,897 INFO L225 Difference]: With dead ends: 262 [2020-10-11 12:51:25,898 INFO L226 Difference]: Without dead ends: 260 [2020-10-11 12:51:25,898 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 12:51:25,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-11 12:51:25,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-10-11 12:51:25,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:51:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-11 12:51:25,902 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-11 12:51:25,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:25,902 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-11 12:51:25,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:25,902 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-11 12:51:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:25,902 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:25,902 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:26,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-10-11 12:51:26,103 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:26,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:26,104 INFO L82 PathProgramCache]: Analyzing trace with hash 145155438, now seen corresponding path program 196 times [2020-10-11 12:51:26,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:26,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953150787] [2020-10-11 12:51:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:26,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953150787] [2020-10-11 12:51:26,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352321302] [2020-10-11 12:51:26,252 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 [2020-10-11 12:51:26,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:51:26,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:26,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:26,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:26,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:51:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:26,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:26,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:51:26,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377887259] [2020-10-11 12:51:26,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:51:26,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:26,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:51:26,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:51:26,586 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-11 12:51:28,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:51:28,647 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-10-11 12:51:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:51:28,648 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:51:28,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:51:28,649 INFO L225 Difference]: With dead ends: 285 [2020-10-11 12:51:28,649 INFO L226 Difference]: Without dead ends: 280 [2020-10-11 12:51:28,649 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 12:51:28,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-11 12:51:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-10-11 12:51:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:51:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-11 12:51:28,653 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-11 12:51:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:51:28,653 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-11 12:51:28,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:51:28,653 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-11 12:51:28,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:51:28,654 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:51:28,654 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:51:28,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:51:28,855 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:51:28,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:51:28,855 INFO L82 PathProgramCache]: Analyzing trace with hash 145184268, now seen corresponding path program 197 times [2020-10-11 12:51:28,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:51:28,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115608231] [2020-10-11 12:51:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:51:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:51:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:29,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115608231] [2020-10-11 12:51:29,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125409110] [2020-10-11 12:51:29,007 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 [2020-10-11 12:51:29,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:51:29,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:51:29,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:51:29,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:51:33,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:51:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:51:35,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:51:35,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-11 12:51:35,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758073189] [2020-10-11 12:51:35,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 12:51:35,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:51:35,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 12:51:35,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-10-11 12:51:35,604 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-10-11 12:51:39,830 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-11 12:51:44,475 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-11 12:51:48,667 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2020-10-11 12:51:53,068 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-11 12:51:55,269 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-11 12:52:02,154 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-11 12:52:33,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:33,314 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-10-11 12:52:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:52:33,315 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-11 12:52:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:33,316 INFO L225 Difference]: With dead ends: 302 [2020-10-11 12:52:33,316 INFO L226 Difference]: Without dead ends: 297 [2020-10-11 12:52:33,316 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=565, Invalid=1408, Unknown=7, NotChecked=0, Total=1980 [2020-10-11 12:52:33,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-11 12:52:33,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-10-11 12:52:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:52:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-10-11 12:52:33,319 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-10-11 12:52:33,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:33,319 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-10-11 12:52:33,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 12:52:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-10-11 12:52:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:33,320 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:33,320 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:33,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:33,521 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:33,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:33,521 INFO L82 PathProgramCache]: Analyzing trace with hash 146086430, now seen corresponding path program 198 times [2020-10-11 12:52:33,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:33,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471491341] [2020-10-11 12:52:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:33,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471491341] [2020-10-11 12:52:33,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724400669] [2020-10-11 12:52:33,678 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 [2020-10-11 12:52:33,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:52:33,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:33,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:33,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:33,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:33,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:33,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303086909] [2020-10-11 12:52:33,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:33,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:33,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:33,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:33,964 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-10-11 12:52:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:34,477 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-10-11 12:52:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:52:34,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:34,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:34,479 INFO L225 Difference]: With dead ends: 219 [2020-10-11 12:52:34,479 INFO L226 Difference]: Without dead ends: 217 [2020-10-11 12:52:34,479 INFO L673 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 [2020-10-11 12:52:34,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-11 12:52:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-10-11 12:52:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:52:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-11 12:52:34,482 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-11 12:52:34,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:34,482 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-11 12:52:34,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:34,482 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-11 12:52:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:34,482 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:34,483 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:34,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:34,683 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:34,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:34,684 INFO L82 PathProgramCache]: Analyzing trace with hash 146108750, now seen corresponding path program 199 times [2020-10-11 12:52:34,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:34,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490771327] [2020-10-11 12:52:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:34,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490771327] [2020-10-11 12:52:34,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440178031] [2020-10-11 12:52:34,842 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 [2020-10-11 12:52:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:34,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:34,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:35,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:52:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:35,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:35,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:35,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256344828] [2020-10-11 12:52:35,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:35,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:35,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:35,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:35,118 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-11 12:52:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:35,799 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-10-11 12:52:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:52:35,800 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:35,801 INFO L225 Difference]: With dead ends: 229 [2020-10-11 12:52:35,801 INFO L226 Difference]: Without dead ends: 224 [2020-10-11 12:52:35,801 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:52:35,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-11 12:52:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-10-11 12:52:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-11 12:52:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-10-11 12:52:35,806 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-10-11 12:52:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:35,807 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-10-11 12:52:35,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-10-11 12:52:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:35,807 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:35,807 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:36,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-11 12:52:36,015 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:36,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:36,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2034084541, now seen corresponding path program 200 times [2020-10-11 12:52:36,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:36,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252817771] [2020-10-11 12:52:36,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:36,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252817771] [2020-10-11 12:52:36,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474120505] [2020-10-11 12:52:36,170 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 [2020-10-11 12:52:36,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:52:36,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:36,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:36,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:36,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:36,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:36,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054005230] [2020-10-11 12:52:36,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:36,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:36,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:36,440 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-10-11 12:52:36,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:36,881 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-11 12:52:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:52:36,882 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:36,882 INFO L225 Difference]: With dead ends: 229 [2020-10-11 12:52:36,883 INFO L226 Difference]: Without dead ends: 227 [2020-10-11 12:52:36,883 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:52:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-11 12:52:36,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-11 12:52:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-11 12:52:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-11 12:52:36,886 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-11 12:52:36,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:36,886 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-11 12:52:36,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-11 12:52:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:36,886 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:36,887 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:37,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-11 12:52:37,087 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:37,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:37,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2034085502, now seen corresponding path program 201 times [2020-10-11 12:52:37,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:37,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76942353] [2020-10-11 12:52:37,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:37,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76942353] [2020-10-11 12:52:37,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189467363] [2020-10-11 12:52:37,247 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 [2020-10-11 12:52:37,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:52:37,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:37,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:37,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:37,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:37,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:37,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136928511] [2020-10-11 12:52:37,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:37,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:37,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:37,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:37,606 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-11 12:52:38,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:38,228 INFO L93 Difference]: Finished difference Result 237 states and 545 transitions. [2020-10-11 12:52:38,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:52:38,230 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:38,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:38,231 INFO L225 Difference]: With dead ends: 237 [2020-10-11 12:52:38,231 INFO L226 Difference]: Without dead ends: 235 [2020-10-11 12:52:38,231 INFO L673 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 [2020-10-11 12:52:38,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-11 12:52:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2020-10-11 12:52:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-11 12:52:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-10-11 12:52:38,234 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-10-11 12:52:38,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:38,234 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-10-11 12:52:38,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:38,235 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-10-11 12:52:38,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:38,235 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:38,235 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:38,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-11 12:52:38,439 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:38,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:38,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2034114332, now seen corresponding path program 202 times [2020-10-11 12:52:38,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:38,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540306988] [2020-10-11 12:52:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:38,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540306988] [2020-10-11 12:52:38,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050722159] [2020-10-11 12:52:38,606 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 [2020-10-11 12:52:38,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:52:38,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:38,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:38,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:39,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:39,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:39,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488988635] [2020-10-11 12:52:39,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:39,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:39,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:39,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:39,065 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-10-11 12:52:40,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:40,022 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-11 12:52:40,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:52:40,024 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:40,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:40,025 INFO L225 Difference]: With dead ends: 246 [2020-10-11 12:52:40,025 INFO L226 Difference]: Without dead ends: 244 [2020-10-11 12:52:40,025 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:52:40,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-11 12:52:40,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2020-10-11 12:52:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:52:40,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-10-11 12:52:40,029 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-10-11 12:52:40,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:40,029 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-10-11 12:52:40,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:40,029 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-10-11 12:52:40,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:40,029 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:40,030 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:40,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-11 12:52:40,230 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:40,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:40,231 INFO L82 PathProgramCache]: Analyzing trace with hash 2035009023, now seen corresponding path program 203 times [2020-10-11 12:52:40,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:40,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89569728] [2020-10-11 12:52:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:40,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89569728] [2020-10-11 12:52:40,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131010484] [2020-10-11 12:52:40,413 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 [2020-10-11 12:52:40,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:52:40,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:40,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:40,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:40,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:40,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:40,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468066335] [2020-10-11 12:52:40,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:40,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:40,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:40,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:40,764 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-10-11 12:52:41,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:41,415 INFO L93 Difference]: Finished difference Result 245 states and 560 transitions. [2020-10-11 12:52:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:52:41,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:41,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:41,419 INFO L225 Difference]: With dead ends: 245 [2020-10-11 12:52:41,419 INFO L226 Difference]: Without dead ends: 243 [2020-10-11 12:52:41,419 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:52:41,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-11 12:52:41,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2020-10-11 12:52:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:52:41,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-10-11 12:52:41,423 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-10-11 12:52:41,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:41,423 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-10-11 12:52:41,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:41,423 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-10-11 12:52:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:41,423 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:41,423 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:41,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-11 12:52:41,624 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:41,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:41,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2062713692, now seen corresponding path program 204 times [2020-10-11 12:52:41,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:41,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224769768] [2020-10-11 12:52:41,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:41,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224769768] [2020-10-11 12:52:41,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86477070] [2020-10-11 12:52:41,828 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 [2020-10-11 12:52:41,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:52:41,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:41,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:41,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:42,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:42,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:42,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255705978] [2020-10-11 12:52:42,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:42,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:42,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:42,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:42,165 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-10-11 12:52:42,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:42,717 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2020-10-11 12:52:42,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:52:42,719 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:42,719 INFO L225 Difference]: With dead ends: 239 [2020-10-11 12:52:42,719 INFO L226 Difference]: Without dead ends: 237 [2020-10-11 12:52:42,719 INFO L673 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 [2020-10-11 12:52:42,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-11 12:52:42,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2020-10-11 12:52:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:52:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-10-11 12:52:42,722 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-10-11 12:52:42,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:42,722 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-10-11 12:52:42,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-10-11 12:52:42,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:42,723 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:42,723 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:42,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-10-11 12:52:42,923 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:42,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2063667004, now seen corresponding path program 205 times [2020-10-11 12:52:42,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:42,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123748135] [2020-10-11 12:52:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:43,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123748135] [2020-10-11 12:52:43,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159000817] [2020-10-11 12:52:43,139 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 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 [2020-10-11 12:52:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:43,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:43,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:43,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:43,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:43,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610133249] [2020-10-11 12:52:43,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:43,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:43,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:43,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:43,455 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-10-11 12:52:43,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:43,925 INFO L93 Difference]: Finished difference Result 220 states and 508 transitions. [2020-10-11 12:52:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:52:43,928 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:43,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:43,928 INFO L225 Difference]: With dead ends: 220 [2020-10-11 12:52:43,928 INFO L226 Difference]: Without dead ends: 218 [2020-10-11 12:52:43,929 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-11 12:52:43,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-11 12:52:43,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2020-10-11 12:52:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-11 12:52:43,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-10-11 12:52:43,932 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-10-11 12:52:43,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:43,932 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-10-11 12:52:43,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:43,932 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-10-11 12:52:43,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:43,932 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:43,933 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:44,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-11 12:52:44,134 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:44,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:44,135 INFO L82 PathProgramCache]: Analyzing trace with hash 313362251, now seen corresponding path program 206 times [2020-10-11 12:52:44,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:44,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899668965] [2020-10-11 12:52:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:44,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899668965] [2020-10-11 12:52:44,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143645909] [2020-10-11 12:52:44,304 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 [2020-10-11 12:52:44,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:52:44,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:44,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:44,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:44,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:44,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:44,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384394694] [2020-10-11 12:52:44,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:44,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:44,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:44,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:44,651 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-10-11 12:52:45,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:45,186 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-11 12:52:45,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:52:45,188 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:45,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:45,188 INFO L225 Difference]: With dead ends: 229 [2020-10-11 12:52:45,188 INFO L226 Difference]: Without dead ends: 227 [2020-10-11 12:52:45,188 INFO L673 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 [2020-10-11 12:52:45,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-11 12:52:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-11 12:52:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-11 12:52:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-10-11 12:52:45,192 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-10-11 12:52:45,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:45,192 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-10-11 12:52:45,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:45,192 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-10-11 12:52:45,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:45,193 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:45,193 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:45,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-10-11 12:52:45,396 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:45,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:45,396 INFO L82 PathProgramCache]: Analyzing trace with hash 313363212, now seen corresponding path program 207 times [2020-10-11 12:52:45,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:45,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757793833] [2020-10-11 12:52:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:45,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757793833] [2020-10-11 12:52:45,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043455669] [2020-10-11 12:52:45,573 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 [2020-10-11 12:52:45,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:52:45,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:45,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:45,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:45,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:45,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:45,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923651209] [2020-10-11 12:52:45,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:45,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:45,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:45,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:45,975 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-10-11 12:52:46,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:46,607 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2020-10-11 12:52:46,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:52:46,608 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:46,609 INFO L225 Difference]: With dead ends: 233 [2020-10-11 12:52:46,609 INFO L226 Difference]: Without dead ends: 231 [2020-10-11 12:52:46,610 INFO L673 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 [2020-10-11 12:52:46,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-11 12:52:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-10-11 12:52:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-11 12:52:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-10-11 12:52:46,613 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-10-11 12:52:46,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:46,613 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-10-11 12:52:46,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:46,613 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-10-11 12:52:46,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:46,613 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:46,614 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:46,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:46,814 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:46,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:46,815 INFO L82 PathProgramCache]: Analyzing trace with hash 313392042, now seen corresponding path program 208 times [2020-10-11 12:52:46,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:46,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008506997] [2020-10-11 12:52:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:46,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008506997] [2020-10-11 12:52:46,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761232019] [2020-10-11 12:52:46,969 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 [2020-10-11 12:52:47,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:52:47,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:47,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:47,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:48,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:48,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:48,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367374334] [2020-10-11 12:52:48,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:48,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:48,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:48,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:48,965 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-10-11 12:52:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:49,929 INFO L93 Difference]: Finished difference Result 256 states and 582 transitions. [2020-10-11 12:52:49,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:52:49,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:49,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:49,932 INFO L225 Difference]: With dead ends: 256 [2020-10-11 12:52:49,932 INFO L226 Difference]: Without dead ends: 254 [2020-10-11 12:52:49,932 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:52:49,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-11 12:52:49,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2020-10-11 12:52:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-11 12:52:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-10-11 12:52:49,936 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-10-11 12:52:49,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:49,936 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-10-11 12:52:49,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:49,936 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-10-11 12:52:49,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:49,936 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:49,936 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:50,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:50,137 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:50,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:50,138 INFO L82 PathProgramCache]: Analyzing trace with hash 314286733, now seen corresponding path program 209 times [2020-10-11 12:52:50,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:50,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734972286] [2020-10-11 12:52:50,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:50,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734972286] [2020-10-11 12:52:50,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408123753] [2020-10-11 12:52:50,293 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 [2020-10-11 12:52:50,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:52:50,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:50,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:50,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:50,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:50,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:50,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399918006] [2020-10-11 12:52:50,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:50,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:50,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:50,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:50,631 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-10-11 12:52:51,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:51,313 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-11 12:52:51,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:52:51,315 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:51,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:51,315 INFO L225 Difference]: With dead ends: 246 [2020-10-11 12:52:51,315 INFO L226 Difference]: Without dead ends: 244 [2020-10-11 12:52:51,316 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:52:51,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-11 12:52:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-10-11 12:52:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-11 12:52:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-10-11 12:52:51,319 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-10-11 12:52:51,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:51,319 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-10-11 12:52:51,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:51,319 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-10-11 12:52:51,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:51,320 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:51,320 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:51,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:51,526 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:51,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:51,526 INFO L82 PathProgramCache]: Analyzing trace with hash 950591741, now seen corresponding path program 210 times [2020-10-11 12:52:51,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:51,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714883640] [2020-10-11 12:52:51,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:51,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714883640] [2020-10-11 12:52:51,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283102949] [2020-10-11 12:52:51,702 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 [2020-10-11 12:52:51,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 12:52:51,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:51,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:51,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:52,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:52,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:52,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955949732] [2020-10-11 12:52:52,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:52,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:52,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:52,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:52,065 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-10-11 12:52:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:52,836 INFO L93 Difference]: Finished difference Result 250 states and 575 transitions. [2020-10-11 12:52:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:52:52,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:52,838 INFO L225 Difference]: With dead ends: 250 [2020-10-11 12:52:52,838 INFO L226 Difference]: Without dead ends: 248 [2020-10-11 12:52:52,838 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:52:52,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-11 12:52:52,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2020-10-11 12:52:52,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:52:52,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-11 12:52:52,842 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-11 12:52:52,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:52,842 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-11 12:52:52,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-11 12:52:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:52,842 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:52,843 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:53,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-11 12:52:53,043 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:53,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:53,044 INFO L82 PathProgramCache]: Analyzing trace with hash 950592702, now seen corresponding path program 211 times [2020-10-11 12:52:53,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:53,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300718477] [2020-10-11 12:52:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:53,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300718477] [2020-10-11 12:52:53,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276436062] [2020-10-11 12:52:53,204 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 [2020-10-11 12:52:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:53,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:53,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:53,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:53,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:53,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987723314] [2020-10-11 12:52:53,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:53,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:53,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:53,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:53,547 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-11 12:52:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:54,310 INFO L93 Difference]: Finished difference Result 245 states and 564 transitions. [2020-10-11 12:52:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 12:52:54,312 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:54,312 INFO L225 Difference]: With dead ends: 245 [2020-10-11 12:52:54,313 INFO L226 Difference]: Without dead ends: 243 [2020-10-11 12:52:54,313 INFO L673 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 [2020-10-11 12:52:54,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-11 12:52:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2020-10-11 12:52:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:52:54,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-11 12:52:54,316 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-11 12:52:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:54,317 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-11 12:52:54,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:54,317 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-11 12:52:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:54,317 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:54,317 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:54,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:52:54,518 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:54,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:54,519 INFO L82 PathProgramCache]: Analyzing trace with hash 950621532, now seen corresponding path program 212 times [2020-10-11 12:52:54,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:54,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370348623] [2020-10-11 12:52:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:54,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370348623] [2020-10-11 12:52:54,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916774621] [2020-10-11 12:52:54,681 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 [2020-10-11 12:52:54,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:52:54,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:54,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:54,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:55,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:55,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:55,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449353755] [2020-10-11 12:52:55,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:55,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:55,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:55,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:55,160 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-11 12:52:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:56,340 INFO L93 Difference]: Finished difference Result 262 states and 602 transitions. [2020-10-11 12:52:56,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:52:56,342 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:56,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:56,343 INFO L225 Difference]: With dead ends: 262 [2020-10-11 12:52:56,343 INFO L226 Difference]: Without dead ends: 260 [2020-10-11 12:52:56,343 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:52:56,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-11 12:52:56,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 165. [2020-10-11 12:52:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-11 12:52:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-11 12:52:56,346 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-11 12:52:56,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:56,346 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-11 12:52:56,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:56,346 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-11 12:52:56,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:56,347 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:56,347 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:56,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-11 12:52:56,548 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:56,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:56,548 INFO L82 PathProgramCache]: Analyzing trace with hash 971147531, now seen corresponding path program 213 times [2020-10-11 12:52:56,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:56,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225451342] [2020-10-11 12:52:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:56,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225451342] [2020-10-11 12:52:56,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164477684] [2020-10-11 12:52:56,714 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 [2020-10-11 12:52:56,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:52:56,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:56,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:56,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:57,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:57,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:57,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998283677] [2020-10-11 12:52:57,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:57,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:57,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:57,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:57,114 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-11 12:52:58,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:58,030 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2020-10-11 12:52:58,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:52:58,032 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:58,033 INFO L225 Difference]: With dead ends: 254 [2020-10-11 12:52:58,033 INFO L226 Difference]: Without dead ends: 252 [2020-10-11 12:52:58,034 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:52:58,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-11 12:52:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2020-10-11 12:52:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:52:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-10-11 12:52:58,037 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-10-11 12:52:58,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:58,037 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-10-11 12:52:58,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:58,037 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-10-11 12:52:58,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:58,038 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:58,038 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:52:58,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-11 12:52:58,238 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:52:58,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:52:58,239 INFO L82 PathProgramCache]: Analyzing trace with hash 971148492, now seen corresponding path program 214 times [2020-10-11 12:52:58,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:52:58,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004414085] [2020-10-11 12:52:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:52:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:52:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:58,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004414085] [2020-10-11 12:52:58,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849242382] [2020-10-11 12:52:58,456 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 [2020-10-11 12:52:58,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:52:58,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:52:58,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:52:58,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:52:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:52:58,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:52:58,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:52:58,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940438280] [2020-10-11 12:52:58,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:52:58,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:52:58,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:52:58,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:52:58,886 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-10-11 12:52:59,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:52:59,794 INFO L93 Difference]: Finished difference Result 248 states and 576 transitions. [2020-10-11 12:52:59,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:52:59,797 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:52:59,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:52:59,797 INFO L225 Difference]: With dead ends: 248 [2020-10-11 12:52:59,797 INFO L226 Difference]: Without dead ends: 246 [2020-10-11 12:52:59,798 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:52:59,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-11 12:52:59,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 167. [2020-10-11 12:52:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:52:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-11 12:52:59,801 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-11 12:52:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:52:59,801 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-11 12:52:59,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:52:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-11 12:52:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:52:59,802 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:52:59,802 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:00,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:00,003 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:00,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:00,003 INFO L82 PathProgramCache]: Analyzing trace with hash 971810621, now seen corresponding path program 215 times [2020-10-11 12:53:00,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:00,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792412434] [2020-10-11 12:53:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:00,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792412434] [2020-10-11 12:53:00,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402424738] [2020-10-11 12:53:00,190 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 [2020-10-11 12:53:00,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 12:53:00,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:00,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:00,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:00,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:00,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:00,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343602429] [2020-10-11 12:53:00,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:00,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:00,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:00,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:00,533 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-11 12:53:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:01,549 INFO L93 Difference]: Finished difference Result 245 states and 579 transitions. [2020-10-11 12:53:01,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 12:53:01,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:01,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:01,551 INFO L225 Difference]: With dead ends: 245 [2020-10-11 12:53:01,551 INFO L226 Difference]: Without dead ends: 243 [2020-10-11 12:53:01,552 INFO L673 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 [2020-10-11 12:53:01,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-11 12:53:01,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2020-10-11 12:53:01,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:53:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-11 12:53:01,556 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-11 12:53:01,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:01,556 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-11 12:53:01,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:01,556 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-11 12:53:01,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:01,557 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:01,557 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:01,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:01,765 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:01,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:01,766 INFO L82 PathProgramCache]: Analyzing trace with hash 971831980, now seen corresponding path program 216 times [2020-10-11 12:53:01,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:01,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187979585] [2020-10-11 12:53:01,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:01,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187979585] [2020-10-11 12:53:01,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834871187] [2020-10-11 12:53:01,953 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 [2020-10-11 12:53:01,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:53:01,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:01,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:01,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:02,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:53:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:02,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:02,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:02,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562884326] [2020-10-11 12:53:02,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:02,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:02,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:02,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:02,262 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-11 12:53:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:02,924 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-10-11 12:53:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:53:02,927 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:02,927 INFO L225 Difference]: With dead ends: 223 [2020-10-11 12:53:02,927 INFO L226 Difference]: Without dead ends: 218 [2020-10-11 12:53:02,928 INFO L673 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 [2020-10-11 12:53:02,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-11 12:53:02,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-10-11 12:53:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:53:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-11 12:53:02,930 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-11 12:53:02,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:02,930 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-11 12:53:02,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-11 12:53:02,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:02,931 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:02,931 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:03,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-10-11 12:53:03,132 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:03,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:03,132 INFO L82 PathProgramCache]: Analyzing trace with hash 971832941, now seen corresponding path program 217 times [2020-10-11 12:53:03,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:03,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791313534] [2020-10-11 12:53:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:03,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791313534] [2020-10-11 12:53:03,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549983658] [2020-10-11 12:53:03,303 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 [2020-10-11 12:53:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:03,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:03,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:03,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:53:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:03,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:03,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:03,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011437841] [2020-10-11 12:53:03,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:03,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:03,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:03,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:03,667 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-11 12:53:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:05,400 INFO L93 Difference]: Finished difference Result 286 states and 679 transitions. [2020-10-11 12:53:05,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:53:05,402 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:05,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:05,402 INFO L225 Difference]: With dead ends: 286 [2020-10-11 12:53:05,403 INFO L226 Difference]: Without dead ends: 281 [2020-10-11 12:53:05,403 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:53:05,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-11 12:53:05,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2020-10-11 12:53:05,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-11 12:53:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-11 12:53:05,406 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-11 12:53:05,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:05,406 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-11 12:53:05,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:05,407 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-11 12:53:05,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:05,407 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:05,407 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:05,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:05,608 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:05,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:05,609 INFO L82 PathProgramCache]: Analyzing trace with hash 971840412, now seen corresponding path program 218 times [2020-10-11 12:53:05,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:05,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914532999] [2020-10-11 12:53:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:05,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914532999] [2020-10-11 12:53:05,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311804019] [2020-10-11 12:53:05,786 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 [2020-10-11 12:53:05,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:53:05,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:05,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:05,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:06,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:06,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:06,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022586689] [2020-10-11 12:53:06,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:06,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:06,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:06,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:06,201 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-11 12:53:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:07,432 INFO L93 Difference]: Finished difference Result 268 states and 630 transitions. [2020-10-11 12:53:07,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 12:53:07,434 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:07,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:07,435 INFO L225 Difference]: With dead ends: 268 [2020-10-11 12:53:07,435 INFO L226 Difference]: Without dead ends: 266 [2020-10-11 12:53:07,435 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 12:53:07,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-11 12:53:07,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 169. [2020-10-11 12:53:07,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:53:07,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-11 12:53:07,439 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-11 12:53:07,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:07,439 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-11 12:53:07,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:07,439 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-11 12:53:07,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:07,440 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:07,440 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:07,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-10-11 12:53:07,641 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:07,642 INFO L82 PathProgramCache]: Analyzing trace with hash 971861771, now seen corresponding path program 219 times [2020-10-11 12:53:07,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:07,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544276190] [2020-10-11 12:53:07,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:07,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544276190] [2020-10-11 12:53:07,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662461417] [2020-10-11 12:53:07,834 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 [2020-10-11 12:53:07,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:53:07,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:07,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:07,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:08,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:53:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:08,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:08,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:08,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194734717] [2020-10-11 12:53:08,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:08,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:08,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:08,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:08,207 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-11 12:53:09,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:09,609 INFO L93 Difference]: Finished difference Result 296 states and 707 transitions. [2020-10-11 12:53:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:53:09,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:09,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:09,611 INFO L225 Difference]: With dead ends: 296 [2020-10-11 12:53:09,611 INFO L226 Difference]: Without dead ends: 291 [2020-10-11 12:53:09,612 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 12:53:09,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-11 12:53:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2020-10-11 12:53:09,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:53:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-11 12:53:09,615 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-11 12:53:09,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:09,615 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-11 12:53:09,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:09,615 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-11 12:53:09,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:09,616 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:09,616 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:09,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:09,819 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:09,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:09,820 INFO L82 PathProgramCache]: Analyzing trace with hash 971862732, now seen corresponding path program 220 times [2020-10-11 12:53:09,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:09,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074075921] [2020-10-11 12:53:09,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:09,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074075921] [2020-10-11 12:53:09,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820890827] [2020-10-11 12:53:09,986 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 [2020-10-11 12:53:10,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:53:10,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:10,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:10,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:10,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:53:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:10,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:10,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:10,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989297700] [2020-10-11 12:53:10,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:10,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:10,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:10,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:10,384 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-11 12:53:11,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:11,915 INFO L93 Difference]: Finished difference Result 299 states and 710 transitions. [2020-10-11 12:53:11,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:53:11,918 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:11,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:11,919 INFO L225 Difference]: With dead ends: 299 [2020-10-11 12:53:11,919 INFO L226 Difference]: Without dead ends: 294 [2020-10-11 12:53:11,919 INFO L673 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 [2020-10-11 12:53:11,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-11 12:53:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 165. [2020-10-11 12:53:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-11 12:53:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-11 12:53:11,922 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-11 12:53:11,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:11,923 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-11 12:53:11,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:11,923 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-11 12:53:11,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:11,923 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:11,923 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:12,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:12,124 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:12,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:12,124 INFO L82 PathProgramCache]: Analyzing trace with hash 972071052, now seen corresponding path program 221 times [2020-10-11 12:53:12,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:12,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517940162] [2020-10-11 12:53:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:12,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517940162] [2020-10-11 12:53:12,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476626123] [2020-10-11 12:53:12,305 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 [2020-10-11 12:53:12,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:53:12,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:12,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:12,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:14,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:14,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:14,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545339276] [2020-10-11 12:53:14,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:14,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:14,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:14,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:14,111 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-11 12:53:15,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:15,559 INFO L93 Difference]: Finished difference Result 274 states and 633 transitions. [2020-10-11 12:53:15,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:53:15,561 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:15,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:15,561 INFO L225 Difference]: With dead ends: 274 [2020-10-11 12:53:15,561 INFO L226 Difference]: Without dead ends: 272 [2020-10-11 12:53:15,562 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 12:53:15,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-11 12:53:15,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-10-11 12:53:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-11 12:53:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-11 12:53:15,566 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-11 12:53:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:15,567 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-11 12:53:15,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-11 12:53:15,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:15,567 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:15,568 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:15,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:53:15,779 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:15,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:15,779 INFO L82 PathProgramCache]: Analyzing trace with hash 972734142, now seen corresponding path program 222 times [2020-10-11 12:53:15,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:15,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258099239] [2020-10-11 12:53:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:15,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258099239] [2020-10-11 12:53:15,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595498863] [2020-10-11 12:53:15,941 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 [2020-10-11 12:53:15,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:53:15,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:15,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:15,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:16,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:16,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:16,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530337706] [2020-10-11 12:53:16,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:16,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:16,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:16,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:16,472 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-11 12:53:18,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:18,337 INFO L93 Difference]: Finished difference Result 282 states and 670 transitions. [2020-10-11 12:53:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 12:53:18,341 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:18,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:18,342 INFO L225 Difference]: With dead ends: 282 [2020-10-11 12:53:18,342 INFO L226 Difference]: Without dead ends: 280 [2020-10-11 12:53:18,342 INFO L673 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 [2020-10-11 12:53:18,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-11 12:53:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 174. [2020-10-11 12:53:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-11 12:53:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-10-11 12:53:18,346 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-10-11 12:53:18,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:18,347 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-10-11 12:53:18,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:18,347 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-10-11 12:53:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:18,347 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:18,347 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:18,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-11 12:53:18,552 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:18,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:18,552 INFO L82 PathProgramCache]: Analyzing trace with hash 972755501, now seen corresponding path program 223 times [2020-10-11 12:53:18,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:18,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043034645] [2020-10-11 12:53:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:18,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043034645] [2020-10-11 12:53:18,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408537041] [2020-10-11 12:53:18,741 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 [2020-10-11 12:53:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:18,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:18,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:19,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:53:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:19,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:19,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:19,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079681278] [2020-10-11 12:53:19,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:19,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:19,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:19,126 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-10-11 12:53:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:21,256 INFO L93 Difference]: Finished difference Result 321 states and 773 transitions. [2020-10-11 12:53:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:53:21,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:21,258 INFO L225 Difference]: With dead ends: 321 [2020-10-11 12:53:21,259 INFO L226 Difference]: Without dead ends: 313 [2020-10-11 12:53:21,259 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 12:53:21,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-11 12:53:21,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 176. [2020-10-11 12:53:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-11 12:53:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-10-11 12:53:21,263 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-10-11 12:53:21,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:21,263 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-10-11 12:53:21,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:21,263 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-10-11 12:53:21,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:21,264 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:21,264 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:21,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-11 12:53:21,465 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:21,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:21,465 INFO L82 PathProgramCache]: Analyzing trace with hash 972756462, now seen corresponding path program 224 times [2020-10-11 12:53:21,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:21,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125099876] [2020-10-11 12:53:21,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:21,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125099876] [2020-10-11 12:53:21,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001665634] [2020-10-11 12:53:21,630 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 [2020-10-11 12:53:21,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:53:21,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:21,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:21,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:28,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:53:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:28,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:28,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:28,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896958600] [2020-10-11 12:53:28,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:28,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:28,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:28,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-10-11 12:53:28,187 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-10-11 12:53:32,947 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-11 12:53:37,131 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-11 12:53:41,450 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-11 12:53:45,830 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-11 12:53:47,949 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-11 12:53:52,659 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-11 12:53:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:54,076 INFO L93 Difference]: Finished difference Result 323 states and 782 transitions. [2020-10-11 12:53:54,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 12:53:54,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:54,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:54,079 INFO L225 Difference]: With dead ends: 323 [2020-10-11 12:53:54,079 INFO L226 Difference]: Without dead ends: 315 [2020-10-11 12:53:54,080 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=530, Invalid=1274, Unknown=2, NotChecked=0, Total=1806 [2020-10-11 12:53:54,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-11 12:53:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 171. [2020-10-11 12:53:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-11 12:53:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-11 12:53:54,083 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-11 12:53:54,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:54,083 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-11 12:53:54,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-11 12:53:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:54,083 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:54,084 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:54,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-10-11 12:53:54,287 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:54,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:54,288 INFO L82 PathProgramCache]: Analyzing trace with hash 972785292, now seen corresponding path program 225 times [2020-10-11 12:53:54,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:54,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452854291] [2020-10-11 12:53:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:54,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452854291] [2020-10-11 12:53:54,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650918992] [2020-10-11 12:53:54,480 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 [2020-10-11 12:53:54,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:53:54,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:54,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:54,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:54,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:53:54,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:53:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:54,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:54,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:54,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884935030] [2020-10-11 12:53:54,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:54,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:54,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:54,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:54,901 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-11 12:53:57,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:57,385 INFO L93 Difference]: Finished difference Result 320 states and 767 transitions. [2020-10-11 12:53:57,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:53:57,387 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:57,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:57,387 INFO L225 Difference]: With dead ends: 320 [2020-10-11 12:53:57,388 INFO L226 Difference]: Without dead ends: 312 [2020-10-11 12:53:57,388 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 12:53:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-11 12:53:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 170. [2020-10-11 12:53:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-11 12:53:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 431 transitions. [2020-10-11 12:53:57,391 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 431 transitions. Word has length 14 [2020-10-11 12:53:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:57,392 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 431 transitions. [2020-10-11 12:53:57,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 431 transitions. [2020-10-11 12:53:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:57,392 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:57,392 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:57,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-11 12:53:57,593 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:57,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:57,594 INFO L82 PathProgramCache]: Analyzing trace with hash 979221853, now seen corresponding path program 226 times [2020-10-11 12:53:57,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:57,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385227675] [2020-10-11 12:53:57,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:57,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385227675] [2020-10-11 12:53:57,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589654084] [2020-10-11 12:53:57,785 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 [2020-10-11 12:53:57,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:53:57,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:57,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:57,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:58,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:58,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:58,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721269729] [2020-10-11 12:53:58,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:58,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:58,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:58,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:58,183 INFO L87 Difference]: Start difference. First operand 170 states and 431 transitions. Second operand 17 states. [2020-10-11 12:53:59,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:53:59,114 INFO L93 Difference]: Finished difference Result 256 states and 599 transitions. [2020-10-11 12:53:59,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 12:53:59,117 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:53:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:53:59,117 INFO L225 Difference]: With dead ends: 256 [2020-10-11 12:53:59,117 INFO L226 Difference]: Without dead ends: 254 [2020-10-11 12:53:59,117 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:53:59,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-11 12:53:59,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 168. [2020-10-11 12:53:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-11 12:53:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 425 transitions. [2020-10-11 12:53:59,121 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 425 transitions. Word has length 14 [2020-10-11 12:53:59,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:53:59,121 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 425 transitions. [2020-10-11 12:53:59,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:53:59,121 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 425 transitions. [2020-10-11 12:53:59,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:53:59,122 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:53:59,122 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:53:59,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2020-10-11 12:53:59,323 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:53:59,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:53:59,323 INFO L82 PathProgramCache]: Analyzing trace with hash 999776682, now seen corresponding path program 227 times [2020-10-11 12:53:59,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:53:59,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581843720] [2020-10-11 12:53:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:53:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:53:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:59,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581843720] [2020-10-11 12:53:59,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515731211] [2020-10-11 12:53:59,512 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 [2020-10-11 12:53:59,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:53:59,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:53:59,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:53:59,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:53:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:53:59,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:53:59,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:53:59,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757513541] [2020-10-11 12:53:59,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:53:59,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:53:59,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:53:59,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:53:59,888 INFO L87 Difference]: Start difference. First operand 168 states and 425 transitions. Second operand 17 states. [2020-10-11 12:54:01,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:01,525 INFO L93 Difference]: Finished difference Result 294 states and 688 transitions. [2020-10-11 12:54:01,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:54:01,528 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:01,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:01,529 INFO L225 Difference]: With dead ends: 294 [2020-10-11 12:54:01,529 INFO L226 Difference]: Without dead ends: 292 [2020-10-11 12:54:01,529 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 12:54:01,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-11 12:54:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 166. [2020-10-11 12:54:01,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:54:01,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 423 transitions. [2020-10-11 12:54:01,532 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 423 transitions. Word has length 14 [2020-10-11 12:54:01,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:01,532 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 423 transitions. [2020-10-11 12:54:01,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:01,533 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 423 transitions. [2020-10-11 12:54:01,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:01,533 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:01,533 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:01,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:01,734 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:01,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:01,734 INFO L82 PathProgramCache]: Analyzing trace with hash 999777643, now seen corresponding path program 228 times [2020-10-11 12:54:01,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:01,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424173468] [2020-10-11 12:54:01,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:01,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424173468] [2020-10-11 12:54:01,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757215517] [2020-10-11 12:54:01,975 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 [2020-10-11 12:54:02,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:54:02,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:02,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:02,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:02,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:02,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:02,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100446083] [2020-10-11 12:54:02,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:02,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:02,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:02,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:02,530 INFO L87 Difference]: Start difference. First operand 166 states and 423 transitions. Second operand 17 states. [2020-10-11 12:54:03,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:03,977 INFO L93 Difference]: Finished difference Result 266 states and 625 transitions. [2020-10-11 12:54:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 12:54:03,980 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:03,981 INFO L225 Difference]: With dead ends: 266 [2020-10-11 12:54:03,981 INFO L226 Difference]: Without dead ends: 264 [2020-10-11 12:54:03,982 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=316, Invalid=806, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 12:54:03,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-11 12:54:03,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 164. [2020-10-11 12:54:03,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:54:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-10-11 12:54:03,985 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-10-11 12:54:03,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:03,986 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-10-11 12:54:03,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-10-11 12:54:03,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:03,986 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:03,986 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:04,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:04,187 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:04,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1000439772, now seen corresponding path program 229 times [2020-10-11 12:54:04,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:04,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714718877] [2020-10-11 12:54:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:04,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714718877] [2020-10-11 12:54:04,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672752543] [2020-10-11 12:54:04,421 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 [2020-10-11 12:54:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:04,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:04,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:04,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:04,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:04,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477198255] [2020-10-11 12:54:04,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:04,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:04,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:04,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:04,835 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-10-11 12:54:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:06,708 INFO L93 Difference]: Finished difference Result 275 states and 656 transitions. [2020-10-11 12:54:06,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:54:06,711 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:06,711 INFO L225 Difference]: With dead ends: 275 [2020-10-11 12:54:06,712 INFO L226 Difference]: Without dead ends: 273 [2020-10-11 12:54:06,712 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 12:54:06,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-11 12:54:06,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 166. [2020-10-11 12:54:06,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:54:06,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-11 12:54:06,715 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-11 12:54:06,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:06,715 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-11 12:54:06,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:06,716 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-11 12:54:06,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:06,716 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:06,716 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:06,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:06,917 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:06,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:06,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1000461131, now seen corresponding path program 230 times [2020-10-11 12:54:06,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:06,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330811380] [2020-10-11 12:54:06,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:07,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330811380] [2020-10-11 12:54:07,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108715634] [2020-10-11 12:54:07,155 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 [2020-10-11 12:54:07,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:54:07,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:07,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:07,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:07,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:54:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:07,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:07,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:07,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107533826] [2020-10-11 12:54:07,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:07,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:07,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:07,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:07,509 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-11 12:54:09,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:09,381 INFO L93 Difference]: Finished difference Result 285 states and 690 transitions. [2020-10-11 12:54:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 12:54:09,385 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:09,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:09,385 INFO L225 Difference]: With dead ends: 285 [2020-10-11 12:54:09,385 INFO L226 Difference]: Without dead ends: 277 [2020-10-11 12:54:09,385 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 12:54:09,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-11 12:54:09,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 166. [2020-10-11 12:54:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:54:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-11 12:54:09,390 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-11 12:54:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:09,390 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-11 12:54:09,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:09,390 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-11 12:54:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:09,390 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:09,391 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:09,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2020-10-11 12:54:09,595 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:09,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:09,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1000462092, now seen corresponding path program 231 times [2020-10-11 12:54:09,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:09,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842542842] [2020-10-11 12:54:09,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:09,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842542842] [2020-10-11 12:54:09,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444887272] [2020-10-11 12:54:09,853 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 [2020-10-11 12:54:09,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:54:09,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:09,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:09,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:10,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:54:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:10,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:10,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:10,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119937697] [2020-10-11 12:54:10,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:10,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:10,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:10,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:10,360 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-11 12:54:12,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:12,452 INFO L93 Difference]: Finished difference Result 307 states and 744 transitions. [2020-10-11 12:54:12,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 12:54:12,454 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:12,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:12,455 INFO L225 Difference]: With dead ends: 307 [2020-10-11 12:54:12,455 INFO L226 Difference]: Without dead ends: 299 [2020-10-11 12:54:12,455 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 12:54:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-11 12:54:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 164. [2020-10-11 12:54:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:54:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-10-11 12:54:12,459 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-10-11 12:54:12,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:12,459 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-10-11 12:54:12,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:12,459 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-10-11 12:54:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:12,459 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:12,459 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:12,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:12,661 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:12,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:12,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1000469563, now seen corresponding path program 232 times [2020-10-11 12:54:12,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:12,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949169572] [2020-10-11 12:54:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:12,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949169572] [2020-10-11 12:54:12,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072980006] [2020-10-11 12:54:12,882 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 [2020-10-11 12:54:12,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:54:12,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:12,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:12,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:13,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:13,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:13,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119589379] [2020-10-11 12:54:13,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:13,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:13,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:13,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:13,305 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-10-11 12:54:15,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:15,077 INFO L93 Difference]: Finished difference Result 280 states and 668 transitions. [2020-10-11 12:54:15,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 12:54:15,080 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:15,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:15,081 INFO L225 Difference]: With dead ends: 280 [2020-10-11 12:54:15,081 INFO L226 Difference]: Without dead ends: 278 [2020-10-11 12:54:15,081 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 12:54:15,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-11 12:54:15,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 166. [2020-10-11 12:54:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-11 12:54:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-11 12:54:15,085 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-11 12:54:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:15,085 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-11 12:54:15,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-11 12:54:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:15,085 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:15,085 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:15,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-10-11 12:54:15,286 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:15,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:15,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1000490922, now seen corresponding path program 233 times [2020-10-11 12:54:15,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:15,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794416496] [2020-10-11 12:54:15,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:15,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794416496] [2020-10-11 12:54:15,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764706093] [2020-10-11 12:54:15,540 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 [2020-10-11 12:54:15,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:54:15,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:15,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:15,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:15,924 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:54:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:15,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:15,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:15,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717094489] [2020-10-11 12:54:15,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:15,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:15,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:15,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:15,956 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-11 12:54:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:18,012 INFO L93 Difference]: Finished difference Result 315 states and 764 transitions. [2020-10-11 12:54:18,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 12:54:18,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:18,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:18,016 INFO L225 Difference]: With dead ends: 315 [2020-10-11 12:54:18,016 INFO L226 Difference]: Without dead ends: 307 [2020-10-11 12:54:18,017 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 12:54:18,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-11 12:54:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 164. [2020-10-11 12:54:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-11 12:54:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 414 transitions. [2020-10-11 12:54:18,020 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 414 transitions. Word has length 14 [2020-10-11 12:54:18,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:18,020 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 414 transitions. [2020-10-11 12:54:18,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 414 transitions. [2020-10-11 12:54:18,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:18,021 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:18,021 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:18,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:18,221 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:18,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:18,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1000491883, now seen corresponding path program 234 times [2020-10-11 12:54:18,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:18,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653185876] [2020-10-11 12:54:18,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:18,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653185876] [2020-10-11 12:54:18,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064748312] [2020-10-11 12:54:18,479 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 [2020-10-11 12:54:18,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:54:18,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:18,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:18,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:18,871 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:54:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:18,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:18,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:18,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448955465] [2020-10-11 12:54:18,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:18,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:18,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:18,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:18,907 INFO L87 Difference]: Start difference. First operand 164 states and 414 transitions. Second operand 17 states. [2020-10-11 12:54:21,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:21,259 INFO L93 Difference]: Finished difference Result 312 states and 754 transitions. [2020-10-11 12:54:21,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:54:21,262 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:21,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:21,263 INFO L225 Difference]: With dead ends: 312 [2020-10-11 12:54:21,263 INFO L226 Difference]: Without dead ends: 304 [2020-10-11 12:54:21,264 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 12:54:21,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-11 12:54:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 157. [2020-10-11 12:54:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-11 12:54:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 391 transitions. [2020-10-11 12:54:21,267 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 391 transitions. Word has length 14 [2020-10-11 12:54:21,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:21,267 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 391 transitions. [2020-10-11 12:54:21,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 391 transitions. [2020-10-11 12:54:21,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:21,267 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:21,268 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:21,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-10-11 12:54:21,468 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:21,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1001384652, now seen corresponding path program 235 times [2020-10-11 12:54:21,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:21,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218594637] [2020-10-11 12:54:21,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:21,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218594637] [2020-10-11 12:54:21,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371957070] [2020-10-11 12:54:21,669 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 [2020-10-11 12:54:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:21,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:21,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:21,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:54:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:22,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:22,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:22,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886087186] [2020-10-11 12:54:22,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:22,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:22,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:22,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:22,020 INFO L87 Difference]: Start difference. First operand 157 states and 391 transitions. Second operand 17 states. [2020-10-11 12:54:24,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:24,166 INFO L93 Difference]: Finished difference Result 307 states and 730 transitions. [2020-10-11 12:54:24,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 12:54:24,168 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:24,169 INFO L225 Difference]: With dead ends: 307 [2020-10-11 12:54:24,169 INFO L226 Difference]: Without dead ends: 299 [2020-10-11 12:54:24,170 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 12:54:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-11 12:54:24,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 155. [2020-10-11 12:54:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-11 12:54:24,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 381 transitions. [2020-10-11 12:54:24,173 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 381 transitions. Word has length 14 [2020-10-11 12:54:24,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:24,173 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 381 transitions. [2020-10-11 12:54:24,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:24,173 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 381 transitions. [2020-10-11 12:54:24,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:24,174 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:24,174 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:24,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:24,375 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:24,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:24,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1866754364, now seen corresponding path program 236 times [2020-10-11 12:54:24,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:24,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273995902] [2020-10-11 12:54:24,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:24,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273995902] [2020-10-11 12:54:24,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098716614] [2020-10-11 12:54:24,619 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 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 [2020-10-11 12:54:24,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:54:24,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:24,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:24,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:25,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:25,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:25,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659042710] [2020-10-11 12:54:25,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:25,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:25,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:25,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:25,019 INFO L87 Difference]: Start difference. First operand 155 states and 381 transitions. Second operand 17 states. [2020-10-11 12:54:25,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:25,721 INFO L93 Difference]: Finished difference Result 225 states and 519 transitions. [2020-10-11 12:54:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:54:25,723 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:25,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:25,724 INFO L225 Difference]: With dead ends: 225 [2020-10-11 12:54:25,724 INFO L226 Difference]: Without dead ends: 223 [2020-10-11 12:54:25,725 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-11 12:54:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-11 12:54:25,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 153. [2020-10-11 12:54:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-11 12:54:25,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 376 transitions. [2020-10-11 12:54:25,727 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 376 transitions. Word has length 14 [2020-10-11 12:54:25,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:25,727 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 376 transitions. [2020-10-11 12:54:25,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 376 transitions. [2020-10-11 12:54:25,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:25,728 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:25,728 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:25,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-10-11 12:54:25,929 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:25,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:25,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1888203884, now seen corresponding path program 237 times [2020-10-11 12:54:25,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:25,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256204581] [2020-10-11 12:54:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:26,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256204581] [2020-10-11 12:54:26,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031544824] [2020-10-11 12:54:26,144 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 [2020-10-11 12:54:26,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:54:26,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:26,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:26,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:26,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:26,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:26,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967254270] [2020-10-11 12:54:26,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:26,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:26,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:26,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:26,544 INFO L87 Difference]: Start difference. First operand 153 states and 376 transitions. Second operand 17 states. [2020-10-11 12:54:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:27,231 INFO L93 Difference]: Finished difference Result 223 states and 512 transitions. [2020-10-11 12:54:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:54:27,233 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:27,234 INFO L225 Difference]: With dead ends: 223 [2020-10-11 12:54:27,234 INFO L226 Difference]: Without dead ends: 221 [2020-10-11 12:54:27,234 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:54:27,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-11 12:54:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 151. [2020-10-11 12:54:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-11 12:54:27,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 371 transitions. [2020-10-11 12:54:27,237 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 371 transitions. Word has length 14 [2020-10-11 12:54:27,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:27,237 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 371 transitions. [2020-10-11 12:54:27,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 371 transitions. [2020-10-11 12:54:27,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:27,237 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:27,237 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:27,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2020-10-11 12:54:27,438 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:27,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:27,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1888866974, now seen corresponding path program 238 times [2020-10-11 12:54:27,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:27,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273696146] [2020-10-11 12:54:27,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:27,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273696146] [2020-10-11 12:54:27,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640059188] [2020-10-11 12:54:27,667 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 [2020-10-11 12:54:27,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:54:27,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:27,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:27,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:28,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:28,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:28,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525614509] [2020-10-11 12:54:28,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:28,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:28,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:28,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:28,213 INFO L87 Difference]: Start difference. First operand 151 states and 371 transitions. Second operand 17 states. [2020-10-11 12:54:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:29,174 INFO L93 Difference]: Finished difference Result 221 states and 510 transitions. [2020-10-11 12:54:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:54:29,177 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:29,178 INFO L225 Difference]: With dead ends: 221 [2020-10-11 12:54:29,178 INFO L226 Difference]: Without dead ends: 219 [2020-10-11 12:54:29,178 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=229, Invalid=527, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:54:29,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-11 12:54:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 152. [2020-10-11 12:54:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-11 12:54:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 373 transitions. [2020-10-11 12:54:29,182 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 373 transitions. Word has length 14 [2020-10-11 12:54:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:29,182 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 373 transitions. [2020-10-11 12:54:29,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 373 transitions. [2020-10-11 12:54:29,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:29,183 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:29,183 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:29,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:29,383 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:29,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1888889294, now seen corresponding path program 239 times [2020-10-11 12:54:29,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:29,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258249156] [2020-10-11 12:54:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:29,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258249156] [2020-10-11 12:54:29,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267538212] [2020-10-11 12:54:29,627 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 [2020-10-11 12:54:29,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:54:29,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:29,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:29,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:30,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 12:54:34,243 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-11 12:54:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:34,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:34,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-11 12:54:34,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367182829] [2020-10-11 12:54:34,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 12:54:34,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:34,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 12:54:34,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-10-11 12:54:34,247 INFO L87 Difference]: Start difference. First operand 152 states and 373 transitions. Second operand 18 states. [2020-10-11 12:54:55,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:55,946 INFO L93 Difference]: Finished difference Result 263 states and 608 transitions. [2020-10-11 12:54:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 12:54:55,957 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-11 12:54:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:55,958 INFO L225 Difference]: With dead ends: 263 [2020-10-11 12:54:55,958 INFO L226 Difference]: Without dead ends: 258 [2020-10-11 12:54:55,958 INFO L673 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 [2020-10-11 12:54:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-11 12:54:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 150. [2020-10-11 12:54:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-11 12:54:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 366 transitions. [2020-10-11 12:54:55,961 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 366 transitions. Word has length 14 [2020-10-11 12:54:55,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:55,961 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 366 transitions. [2020-10-11 12:54:55,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 12:54:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 366 transitions. [2020-10-11 12:54:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:55,961 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:55,961 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:56,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:56,162 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:56,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1888918124, now seen corresponding path program 240 times [2020-10-11 12:54:56,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:56,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621068893] [2020-10-11 12:54:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:56,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621068893] [2020-10-11 12:54:56,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926564403] [2020-10-11 12:54:56,401 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 [2020-10-11 12:54:56,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:54:56,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:56,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 12:54:56,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:56,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 12:54:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:56,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:54:56,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-11 12:54:56,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123949736] [2020-10-11 12:54:56,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 12:54:56,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:56,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 12:54:56,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-11 12:54:56,859 INFO L87 Difference]: Start difference. First operand 150 states and 366 transitions. Second operand 17 states. [2020-10-11 12:54:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:57,782 INFO L93 Difference]: Finished difference Result 225 states and 522 transitions. [2020-10-11 12:54:57,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:54:57,786 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-11 12:54:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:57,787 INFO L225 Difference]: With dead ends: 225 [2020-10-11 12:54:57,787 INFO L226 Difference]: Without dead ends: 220 [2020-10-11 12:54:57,787 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:54:57,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-11 12:54:57,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 146. [2020-10-11 12:54:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-11 12:54:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 342 transitions. [2020-10-11 12:54:57,790 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 342 transitions. Word has length 14 [2020-10-11 12:54:57,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:57,791 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 342 transitions. [2020-10-11 12:54:57,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 12:54:57,791 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 342 transitions. [2020-10-11 12:54:57,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:57,791 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:57,791 INFO L421 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:57,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:58,000 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:58,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:58,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1949255125, now seen corresponding path program 7 times [2020-10-11 12:54:58,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:58,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348040942] [2020-10-11 12:54:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:58,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348040942] [2020-10-11 12:54:58,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035175331] [2020-10-11 12:54:58,288 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 [2020-10-11 12:54:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:58,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:54:58,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:58,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 12:54:58,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-10-11 12:54:58,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844088397] [2020-10-11 12:54:58,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 12:54:58,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:58,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 12:54:58,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:54:58,607 INFO L87 Difference]: Start difference. First operand 146 states and 342 transitions. Second operand 9 states. [2020-10-11 12:54:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:58,683 INFO L93 Difference]: Finished difference Result 235 states and 626 transitions. [2020-10-11 12:54:58,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:54:58,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-11 12:54:58,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:58,687 INFO L225 Difference]: With dead ends: 235 [2020-10-11 12:54:58,687 INFO L226 Difference]: Without dead ends: 227 [2020-10-11 12:54:58,687 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:54:58,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-11 12:54:58,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2020-10-11 12:54:58,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-11 12:54:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 611 transitions. [2020-10-11 12:54:58,691 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 611 transitions. Word has length 14 [2020-10-11 12:54:58,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:58,691 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 611 transitions. [2020-10-11 12:54:58,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 12:54:58,691 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 611 transitions. [2020-10-11 12:54:58,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 12:54:58,691 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:58,691 INFO L421 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:58,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:54:58,892 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:58,893 INFO L82 PathProgramCache]: Analyzing trace with hash 163688120, now seen corresponding path program 28 times [2020-10-11 12:54:58,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:58,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844058287] [2020-10-11 12:54:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:54:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:59,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844058287] [2020-10-11 12:54:59,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386854388] [2020-10-11 12:54:59,248 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 [2020-10-11 12:54:59,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:54:59,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:54:59,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 12:54:59,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:54:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:54:59,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 12:54:59,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-10-11 12:54:59,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305723762] [2020-10-11 12:54:59,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 12:54:59,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:54:59,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 12:54:59,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:54:59,552 INFO L87 Difference]: Start difference. First operand 227 states and 611 transitions. Second operand 9 states. [2020-10-11 12:54:59,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:54:59,623 INFO L93 Difference]: Finished difference Result 338 states and 895 transitions. [2020-10-11 12:54:59,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 12:54:59,626 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-11 12:54:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:54:59,627 INFO L225 Difference]: With dead ends: 338 [2020-10-11 12:54:59,627 INFO L226 Difference]: Without dead ends: 312 [2020-10-11 12:54:59,627 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-11 12:54:59,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-11 12:54:59,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2020-10-11 12:54:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-11 12:54:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 836 transitions. [2020-10-11 12:54:59,632 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 836 transitions. Word has length 14 [2020-10-11 12:54:59,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:54:59,633 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 836 transitions. [2020-10-11 12:54:59,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 12:54:59,633 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 836 transitions. [2020-10-11 12:54:59,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:54:59,633 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:54:59,633 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:54:59,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2020-10-11 12:54:59,834 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:54:59,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:54:59,835 INFO L82 PathProgramCache]: Analyzing trace with hash 491277249, now seen corresponding path program 241 times [2020-10-11 12:54:59,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:54:59,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667864835] [2020-10-11 12:54:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:54:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:00,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667864835] [2020-10-11 12:55:00,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526893324] [2020-10-11 12:55:00,170 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 [2020-10-11 12:55:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:00,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:00,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:00,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:00,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:00,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107308110] [2020-10-11 12:55:00,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:00,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:00,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:00,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:00,734 INFO L87 Difference]: Start difference. First operand 312 states and 836 transitions. Second operand 19 states. [2020-10-11 12:55:00,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:00,889 INFO L93 Difference]: Finished difference Result 353 states and 914 transitions. [2020-10-11 12:55:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 12:55:00,891 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:00,892 INFO L225 Difference]: With dead ends: 353 [2020-10-11 12:55:00,892 INFO L226 Difference]: Without dead ends: 351 [2020-10-11 12:55:00,892 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:00,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-11 12:55:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 324. [2020-10-11 12:55:00,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-11 12:55:00,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 870 transitions. [2020-10-11 12:55:00,901 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 870 transitions. Word has length 15 [2020-10-11 12:55:00,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:00,901 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 870 transitions. [2020-10-11 12:55:00,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:00,901 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 870 transitions. [2020-10-11 12:55:00,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:00,901 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:00,901 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:01,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:01,102 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:01,103 INFO L82 PathProgramCache]: Analyzing trace with hash 491278210, now seen corresponding path program 242 times [2020-10-11 12:55:01,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:01,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409191365] [2020-10-11 12:55:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:01,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409191365] [2020-10-11 12:55:01,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928652236] [2020-10-11 12:55:01,410 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 [2020-10-11 12:55:01,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:55:01,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:01,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:01,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:01,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:01,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:01,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076563741] [2020-10-11 12:55:01,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:01,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:01,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:01,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:01,973 INFO L87 Difference]: Start difference. First operand 324 states and 870 transitions. Second operand 19 states. [2020-10-11 12:55:02,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:02,588 INFO L93 Difference]: Finished difference Result 377 states and 965 transitions. [2020-10-11 12:55:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:55:02,592 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:02,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:02,593 INFO L225 Difference]: With dead ends: 377 [2020-10-11 12:55:02,593 INFO L226 Difference]: Without dead ends: 374 [2020-10-11 12:55:02,593 INFO L673 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 [2020-10-11 12:55:02,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-11 12:55:02,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 325. [2020-10-11 12:55:02,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-11 12:55:02,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 873 transitions. [2020-10-11 12:55:02,598 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 873 transitions. Word has length 15 [2020-10-11 12:55:02,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:02,598 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 873 transitions. [2020-10-11 12:55:02,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:02,598 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 873 transitions. [2020-10-11 12:55:02,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:02,599 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:02,599 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:02,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-10-11 12:55:02,800 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:02,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:02,800 INFO L82 PathProgramCache]: Analyzing trace with hash 491307040, now seen corresponding path program 243 times [2020-10-11 12:55:02,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:02,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328498898] [2020-10-11 12:55:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:03,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328498898] [2020-10-11 12:55:03,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647442266] [2020-10-11 12:55:03,092 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 [2020-10-11 12:55:03,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:55:03,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:03,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:03,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:05,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:05,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:05,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774493976] [2020-10-11 12:55:05,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:05,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:05,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:05,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:05,364 INFO L87 Difference]: Start difference. First operand 325 states and 873 transitions. Second operand 19 states. [2020-10-11 12:55:06,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:06,142 INFO L93 Difference]: Finished difference Result 408 states and 1035 transitions. [2020-10-11 12:55:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:55:06,147 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:06,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:06,148 INFO L225 Difference]: With dead ends: 408 [2020-10-11 12:55:06,148 INFO L226 Difference]: Without dead ends: 404 [2020-10-11 12:55:06,148 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:55:06,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-11 12:55:06,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 327. [2020-10-11 12:55:06,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-11 12:55:06,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 879 transitions. [2020-10-11 12:55:06,159 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 879 transitions. Word has length 15 [2020-10-11 12:55:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:06,159 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 879 transitions. [2020-10-11 12:55:06,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:06,160 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 879 transitions. [2020-10-11 12:55:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:06,160 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:06,160 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:06,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:06,361 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:06,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:06,362 INFO L82 PathProgramCache]: Analyzing trace with hash 492200770, now seen corresponding path program 244 times [2020-10-11 12:55:06,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:06,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973565467] [2020-10-11 12:55:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:06,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973565467] [2020-10-11 12:55:06,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257786287] [2020-10-11 12:55:06,681 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 [2020-10-11 12:55:06,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:55:06,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:06,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:06,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:13,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:13,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:13,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616772852] [2020-10-11 12:55:13,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:13,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:13,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:13,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:13,455 INFO L87 Difference]: Start difference. First operand 327 states and 879 transitions. Second operand 19 states. [2020-10-11 12:55:14,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:14,365 INFO L93 Difference]: Finished difference Result 406 states and 1027 transitions. [2020-10-11 12:55:14,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 12:55:14,369 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:14,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:14,370 INFO L225 Difference]: With dead ends: 406 [2020-10-11 12:55:14,370 INFO L226 Difference]: Without dead ends: 403 [2020-10-11 12:55:14,371 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2020-10-11 12:55:14,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-11 12:55:14,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 329. [2020-10-11 12:55:14,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-11 12:55:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 885 transitions. [2020-10-11 12:55:14,378 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 885 transitions. Word has length 15 [2020-10-11 12:55:14,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:14,378 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 885 transitions. [2020-10-11 12:55:14,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 885 transitions. [2020-10-11 12:55:14,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:14,379 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:14,379 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:14,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-10-11 12:55:14,592 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:14,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:14,592 INFO L82 PathProgramCache]: Analyzing trace with hash 492201731, now seen corresponding path program 245 times [2020-10-11 12:55:14,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:14,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219212912] [2020-10-11 12:55:14,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:14,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219212912] [2020-10-11 12:55:14,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688328702] [2020-10-11 12:55:14,886 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 [2020-10-11 12:55:14,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:55:14,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:14,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:14,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:19,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:19,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:19,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746932805] [2020-10-11 12:55:19,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:19,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:19,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:19,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=236, Unknown=1, NotChecked=0, Total=342 [2020-10-11 12:55:19,615 INFO L87 Difference]: Start difference. First operand 329 states and 885 transitions. Second operand 19 states. [2020-10-11 12:55:24,064 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-11 12:55:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:24,838 INFO L93 Difference]: Finished difference Result 437 states and 1102 transitions. [2020-10-11 12:55:24,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:55:24,842 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:24,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:24,843 INFO L225 Difference]: With dead ends: 437 [2020-10-11 12:55:24,843 INFO L226 Difference]: Without dead ends: 432 [2020-10-11 12:55:24,844 INFO L673 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 [2020-10-11 12:55:24,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-11 12:55:24,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 330. [2020-10-11 12:55:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-11 12:55:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2020-10-11 12:55:24,849 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 15 [2020-10-11 12:55:24,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:24,849 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2020-10-11 12:55:24,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:24,850 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2020-10-11 12:55:24,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:24,850 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:24,850 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:25,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:25,051 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:25,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:25,051 INFO L82 PathProgramCache]: Analyzing trace with hash 492230561, now seen corresponding path program 246 times [2020-10-11 12:55:25,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:25,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105645144] [2020-10-11 12:55:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:25,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105645144] [2020-10-11 12:55:25,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486280258] [2020-10-11 12:55:25,303 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 [2020-10-11 12:55:25,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:55:25,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:25,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:25,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:26,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:26,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:26,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152363413] [2020-10-11 12:55:26,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:26,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:26,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:26,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:26,019 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand 19 states. [2020-10-11 12:55:27,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:27,105 INFO L93 Difference]: Finished difference Result 427 states and 1079 transitions. [2020-10-11 12:55:27,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:55:27,108 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:27,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:27,109 INFO L225 Difference]: With dead ends: 427 [2020-10-11 12:55:27,109 INFO L226 Difference]: Without dead ends: 423 [2020-10-11 12:55:27,110 INFO L673 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 [2020-10-11 12:55:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-11 12:55:27,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 330. [2020-10-11 12:55:27,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-11 12:55:27,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2020-10-11 12:55:27,115 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 15 [2020-10-11 12:55:27,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:27,115 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2020-10-11 12:55:27,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2020-10-11 12:55:27,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:27,115 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:27,115 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:27,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:27,316 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:27,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:27,317 INFO L82 PathProgramCache]: Analyzing trace with hash 519906400, now seen corresponding path program 247 times [2020-10-11 12:55:27,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:27,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740249843] [2020-10-11 12:55:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:27,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740249843] [2020-10-11 12:55:27,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143727965] [2020-10-11 12:55:27,567 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 [2020-10-11 12:55:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:27,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:27,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:28,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:28,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:28,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314799803] [2020-10-11 12:55:28,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:28,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:28,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:28,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:28,361 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand 19 states. [2020-10-11 12:55:29,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:29,682 INFO L93 Difference]: Finished difference Result 411 states and 1040 transitions. [2020-10-11 12:55:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:55:29,685 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:29,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:29,685 INFO L225 Difference]: With dead ends: 411 [2020-10-11 12:55:29,685 INFO L226 Difference]: Without dead ends: 408 [2020-10-11 12:55:29,685 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:55:29,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-11 12:55:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 333. [2020-10-11 12:55:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-11 12:55:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 897 transitions. [2020-10-11 12:55:29,690 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 897 transitions. Word has length 15 [2020-10-11 12:55:29,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:29,690 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 897 transitions. [2020-10-11 12:55:29,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:29,690 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 897 transitions. [2020-10-11 12:55:29,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:29,690 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:29,690 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:29,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2020-10-11 12:55:29,891 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:29,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:29,892 INFO L82 PathProgramCache]: Analyzing trace with hash 519907361, now seen corresponding path program 248 times [2020-10-11 12:55:29,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:29,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38233705] [2020-10-11 12:55:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:30,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38233705] [2020-10-11 12:55:30,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424901395] [2020-10-11 12:55:30,190 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 [2020-10-11 12:55:30,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:55:30,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:30,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:30,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:30,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:30,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:30,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035717809] [2020-10-11 12:55:30,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:30,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:30,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:30,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:55:30,809 INFO L87 Difference]: Start difference. First operand 333 states and 897 transitions. Second operand 19 states. [2020-10-11 12:55:31,674 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-11 12:55:32,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:55:32,075 INFO L93 Difference]: Finished difference Result 441 states and 1112 transitions. [2020-10-11 12:55:32,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:55:32,078 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:55:32,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:55:32,079 INFO L225 Difference]: With dead ends: 441 [2020-10-11 12:55:32,079 INFO L226 Difference]: Without dead ends: 436 [2020-10-11 12:55:32,079 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:55:32,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-11 12:55:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 333. [2020-10-11 12:55:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-11 12:55:32,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 897 transitions. [2020-10-11 12:55:32,084 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 897 transitions. Word has length 15 [2020-10-11 12:55:32,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:55:32,085 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 897 transitions. [2020-10-11 12:55:32,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:55:32,085 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 897 transitions. [2020-10-11 12:55:32,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:55:32,085 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:55:32,085 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:55:32,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:55:32,286 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:55:32,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:55:32,286 INFO L82 PathProgramCache]: Analyzing trace with hash 519936191, now seen corresponding path program 249 times [2020-10-11 12:55:32,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:55:32,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050773654] [2020-10-11 12:55:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:55:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:55:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:32,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050773654] [2020-10-11 12:55:32,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365197959] [2020-10-11 12:55:32,599 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 [2020-10-11 12:55:32,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:55:32,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:55:32,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:55:32,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:55:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:55:57,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:55:57,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:55:57,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143761318] [2020-10-11 12:55:57,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:55:57,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:55:57,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:55:57,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=228, Unknown=9, NotChecked=0, Total=342 [2020-10-11 12:55:57,400 INFO L87 Difference]: Start difference. First operand 333 states and 897 transitions. Second operand 19 states. [2020-10-11 12:56:01,757 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:56:11,284 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-10-11 12:56:15,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:15,080 INFO L93 Difference]: Finished difference Result 455 states and 1144 transitions. [2020-10-11 12:56:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:56:15,083 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:15,084 INFO L225 Difference]: With dead ends: 455 [2020-10-11 12:56:15,084 INFO L226 Difference]: Without dead ends: 450 [2020-10-11 12:56:15,085 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=253, Invalid=492, Unknown=11, NotChecked=0, Total=756 [2020-10-11 12:56:15,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-11 12:56:15,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 334. [2020-10-11 12:56:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-11 12:56:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 900 transitions. [2020-10-11 12:56:15,089 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 900 transitions. Word has length 15 [2020-10-11 12:56:15,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:15,090 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 900 transitions. [2020-10-11 12:56:15,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:15,090 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 900 transitions. [2020-10-11 12:56:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:15,090 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:15,090 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:15,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:15,291 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:15,291 INFO L82 PathProgramCache]: Analyzing trace with hash 520830882, now seen corresponding path program 250 times [2020-10-11 12:56:15,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:15,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160403546] [2020-10-11 12:56:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:15,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160403546] [2020-10-11 12:56:15,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987681960] [2020-10-11 12:56:15,570 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 [2020-10-11 12:56:15,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:56:15,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:15,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:15,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:19,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:19,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:19,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219330731] [2020-10-11 12:56:19,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:19,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:19,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:19,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:19,366 INFO L87 Difference]: Start difference. First operand 334 states and 900 transitions. Second operand 19 states. [2020-10-11 12:56:20,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:20,562 INFO L93 Difference]: Finished difference Result 464 states and 1169 transitions. [2020-10-11 12:56:20,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:56:20,566 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:20,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:20,567 INFO L225 Difference]: With dead ends: 464 [2020-10-11 12:56:20,567 INFO L226 Difference]: Without dead ends: 458 [2020-10-11 12:56:20,567 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:56:20,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-10-11 12:56:20,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 334. [2020-10-11 12:56:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-11 12:56:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 900 transitions. [2020-10-11 12:56:20,573 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 900 transitions. Word has length 15 [2020-10-11 12:56:20,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:20,573 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 900 transitions. [2020-10-11 12:56:20,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 900 transitions. [2020-10-11 12:56:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:20,573 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:20,573 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:20,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:20,774 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:20,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:20,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1378780930, now seen corresponding path program 251 times [2020-10-11 12:56:20,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:20,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905558621] [2020-10-11 12:56:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:21,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905558621] [2020-10-11 12:56:21,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362571143] [2020-10-11 12:56:21,105 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 [2020-10-11 12:56:21,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:56:21,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:21,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:21,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:21,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:21,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:21,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12524628] [2020-10-11 12:56:21,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:21,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:21,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:21,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:21,686 INFO L87 Difference]: Start difference. First operand 334 states and 900 transitions. Second operand 19 states. [2020-10-11 12:56:22,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:22,754 INFO L93 Difference]: Finished difference Result 414 states and 1047 transitions. [2020-10-11 12:56:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:56:22,757 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:22,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:22,758 INFO L225 Difference]: With dead ends: 414 [2020-10-11 12:56:22,758 INFO L226 Difference]: Without dead ends: 411 [2020-10-11 12:56:22,758 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:56:22,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-11 12:56:22,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 338. [2020-10-11 12:56:22,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-11 12:56:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 912 transitions. [2020-10-11 12:56:22,772 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 912 transitions. Word has length 15 [2020-10-11 12:56:22,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:22,772 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 912 transitions. [2020-10-11 12:56:22,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:22,772 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 912 transitions. [2020-10-11 12:56:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:22,772 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:22,773 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:22,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:22,973 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:22,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:22,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1378781891, now seen corresponding path program 252 times [2020-10-11 12:56:22,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:22,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898351255] [2020-10-11 12:56:22,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:23,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898351255] [2020-10-11 12:56:23,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724767133] [2020-10-11 12:56:23,244 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 [2020-10-11 12:56:23,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:56:23,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:23,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:23,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:23,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:23,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:23,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186670157] [2020-10-11 12:56:23,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:23,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:23,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:23,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:23,844 INFO L87 Difference]: Start difference. First operand 338 states and 912 transitions. Second operand 19 states. [2020-10-11 12:56:24,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:24,846 INFO L93 Difference]: Finished difference Result 441 states and 1109 transitions. [2020-10-11 12:56:24,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:56:24,849 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:24,850 INFO L225 Difference]: With dead ends: 441 [2020-10-11 12:56:24,850 INFO L226 Difference]: Without dead ends: 437 [2020-10-11 12:56:24,850 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:56:24,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-11 12:56:24,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 337. [2020-10-11 12:56:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-11 12:56:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 909 transitions. [2020-10-11 12:56:24,855 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 909 transitions. Word has length 15 [2020-10-11 12:56:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:24,855 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 909 transitions. [2020-10-11 12:56:24,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 909 transitions. [2020-10-11 12:56:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:24,856 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:24,856 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:25,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-10-11 12:56:25,056 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:25,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:25,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1378810721, now seen corresponding path program 253 times [2020-10-11 12:56:25,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:25,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100850980] [2020-10-11 12:56:25,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:25,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100850980] [2020-10-11 12:56:25,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929630356] [2020-10-11 12:56:25,316 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 [2020-10-11 12:56:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:25,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:25,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:26,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:26,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:26,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259197820] [2020-10-11 12:56:26,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:26,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:26,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:26,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:26,136 INFO L87 Difference]: Start difference. First operand 337 states and 909 transitions. Second operand 19 states. [2020-10-11 12:56:27,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:27,172 INFO L93 Difference]: Finished difference Result 454 states and 1141 transitions. [2020-10-11 12:56:27,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:56:27,175 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:27,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:27,176 INFO L225 Difference]: With dead ends: 454 [2020-10-11 12:56:27,176 INFO L226 Difference]: Without dead ends: 449 [2020-10-11 12:56:27,176 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:56:27,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-10-11 12:56:27,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 336. [2020-10-11 12:56:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-11 12:56:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 906 transitions. [2020-10-11 12:56:27,181 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 906 transitions. Word has length 15 [2020-10-11 12:56:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:27,181 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 906 transitions. [2020-10-11 12:56:27,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:27,181 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 906 transitions. [2020-10-11 12:56:27,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:27,182 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:27,182 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:27,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-10-11 12:56:27,383 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:27,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:27,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1379704451, now seen corresponding path program 254 times [2020-10-11 12:56:27,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:27,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147009833] [2020-10-11 12:56:27,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:27,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147009833] [2020-10-11 12:56:27,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074430548] [2020-10-11 12:56:27,681 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 [2020-10-11 12:56:27,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:56:27,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:27,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:27,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:28,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:28,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:28,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767690719] [2020-10-11 12:56:28,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:28,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:28,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:28,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:28,240 INFO L87 Difference]: Start difference. First operand 336 states and 906 transitions. Second operand 19 states. [2020-10-11 12:56:29,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:29,275 INFO L93 Difference]: Finished difference Result 464 states and 1163 transitions. [2020-10-11 12:56:29,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:56:29,277 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:29,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:29,279 INFO L225 Difference]: With dead ends: 464 [2020-10-11 12:56:29,279 INFO L226 Difference]: Without dead ends: 459 [2020-10-11 12:56:29,279 INFO L673 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 [2020-10-11 12:56:29,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-11 12:56:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 341. [2020-10-11 12:56:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-11 12:56:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 921 transitions. [2020-10-11 12:56:29,284 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 921 transitions. Word has length 15 [2020-10-11 12:56:29,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:29,284 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 921 transitions. [2020-10-11 12:56:29,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:29,284 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 921 transitions. [2020-10-11 12:56:29,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:29,285 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:29,285 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:29,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-10-11 12:56:29,486 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:29,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:29,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1379705412, now seen corresponding path program 255 times [2020-10-11 12:56:29,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:29,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631721548] [2020-10-11 12:56:29,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:29,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631721548] [2020-10-11 12:56:29,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512248990] [2020-10-11 12:56:29,748 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 [2020-10-11 12:56:29,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:56:29,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:29,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:29,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:30,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:30,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:30,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805469377] [2020-10-11 12:56:30,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:30,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:30,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:30,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:30,259 INFO L87 Difference]: Start difference. First operand 341 states and 921 transitions. Second operand 19 states. [2020-10-11 12:56:31,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:31,179 INFO L93 Difference]: Finished difference Result 475 states and 1194 transitions. [2020-10-11 12:56:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:56:31,183 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:31,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:31,184 INFO L225 Difference]: With dead ends: 475 [2020-10-11 12:56:31,184 INFO L226 Difference]: Without dead ends: 469 [2020-10-11 12:56:31,185 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:56:31,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-11 12:56:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 342. [2020-10-11 12:56:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-11 12:56:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 924 transitions. [2020-10-11 12:56:31,190 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 924 transitions. Word has length 15 [2020-10-11 12:56:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:31,190 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 924 transitions. [2020-10-11 12:56:31,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 924 transitions. [2020-10-11 12:56:31,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:31,190 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:31,190 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:31,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:31,391 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:31,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:31,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1379734242, now seen corresponding path program 256 times [2020-10-11 12:56:31,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:31,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410289250] [2020-10-11 12:56:31,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:31,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410289250] [2020-10-11 12:56:31,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925223375] [2020-10-11 12:56:31,664 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 [2020-10-11 12:56:31,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:56:31,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:31,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:31,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:32,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:32,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:32,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765352684] [2020-10-11 12:56:32,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:32,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:32,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:32,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:32,222 INFO L87 Difference]: Start difference. First operand 342 states and 924 transitions. Second operand 19 states. [2020-10-11 12:56:33,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:33,344 INFO L93 Difference]: Finished difference Result 474 states and 1199 transitions. [2020-10-11 12:56:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:56:33,347 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:33,348 INFO L225 Difference]: With dead ends: 474 [2020-10-11 12:56:33,348 INFO L226 Difference]: Without dead ends: 468 [2020-10-11 12:56:33,349 INFO L673 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 [2020-10-11 12:56:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-11 12:56:33,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 340. [2020-10-11 12:56:33,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-11 12:56:33,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 918 transitions. [2020-10-11 12:56:33,354 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 918 transitions. Word has length 15 [2020-10-11 12:56:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:33,354 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 918 transitions. [2020-10-11 12:56:33,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:33,354 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 918 transitions. [2020-10-11 12:56:33,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:33,354 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:33,354 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:33,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2020-10-11 12:56:33,555 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:33,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:33,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1407411042, now seen corresponding path program 257 times [2020-10-11 12:56:33,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:33,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157141] [2020-10-11 12:56:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:33,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157141] [2020-10-11 12:56:33,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13491716] [2020-10-11 12:56:33,821 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 [2020-10-11 12:56:33,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:56:33,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:33,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:33,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:34,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:34,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:34,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605885049] [2020-10-11 12:56:34,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:34,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:34,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:34,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:56:34,528 INFO L87 Difference]: Start difference. First operand 340 states and 918 transitions. Second operand 19 states. [2020-10-11 12:56:35,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:35,982 INFO L93 Difference]: Finished difference Result 478 states and 1207 transitions. [2020-10-11 12:56:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:56:35,986 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:35,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:35,988 INFO L225 Difference]: With dead ends: 478 [2020-10-11 12:56:35,988 INFO L226 Difference]: Without dead ends: 472 [2020-10-11 12:56:35,988 INFO L673 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 [2020-10-11 12:56:35,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-10-11 12:56:35,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 340. [2020-10-11 12:56:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-11 12:56:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 918 transitions. [2020-10-11 12:56:35,993 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 918 transitions. Word has length 15 [2020-10-11 12:56:35,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:35,993 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 918 transitions. [2020-10-11 12:56:35,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:35,993 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 918 transitions. [2020-10-11 12:56:35,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:35,994 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:35,994 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:36,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2020-10-11 12:56:36,195 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:36,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:36,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1407439872, now seen corresponding path program 258 times [2020-10-11 12:56:36,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:36,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87158495] [2020-10-11 12:56:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:36,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87158495] [2020-10-11 12:56:36,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069033227] [2020-10-11 12:56:36,545 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 [2020-10-11 12:56:36,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:56:36,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:56:36,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:36,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:56:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:47,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:56:47,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:56:47,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404684571] [2020-10-11 12:56:47,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:56:47,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:56:47,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:56:47,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-11 12:56:47,392 INFO L87 Difference]: Start difference. First operand 340 states and 918 transitions. Second operand 19 states. [2020-10-11 12:56:51,937 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-11 12:56:56,274 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-11 12:56:58,954 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-11 12:56:59,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:56:59,369 INFO L93 Difference]: Finished difference Result 461 states and 1164 transitions. [2020-10-11 12:56:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:56:59,373 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:56:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:56:59,374 INFO L225 Difference]: With dead ends: 461 [2020-10-11 12:56:59,374 INFO L226 Difference]: Without dead ends: 456 [2020-10-11 12:56:59,375 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-11 12:56:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-11 12:56:59,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 338. [2020-10-11 12:56:59,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-11 12:56:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 912 transitions. [2020-10-11 12:56:59,380 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 912 transitions. Word has length 15 [2020-10-11 12:56:59,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:56:59,381 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 912 transitions. [2020-10-11 12:56:59,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:56:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 912 transitions. [2020-10-11 12:56:59,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:56:59,381 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:56:59,381 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:56:59,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:56:59,582 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:56:59,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:56:59,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1408364354, now seen corresponding path program 259 times [2020-10-11 12:56:59,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:56:59,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582038729] [2020-10-11 12:56:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:56:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:56:59,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582038729] [2020-10-11 12:56:59,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397863267] [2020-10-11 12:56:59,866 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 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 [2020-10-11 12:56:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:56:59,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:56:59,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:00,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:00,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:00,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897718318] [2020-10-11 12:57:00,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:00,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:00,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:00,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:00,335 INFO L87 Difference]: Start difference. First operand 338 states and 912 transitions. Second operand 19 states. [2020-10-11 12:57:01,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:01,250 INFO L93 Difference]: Finished difference Result 438 states and 1112 transitions. [2020-10-11 12:57:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:57:01,254 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:01,255 INFO L225 Difference]: With dead ends: 438 [2020-10-11 12:57:01,255 INFO L226 Difference]: Without dead ends: 417 [2020-10-11 12:57:01,256 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:57:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-11 12:57:01,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 339. [2020-10-11 12:57:01,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-11 12:57:01,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 907 transitions. [2020-10-11 12:57:01,261 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 907 transitions. Word has length 15 [2020-10-11 12:57:01,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:01,261 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 907 transitions. [2020-10-11 12:57:01,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 907 transitions. [2020-10-11 12:57:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:01,262 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:01,262 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:01,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:01,463 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:01,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:01,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2060879712, now seen corresponding path program 260 times [2020-10-11 12:57:01,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:01,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556392768] [2020-10-11 12:57:01,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:01,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556392768] [2020-10-11 12:57:01,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004311740] [2020-10-11 12:57:01,783 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 [2020-10-11 12:57:01,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:57:01,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:01,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:01,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:02,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:02,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:02,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438376479] [2020-10-11 12:57:02,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:02,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:02,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:02,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:02,248 INFO L87 Difference]: Start difference. First operand 339 states and 907 transitions. Second operand 19 states. [2020-10-11 12:57:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:03,097 INFO L93 Difference]: Finished difference Result 406 states and 1029 transitions. [2020-10-11 12:57:03,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 12:57:03,102 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:03,103 INFO L225 Difference]: With dead ends: 406 [2020-10-11 12:57:03,103 INFO L226 Difference]: Without dead ends: 403 [2020-10-11 12:57:03,104 INFO L673 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 [2020-10-11 12:57:03,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-11 12:57:03,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 345. [2020-10-11 12:57:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-11 12:57:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 923 transitions. [2020-10-11 12:57:03,108 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 923 transitions. Word has length 15 [2020-10-11 12:57:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:03,109 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 923 transitions. [2020-10-11 12:57:03,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 923 transitions. [2020-10-11 12:57:03,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:03,109 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:03,109 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:03,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:03,310 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:03,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:03,311 INFO L82 PathProgramCache]: Analyzing trace with hash -2060878751, now seen corresponding path program 261 times [2020-10-11 12:57:03,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:03,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566605490] [2020-10-11 12:57:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:03,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566605490] [2020-10-11 12:57:03,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907875887] [2020-10-11 12:57:03,668 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 [2020-10-11 12:57:03,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:57:03,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:03,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:03,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:04,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:04,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:04,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335771958] [2020-10-11 12:57:04,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:04,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:04,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:04,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:04,220 INFO L87 Difference]: Start difference. First operand 345 states and 923 transitions. Second operand 19 states. [2020-10-11 12:57:05,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:05,151 INFO L93 Difference]: Finished difference Result 436 states and 1098 transitions. [2020-10-11 12:57:05,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:57:05,156 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:05,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:05,158 INFO L225 Difference]: With dead ends: 436 [2020-10-11 12:57:05,158 INFO L226 Difference]: Without dead ends: 432 [2020-10-11 12:57:05,158 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:57:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-11 12:57:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 344. [2020-10-11 12:57:05,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-11 12:57:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 920 transitions. [2020-10-11 12:57:05,163 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 920 transitions. Word has length 15 [2020-10-11 12:57:05,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:05,163 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 920 transitions. [2020-10-11 12:57:05,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:05,163 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 920 transitions. [2020-10-11 12:57:05,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:05,164 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:05,164 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:05,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2020-10-11 12:57:05,365 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:05,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2060849921, now seen corresponding path program 262 times [2020-10-11 12:57:05,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:05,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847913851] [2020-10-11 12:57:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:05,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847913851] [2020-10-11 12:57:05,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677628638] [2020-10-11 12:57:05,699 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 [2020-10-11 12:57:05,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:57:05,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:05,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:06,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:06,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:06,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997514160] [2020-10-11 12:57:06,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:06,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:06,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:06,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:06,452 INFO L87 Difference]: Start difference. First operand 344 states and 920 transitions. Second operand 19 states. [2020-10-11 12:57:07,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:07,539 INFO L93 Difference]: Finished difference Result 452 states and 1133 transitions. [2020-10-11 12:57:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:57:07,543 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:07,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:07,544 INFO L225 Difference]: With dead ends: 452 [2020-10-11 12:57:07,544 INFO L226 Difference]: Without dead ends: 447 [2020-10-11 12:57:07,545 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-11 12:57:07,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-11 12:57:07,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 343. [2020-10-11 12:57:07,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-11 12:57:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 917 transitions. [2020-10-11 12:57:07,551 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 917 transitions. Word has length 15 [2020-10-11 12:57:07,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:07,551 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 917 transitions. [2020-10-11 12:57:07,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:07,551 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 917 transitions. [2020-10-11 12:57:07,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:07,552 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:07,552 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:07,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:07,753 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:07,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:07,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2059956191, now seen corresponding path program 263 times [2020-10-11 12:57:07,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:07,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925442566] [2020-10-11 12:57:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:08,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925442566] [2020-10-11 12:57:08,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404467786] [2020-10-11 12:57:08,083 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 [2020-10-11 12:57:08,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 12:57:08,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:08,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:08,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:08,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:08,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:08,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368042430] [2020-10-11 12:57:08,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:08,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:08,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:08,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:08,733 INFO L87 Difference]: Start difference. First operand 343 states and 917 transitions. Second operand 19 states. [2020-10-11 12:57:10,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:10,138 INFO L93 Difference]: Finished difference Result 451 states and 1130 transitions. [2020-10-11 12:57:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:57:10,141 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:10,142 INFO L225 Difference]: With dead ends: 451 [2020-10-11 12:57:10,142 INFO L226 Difference]: Without dead ends: 446 [2020-10-11 12:57:10,143 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:57:10,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-11 12:57:10,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 350. [2020-10-11 12:57:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-11 12:57:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 936 transitions. [2020-10-11 12:57:10,148 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 936 transitions. Word has length 15 [2020-10-11 12:57:10,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:10,148 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 936 transitions. [2020-10-11 12:57:10,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:10,149 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 936 transitions. [2020-10-11 12:57:10,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:10,149 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:10,149 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:10,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2020-10-11 12:57:10,350 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:10,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:10,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2059955230, now seen corresponding path program 264 times [2020-10-11 12:57:10,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:10,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689891161] [2020-10-11 12:57:10,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:10,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689891161] [2020-10-11 12:57:10,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613759633] [2020-10-11 12:57:10,679 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 [2020-10-11 12:57:10,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:57:10,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:10,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:10,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:17,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:17,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:17,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432447397] [2020-10-11 12:57:17,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:17,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:17,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:17,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-11 12:57:17,675 INFO L87 Difference]: Start difference. First operand 350 states and 936 transitions. Second operand 19 states. [2020-10-11 12:57:22,410 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-11 12:57:26,657 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-11 12:57:29,058 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-11 12:57:29,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:29,837 INFO L93 Difference]: Finished difference Result 481 states and 1200 transitions. [2020-10-11 12:57:29,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:57:29,842 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:29,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:29,843 INFO L225 Difference]: With dead ends: 481 [2020-10-11 12:57:29,843 INFO L226 Difference]: Without dead ends: 475 [2020-10-11 12:57:29,844 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-11 12:57:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-11 12:57:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 353. [2020-10-11 12:57:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-11 12:57:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 945 transitions. [2020-10-11 12:57:29,855 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 945 transitions. Word has length 15 [2020-10-11 12:57:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:29,855 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 945 transitions. [2020-10-11 12:57:29,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 945 transitions. [2020-10-11 12:57:29,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:29,855 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:29,855 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:30,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-10-11 12:57:30,056 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:30,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:30,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2059926400, now seen corresponding path program 265 times [2020-10-11 12:57:30,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:30,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288151498] [2020-10-11 12:57:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:30,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288151498] [2020-10-11 12:57:30,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614307429] [2020-10-11 12:57:30,422 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 [2020-10-11 12:57:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:30,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:30,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:31,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:31,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:31,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488566372] [2020-10-11 12:57:31,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:31,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:31,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:31,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:31,162 INFO L87 Difference]: Start difference. First operand 353 states and 945 transitions. Second operand 19 states. [2020-10-11 12:57:32,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:32,922 INFO L93 Difference]: Finished difference Result 482 states and 1207 transitions. [2020-10-11 12:57:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:57:32,926 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:32,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:32,928 INFO L225 Difference]: With dead ends: 482 [2020-10-11 12:57:32,928 INFO L226 Difference]: Without dead ends: 476 [2020-10-11 12:57:32,929 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 12:57:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-10-11 12:57:32,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 351. [2020-10-11 12:57:32,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-11 12:57:32,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 939 transitions. [2020-10-11 12:57:32,934 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 939 transitions. Word has length 15 [2020-10-11 12:57:32,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:32,934 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 939 transitions. [2020-10-11 12:57:32,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:32,935 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 939 transitions. [2020-10-11 12:57:32,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:32,935 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:32,935 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:33,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-10-11 12:57:33,136 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:33,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:33,136 INFO L82 PathProgramCache]: Analyzing trace with hash -2032250561, now seen corresponding path program 266 times [2020-10-11 12:57:33,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:33,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676861707] [2020-10-11 12:57:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:33,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676861707] [2020-10-11 12:57:33,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343248248] [2020-10-11 12:57:33,419 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 [2020-10-11 12:57:33,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:57:33,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:33,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:33,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:33,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:33,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:33,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065551069] [2020-10-11 12:57:33,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:33,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:33,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:33,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:33,976 INFO L87 Difference]: Start difference. First operand 351 states and 939 transitions. Second operand 19 states. [2020-10-11 12:57:35,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:35,136 INFO L93 Difference]: Finished difference Result 460 states and 1154 transitions. [2020-10-11 12:57:35,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:57:35,138 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:35,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:35,139 INFO L225 Difference]: With dead ends: 460 [2020-10-11 12:57:35,139 INFO L226 Difference]: Without dead ends: 455 [2020-10-11 12:57:35,139 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:57:35,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-11 12:57:35,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 356. [2020-10-11 12:57:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-11 12:57:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 952 transitions. [2020-10-11 12:57:35,144 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 952 transitions. Word has length 15 [2020-10-11 12:57:35,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:35,144 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 952 transitions. [2020-10-11 12:57:35,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:35,144 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 952 transitions. [2020-10-11 12:57:35,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:35,145 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:35,145 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:35,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-10-11 12:57:35,345 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:35,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:35,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2032220770, now seen corresponding path program 267 times [2020-10-11 12:57:35,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:35,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465006969] [2020-10-11 12:57:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:35,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465006969] [2020-10-11 12:57:35,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126604784] [2020-10-11 12:57:35,727 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 [2020-10-11 12:57:35,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:57:35,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:35,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:35,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:36,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:36,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:36,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387427060] [2020-10-11 12:57:36,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:36,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:36,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:36,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:36,275 INFO L87 Difference]: Start difference. First operand 356 states and 952 transitions. Second operand 19 states. [2020-10-11 12:57:37,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:37,265 INFO L93 Difference]: Finished difference Result 481 states and 1200 transitions. [2020-10-11 12:57:37,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:57:37,269 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:37,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:37,271 INFO L225 Difference]: With dead ends: 481 [2020-10-11 12:57:37,271 INFO L226 Difference]: Without dead ends: 475 [2020-10-11 12:57:37,271 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:57:37,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-11 12:57:37,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 354. [2020-10-11 12:57:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-11 12:57:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 946 transitions. [2020-10-11 12:57:37,276 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 946 transitions. Word has length 15 [2020-10-11 12:57:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:37,277 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 946 transitions. [2020-10-11 12:57:37,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:37,277 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 946 transitions. [2020-10-11 12:57:37,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:37,277 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:37,277 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:37,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2020-10-11 12:57:37,478 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:37,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:37,479 INFO L82 PathProgramCache]: Analyzing trace with hash -2031296288, now seen corresponding path program 268 times [2020-10-11 12:57:37,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:37,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432791663] [2020-10-11 12:57:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:37,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432791663] [2020-10-11 12:57:37,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756888377] [2020-10-11 12:57:37,857 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 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 [2020-10-11 12:57:37,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:57:37,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:37,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:37,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:38,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:38,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:38,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829944738] [2020-10-11 12:57:38,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:38,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:38,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:38,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:38,428 INFO L87 Difference]: Start difference. First operand 354 states and 946 transitions. Second operand 19 states. [2020-10-11 12:57:39,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:39,669 INFO L93 Difference]: Finished difference Result 442 states and 1116 transitions. [2020-10-11 12:57:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:57:39,673 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:39,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:39,675 INFO L225 Difference]: With dead ends: 442 [2020-10-11 12:57:39,675 INFO L226 Difference]: Without dead ends: 423 [2020-10-11 12:57:39,675 INFO L673 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 [2020-10-11 12:57:39,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-11 12:57:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 352. [2020-10-11 12:57:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-11 12:57:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 940 transitions. [2020-10-11 12:57:39,681 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 940 transitions. Word has length 15 [2020-10-11 12:57:39,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:39,681 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 940 transitions. [2020-10-11 12:57:39,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:39,681 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 940 transitions. [2020-10-11 12:57:39,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:39,682 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:39,682 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:39,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-10-11 12:57:39,883 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:39,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:39,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1173375070, now seen corresponding path program 269 times [2020-10-11 12:57:39,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:39,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137760765] [2020-10-11 12:57:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:40,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137760765] [2020-10-11 12:57:40,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291163942] [2020-10-11 12:57:40,328 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 [2020-10-11 12:57:40,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 12:57:40,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:40,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:40,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:41,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:41,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:41,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886917506] [2020-10-11 12:57:41,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:41,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:41,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:41,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:41,191 INFO L87 Difference]: Start difference. First operand 352 states and 940 transitions. Second operand 19 states. [2020-10-11 12:57:41,478 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-11 12:57:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:42,532 INFO L93 Difference]: Finished difference Result 456 states and 1147 transitions. [2020-10-11 12:57:42,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 12:57:42,536 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:42,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:42,537 INFO L225 Difference]: With dead ends: 456 [2020-10-11 12:57:42,537 INFO L226 Difference]: Without dead ends: 450 [2020-10-11 12:57:42,537 INFO L673 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 [2020-10-11 12:57:42,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-11 12:57:42,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 350. [2020-10-11 12:57:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-11 12:57:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 934 transitions. [2020-10-11 12:57:42,543 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 934 transitions. Word has length 15 [2020-10-11 12:57:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:42,544 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 934 transitions. [2020-10-11 12:57:42,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 934 transitions. [2020-10-11 12:57:42,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:42,544 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:42,544 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:42,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2020-10-11 12:57:42,745 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:42,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:42,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1173345279, now seen corresponding path program 270 times [2020-10-11 12:57:42,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:42,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212500459] [2020-10-11 12:57:42,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:43,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212500459] [2020-10-11 12:57:43,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115127643] [2020-10-11 12:57:43,103 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 [2020-10-11 12:57:43,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 12:57:43,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:43,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:43,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:47,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:47,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:47,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490092097] [2020-10-11 12:57:47,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:47,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:47,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:47,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:47,996 INFO L87 Difference]: Start difference. First operand 350 states and 934 transitions. Second operand 19 states. [2020-10-11 12:57:48,247 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-11 12:57:49,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:49,570 INFO L93 Difference]: Finished difference Result 466 states and 1163 transitions. [2020-10-11 12:57:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 12:57:49,574 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:49,575 INFO L225 Difference]: With dead ends: 466 [2020-10-11 12:57:49,575 INFO L226 Difference]: Without dead ends: 446 [2020-10-11 12:57:49,576 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=291, Invalid=579, Unknown=0, NotChecked=0, Total=870 [2020-10-11 12:57:49,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-11 12:57:49,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 345. [2020-10-11 12:57:49,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-11 12:57:49,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 919 transitions. [2020-10-11 12:57:49,581 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 919 transitions. Word has length 15 [2020-10-11 12:57:49,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:49,581 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 919 transitions. [2020-10-11 12:57:49,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:49,581 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 919 transitions. [2020-10-11 12:57:49,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:49,581 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:49,581 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:49,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:49,782 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:49,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:49,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1143823359, now seen corresponding path program 271 times [2020-10-11 12:57:49,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:49,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387118989] [2020-10-11 12:57:49,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:50,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387118989] [2020-10-11 12:57:50,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493097176] [2020-10-11 12:57:50,165 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 [2020-10-11 12:57:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:50,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:50,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:50,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:50,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:50,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524958945] [2020-10-11 12:57:50,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:50,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:50,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:50,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:50,829 INFO L87 Difference]: Start difference. First operand 345 states and 919 transitions. Second operand 19 states. [2020-10-11 12:57:51,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:51,699 INFO L93 Difference]: Finished difference Result 437 states and 1106 transitions. [2020-10-11 12:57:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:57:51,704 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:51,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:51,705 INFO L225 Difference]: With dead ends: 437 [2020-10-11 12:57:51,705 INFO L226 Difference]: Without dead ends: 422 [2020-10-11 12:57:51,705 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=214, Invalid=436, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:57:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-11 12:57:51,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 350. [2020-10-11 12:57:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-11 12:57:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 928 transitions. [2020-10-11 12:57:51,712 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 928 transitions. Word has length 15 [2020-10-11 12:57:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:51,713 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 928 transitions. [2020-10-11 12:57:51,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:51,713 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 928 transitions. [2020-10-11 12:57:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:51,714 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:51,714 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:51,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2020-10-11 12:57:51,929 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:51,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:51,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1143822398, now seen corresponding path program 272 times [2020-10-11 12:57:51,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:51,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335468724] [2020-10-11 12:57:51,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:52,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335468724] [2020-10-11 12:57:52,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615749445] [2020-10-11 12:57:52,377 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 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 [2020-10-11 12:57:52,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:57:52,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:52,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:52,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:53,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:53,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:53,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295017385] [2020-10-11 12:57:53,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:53,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:53,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:53,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:53,124 INFO L87 Difference]: Start difference. First operand 350 states and 928 transitions. Second operand 19 states. [2020-10-11 12:57:54,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:54,206 INFO L93 Difference]: Finished difference Result 433 states and 1087 transitions. [2020-10-11 12:57:54,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 12:57:54,210 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:54,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:54,211 INFO L225 Difference]: With dead ends: 433 [2020-10-11 12:57:54,211 INFO L226 Difference]: Without dead ends: 417 [2020-10-11 12:57:54,211 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:57:54,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-11 12:57:54,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 349. [2020-10-11 12:57:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-11 12:57:54,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 925 transitions. [2020-10-11 12:57:54,216 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 925 transitions. Word has length 15 [2020-10-11 12:57:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:54,217 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 925 transitions. [2020-10-11 12:57:54,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:54,217 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 925 transitions. [2020-10-11 12:57:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:54,217 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:54,217 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:54,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:54,418 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:54,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:54,419 INFO L82 PathProgramCache]: Analyzing trace with hash 439565519, now seen corresponding path program 273 times [2020-10-11 12:57:54,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:54,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954246778] [2020-10-11 12:57:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:55,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954246778] [2020-10-11 12:57:55,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753290176] [2020-10-11 12:57:55,004 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 [2020-10-11 12:57:55,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 12:57:55,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:55,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:55,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:55,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:55,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:55,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935023783] [2020-10-11 12:57:55,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:55,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:55,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:55,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:55,587 INFO L87 Difference]: Start difference. First operand 349 states and 925 transitions. Second operand 19 states. [2020-10-11 12:57:55,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:55,821 INFO L93 Difference]: Finished difference Result 394 states and 1001 transitions. [2020-10-11 12:57:55,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 12:57:55,825 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:55,826 INFO L225 Difference]: With dead ends: 394 [2020-10-11 12:57:55,826 INFO L226 Difference]: Without dead ends: 392 [2020-10-11 12:57:55,827 INFO L673 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 [2020-10-11 12:57:55,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-11 12:57:55,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 357. [2020-10-11 12:57:55,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-11 12:57:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 949 transitions. [2020-10-11 12:57:55,837 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 949 transitions. Word has length 15 [2020-10-11 12:57:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:55,837 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 949 transitions. [2020-10-11 12:57:55,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 949 transitions. [2020-10-11 12:57:55,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:55,837 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:55,838 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:56,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:56,038 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:56,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:56,039 INFO L82 PathProgramCache]: Analyzing trace with hash 439566480, now seen corresponding path program 274 times [2020-10-11 12:57:56,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:56,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746483524] [2020-10-11 12:57:56,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:56,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746483524] [2020-10-11 12:57:56,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503580341] [2020-10-11 12:57:56,585 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 [2020-10-11 12:57:56,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:57:56,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:56,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:56,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:57,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:57,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:57,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378759481] [2020-10-11 12:57:57,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:57,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:57,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:57,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:57,226 INFO L87 Difference]: Start difference. First operand 357 states and 949 transitions. Second operand 19 states. [2020-10-11 12:57:57,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:57:57,944 INFO L93 Difference]: Finished difference Result 420 states and 1064 transitions. [2020-10-11 12:57:57,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:57:57,949 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:57:57,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:57:57,950 INFO L225 Difference]: With dead ends: 420 [2020-10-11 12:57:57,951 INFO L226 Difference]: Without dead ends: 417 [2020-10-11 12:57:57,951 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-10-11 12:57:57,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-11 12:57:57,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 355. [2020-10-11 12:57:57,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-11 12:57:57,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-11 12:57:57,956 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-11 12:57:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:57:57,956 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-11 12:57:57,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:57:57,957 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-11 12:57:57,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:57:57,957 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:57:57,957 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:57:58,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:57:58,159 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:57:58,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:57:58,160 INFO L82 PathProgramCache]: Analyzing trace with hash 439595310, now seen corresponding path program 275 times [2020-10-11 12:57:58,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:57:58,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788952961] [2020-10-11 12:57:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:57:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:57:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:58,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788952961] [2020-10-11 12:57:58,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263235490] [2020-10-11 12:57:58,675 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 [2020-10-11 12:57:58,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:57:58,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:57:58,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:57:58,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:57:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:57:59,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:57:59,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:57:59,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370787864] [2020-10-11 12:57:59,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:57:59,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:57:59,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:57:59,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:57:59,508 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-11 12:58:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:00,671 INFO L93 Difference]: Finished difference Result 452 states and 1140 transitions. [2020-10-11 12:58:00,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 12:58:00,676 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:00,678 INFO L225 Difference]: With dead ends: 452 [2020-10-11 12:58:00,678 INFO L226 Difference]: Without dead ends: 448 [2020-10-11 12:58:00,678 INFO L673 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 [2020-10-11 12:58:00,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-10-11 12:58:00,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 353. [2020-10-11 12:58:00,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-11 12:58:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 937 transitions. [2020-10-11 12:58:00,683 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 937 transitions. Word has length 15 [2020-10-11 12:58:00,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:00,683 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 937 transitions. [2020-10-11 12:58:00,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:00,683 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 937 transitions. [2020-10-11 12:58:00,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:00,684 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:00,684 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:00,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-10-11 12:58:00,885 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:00,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:00,885 INFO L82 PathProgramCache]: Analyzing trace with hash 440489040, now seen corresponding path program 276 times [2020-10-11 12:58:00,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:00,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908677087] [2020-10-11 12:58:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:01,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908677087] [2020-10-11 12:58:01,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024096777] [2020-10-11 12:58:01,321 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 [2020-10-11 12:58:01,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 12:58:01,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:58:01,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:01,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:08,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:08,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:58:08,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433472207] [2020-10-11 12:58:08,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:58:08,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:08,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:58:08,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:58:08,010 INFO L87 Difference]: Start difference. First operand 353 states and 937 transitions. Second operand 19 states. [2020-10-11 12:58:09,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:09,490 INFO L93 Difference]: Finished difference Result 446 states and 1118 transitions. [2020-10-11 12:58:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 12:58:09,492 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:09,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:09,493 INFO L225 Difference]: With dead ends: 446 [2020-10-11 12:58:09,493 INFO L226 Difference]: Without dead ends: 443 [2020-10-11 12:58:09,493 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:58:09,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-11 12:58:09,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 355. [2020-10-11 12:58:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-11 12:58:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-11 12:58:09,498 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-11 12:58:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:09,498 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-11 12:58:09,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-11 12:58:09,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:09,499 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:09,499 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:09,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-10-11 12:58:09,700 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:09,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:09,700 INFO L82 PathProgramCache]: Analyzing trace with hash 440490001, now seen corresponding path program 277 times [2020-10-11 12:58:09,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:09,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961368371] [2020-10-11 12:58:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:10,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961368371] [2020-10-11 12:58:10,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327041059] [2020-10-11 12:58:10,152 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 [2020-10-11 12:58:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:10,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:10,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:13,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:13,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:58:13,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087354599] [2020-10-11 12:58:13,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:58:13,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:13,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:58:13,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=251, Unknown=1, NotChecked=0, Total=342 [2020-10-11 12:58:13,359 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-11 12:58:17,932 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-11 12:58:19,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:19,104 INFO L93 Difference]: Finished difference Result 483 states and 1210 transitions. [2020-10-11 12:58:19,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:58:19,109 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:19,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:19,110 INFO L225 Difference]: With dead ends: 483 [2020-10-11 12:58:19,110 INFO L226 Difference]: Without dead ends: 478 [2020-10-11 12:58:19,110 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=256, Invalid=555, Unknown=1, NotChecked=0, Total=812 [2020-10-11 12:58:19,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-11 12:58:19,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 355. [2020-10-11 12:58:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-11 12:58:19,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-11 12:58:19,121 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-11 12:58:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:19,121 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-11 12:58:19,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-11 12:58:19,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:19,122 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:19,122 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:19,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-10-11 12:58:19,322 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:19,323 INFO L82 PathProgramCache]: Analyzing trace with hash 440518831, now seen corresponding path program 278 times [2020-10-11 12:58:19,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:19,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884364175] [2020-10-11 12:58:19,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:19,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884364175] [2020-10-11 12:58:19,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224991377] [2020-10-11 12:58:19,684 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 [2020-10-11 12:58:19,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 12:58:19,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:58:19,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:19,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:20,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:20,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:58:20,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079118742] [2020-10-11 12:58:20,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:58:20,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:20,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:58:20,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:58:20,509 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-11 12:58:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:22,038 INFO L93 Difference]: Finished difference Result 469 states and 1175 transitions. [2020-10-11 12:58:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 12:58:22,043 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:22,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:22,044 INFO L225 Difference]: With dead ends: 469 [2020-10-11 12:58:22,044 INFO L226 Difference]: Without dead ends: 465 [2020-10-11 12:58:22,044 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-11 12:58:22,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-11 12:58:22,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 351. [2020-10-11 12:58:22,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-11 12:58:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 931 transitions. [2020-10-11 12:58:22,050 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 931 transitions. Word has length 15 [2020-10-11 12:58:22,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:22,050 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 931 transitions. [2020-10-11 12:58:22,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:22,050 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 931 transitions. [2020-10-11 12:58:22,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:22,050 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:22,050 INFO L421 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:22,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-10-11 12:58:22,251 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:22,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:22,252 INFO L82 PathProgramCache]: Analyzing trace with hash 468194670, now seen corresponding path program 279 times [2020-10-11 12:58:22,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:22,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619450959] [2020-10-11 12:58:22,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:22,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619450959] [2020-10-11 12:58:22,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922733995] [2020-10-11 12:58:22,661 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 [2020-10-11 12:58:22,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 12:58:22,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:58:22,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:22,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:27,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:27,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:58:27,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456224412] [2020-10-11 12:58:27,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:58:27,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:27,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:58:27,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:58:27,386 INFO L87 Difference]: Start difference. First operand 351 states and 931 transitions. Second operand 19 states. [2020-10-11 12:58:28,646 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-10-11 12:58:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:29,355 INFO L93 Difference]: Finished difference Result 440 states and 1101 transitions. [2020-10-11 12:58:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:58:29,360 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:29,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:29,361 INFO L225 Difference]: With dead ends: 440 [2020-10-11 12:58:29,362 INFO L226 Difference]: Without dead ends: 437 [2020-10-11 12:58:29,362 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=312, Invalid=680, Unknown=0, NotChecked=0, Total=992 [2020-10-11 12:58:29,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-11 12:58:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 354. [2020-10-11 12:58:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-11 12:58:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 940 transitions. [2020-10-11 12:58:29,368 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 940 transitions. Word has length 15 [2020-10-11 12:58:29,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:29,368 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 940 transitions. [2020-10-11 12:58:29,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:29,369 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 940 transitions. [2020-10-11 12:58:29,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:29,369 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:29,369 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:29,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 12:58:29,571 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:29,572 INFO L82 PathProgramCache]: Analyzing trace with hash 468195631, now seen corresponding path program 280 times [2020-10-11 12:58:29,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:29,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055215511] [2020-10-11 12:58:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:29,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055215511] [2020-10-11 12:58:29,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912971951] [2020-10-11 12:58:29,894 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 [2020-10-11 12:58:29,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 12:58:29,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:58:29,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:29,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:30,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:30,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:58:30,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844844378] [2020-10-11 12:58:30,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:58:30,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:30,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:58:30,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-11 12:58:30,673 INFO L87 Difference]: Start difference. First operand 354 states and 940 transitions. Second operand 19 states. [2020-10-11 12:58:31,938 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-11 12:58:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 12:58:32,564 INFO L93 Difference]: Finished difference Result 478 states and 1194 transitions. [2020-10-11 12:58:32,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:58:32,569 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-11 12:58:32,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 12:58:32,570 INFO L225 Difference]: With dead ends: 478 [2020-10-11 12:58:32,570 INFO L226 Difference]: Without dead ends: 473 [2020-10-11 12:58:32,570 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2020-10-11 12:58:32,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-10-11 12:58:32,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 354. [2020-10-11 12:58:32,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-11 12:58:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 940 transitions. [2020-10-11 12:58:32,578 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 940 transitions. Word has length 15 [2020-10-11 12:58:32,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 12:58:32,578 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 940 transitions. [2020-10-11 12:58:32,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 12:58:32,579 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 940 transitions. [2020-10-11 12:58:32,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 12:58:32,579 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 12:58:32,579 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 12:58:32,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-10-11 12:58:32,792 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 12:58:32,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 12:58:32,792 INFO L82 PathProgramCache]: Analyzing trace with hash 468224461, now seen corresponding path program 281 times [2020-10-11 12:58:32,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 12:58:32,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687749237] [2020-10-11 12:58:32,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 12:58:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 12:58:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:33,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687749237] [2020-10-11 12:58:33,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530693839] [2020-10-11 12:58:33,214 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 [2020-10-11 12:58:33,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 12:58:33,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 12:58:33,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 12:58:33,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 12:58:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 12:58:45,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 12:58:45,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-11 12:58:45,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864421441] [2020-10-11 12:58:45,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 12:58:45,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 12:58:45,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 12:58:45,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=252, Unknown=1, NotChecked=0, Total=342 [2020-10-11 12:58:45,679 INFO L87 Difference]: Start difference. First operand 354 states and 940 transitions. Second operand 19 states. [2020-10-11 12:58:50,127 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-11 12:58:53,608 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 Received shutdown request... [2020-10-11 12:58:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 12:58:56,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-10-11 12:58:56,134 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-11 12:58:56,140 WARN L235 ceAbstractionStarter]: Timeout [2020-10-11 12:58:56,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:58:56 BasicIcfg [2020-10-11 12:58:56,140 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 12:58:56,141 INFO L168 Benchmark]: Toolchain (without parser) took 875541.07 ms. Allocated memory was 245.9 MB in the beginning and 208.1 MB in the end (delta: -37.7 MB). Free memory was 199.3 MB in the beginning and 131.3 MB in the end (delta: 68.0 MB). Peak memory consumption was 30.3 MB. Max. memory is 14.2 GB. [2020-10-11 12:58:56,141 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 245.9 MB. Free memory is still 219.8 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 12:58:56,141 INFO L168 Benchmark]: CACSL2BoogieTranslator took 802.81 ms. Allocated memory was 245.9 MB in the beginning and 297.3 MB in the end (delta: 51.4 MB). Free memory was 199.3 MB in the beginning and 250.6 MB in the end (delta: -51.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 14.2 GB. [2020-10-11 12:58:56,142 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.07 ms. Allocated memory is still 297.3 MB. Free memory was 250.6 MB in the beginning and 248.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 12:58:56,142 INFO L168 Benchmark]: Boogie Preprocessor took 26.76 ms. Allocated memory is still 297.3 MB. Free memory was 248.1 MB in the beginning and 245.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 12:58:56,142 INFO L168 Benchmark]: RCFGBuilder took 509.44 ms. Allocated memory is still 297.3 MB. Free memory was 245.6 MB in the beginning and 226.3 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. [2020-10-11 12:58:56,142 INFO L168 Benchmark]: TraceAbstraction took 874140.37 ms. Allocated memory was 297.3 MB in the beginning and 208.1 MB in the end (delta: -89.1 MB). Free memory was 226.3 MB in the beginning and 131.3 MB in the end (delta: 95.0 MB). Peak memory consumption was 5.8 MB. Max. memory is 14.2 GB. [2020-10-11 12:58:56,145 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 245.9 MB. Free memory is still 219.8 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 802.81 ms. Allocated memory was 245.9 MB in the beginning and 297.3 MB in the end (delta: 51.4 MB). Free memory was 199.3 MB in the beginning and 250.6 MB in the end (delta: -51.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 54.07 ms. Allocated memory is still 297.3 MB. Free memory was 250.6 MB in the beginning and 248.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.76 ms. Allocated memory is still 297.3 MB. Free memory was 248.1 MB in the beginning and 245.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 509.44 ms. Allocated memory is still 297.3 MB. Free memory was 245.6 MB in the beginning and 226.3 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 874140.37 ms. Allocated memory was 297.3 MB in the beginning and 208.1 MB in the end (delta: -89.1 MB). Free memory was 226.3 MB in the beginning and 131.3 MB in the end (delta: 95.0 MB). Peak memory consumption was 5.8 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 constructing difference of abstraction (354states) and FLOYD_HOARE automaton (currently 21 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (203 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 874.0s, OverallIterations: 317, TraceHistogramMax: 7, AutomataDifference: 527.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 4179 SDtfs, 37191 SDslu, 32744 SDs, 0 SdLazy, 23386 SolverSat, 9862 SolverUnsat, 63 SolverUnknown, 0 SolverNotchecked, 156.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9350 GetRequests, 1539 SyntacticMatches, 286 SemanticMatches, 7525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51463 ImplicationChecksByTransitivity, 601.2s 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, 264.1s InterpolantComputationTime, 8308 NumberOfCodeBlocks, 8306 NumberOfCodeBlocksAsserted, 1006 NumberOfCheckSat, 7682 ConstructedInterpolants, 51 QuantifiedInterpolants, 892556 SizeOfPredicates, 307 NumberOfNonLiveVariables, 27976 ConjunctsInSsa, 3218 ConjunctsInUnsatCore, 626 InterpolantComputations, 10 PerfectInterpolantSequences, 42/3966 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