/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 10:46:39,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 10:46:39,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 10:46:39,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 10:46:39,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 10:46:39,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 10:46:39,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 10:46:39,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 10:46:39,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 10:46:39,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 10:46:39,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 10:46:39,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 10:46:39,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 10:46:39,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 10:46:39,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 10:46:39,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 10:46:39,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 10:46:39,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 10:46:39,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 10:46:39,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 10:46:39,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 10:46:39,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 10:46:39,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 10:46:39,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 10:46:39,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 10:46:39,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 10:46:39,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 10:46:39,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 10:46:39,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 10:46:39,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 10:46:39,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 10:46:39,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 10:46:39,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 10:46:39,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 10:46:39,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 10:46:39,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 10:46:39,408 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 10:46:39,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 10:46:39,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 10:46:39,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 10:46:39,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 10:46:39,411 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-16 10:46:39,434 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 10:46:39,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 10:46:39,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 10:46:39,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 10:46:39,436 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 10:46:39,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 10:46:39,436 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 10:46:39,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 10:46:39,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 10:46:39,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 10:46:39,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 10:46:39,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 10:46:39,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 10:46:39,437 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 10:46:39,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 10:46:39,438 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 10:46:39,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 10:46:39,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 10:46:39,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 10:46:39,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 10:46:39,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 10:46:39,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 10:46:39,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 10:46:39,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 10:46:39,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 10:46:39,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 10:46:39,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 10:46:39,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 10:46:39,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-16 10:46:39,440 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 10:46:39,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 10:46:39,775 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 10:46:39,779 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 10:46:39,780 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 10:46:39,780 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 10:46:39,781 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2020-10-16 10:46:39,854 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a74a0892/e300a15bb1c54d859434fd6827689a61/FLAG4091cdfe3 [2020-10-16 10:46:40,426 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 10:46:40,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/fib_bench-1.i [2020-10-16 10:46:40,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a74a0892/e300a15bb1c54d859434fd6827689a61/FLAG4091cdfe3 [2020-10-16 10:46:40,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a74a0892/e300a15bb1c54d859434fd6827689a61 [2020-10-16 10:46:40,661 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 10:46:40,667 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 10:46:40,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 10:46:40,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 10:46:40,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 10:46:40,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 10:46:40" (1/1) ... [2020-10-16 10:46:40,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fee64f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:40, skipping insertion in model container [2020-10-16 10:46:40,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 10:46:40" (1/1) ... [2020-10-16 10:46:40,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 10:46:40,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 10:46:41,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 10:46:41,239 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 10:46:41,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 10:46:41,381 INFO L208 MainTranslator]: Completed translation [2020-10-16 10:46:41,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41 WrapperNode [2020-10-16 10:46:41,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 10:46:41,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 10:46:41,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 10:46:41,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 10:46:41,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 10:46:41,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 10:46:41,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 10:46:41,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 10:46:41,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... [2020-10-16 10:46:41,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 10:46:41,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 10:46:41,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 10:46:41,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 10:46:41,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:41,562 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 10:46:41,562 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 10:46:41,562 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 10:46:41,562 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 10:46:41,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 10:46:41,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 10:46:41,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 10:46:41,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 10:46:41,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 10:46:41,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 10:46:41,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 10:46:41,565 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 10:46:41,966 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 10:46:41,967 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 10:46:41,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 10:46:41 BoogieIcfgContainer [2020-10-16 10:46:41,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 10:46:41,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 10:46:41,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 10:46:41,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 10:46:41,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 10:46:40" (1/3) ... [2020-10-16 10:46:41,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25823f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 10:46:41, skipping insertion in model container [2020-10-16 10:46:41,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:46:41" (2/3) ... [2020-10-16 10:46:41,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25823f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 10:46:41, skipping insertion in model container [2020-10-16 10:46:41,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 10:46:41" (3/3) ... [2020-10-16 10:46:41,989 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2020-10-16 10:46:41,998 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 10:46:41,998 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 10:46:42,005 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 10:46:42,006 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 10:46:42,031 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,031 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,032 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,032 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,033 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,033 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,033 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,034 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,034 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,034 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,035 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,035 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,035 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,035 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,036 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,036 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,036 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,037 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,037 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,037 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,038 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,038 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,038 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,039 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,039 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,039 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,040 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,040 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,040 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,040 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,044 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,044 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,044 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,045 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,045 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,045 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,051 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,051 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,051 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,051 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,052 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,052 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:46:42,055 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 10:46:42,066 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 10:46:42,085 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 10:46:42,085 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 10:46:42,085 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 10:46:42,085 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 10:46:42,086 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 10:46:42,086 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 10:46:42,086 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 10:46:42,086 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 10:46:42,097 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 10:46:42,100 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-16 10:46:42,103 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-16 10:46:42,105 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-16 10:46:42,144 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-16 10:46:42,145 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 10:46:42,150 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. [2020-10-16 10:46:42,153 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-16 10:46:43,225 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-16 10:46:43,320 INFO L132 LiptonReduction]: Checked pairs total: 943 [2020-10-16 10:46:43,320 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-16 10:46:43,328 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-16 10:46:43,342 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 10:46:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 10:46:43,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 10:46:43,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:43,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 10:46:43,354 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:43,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:43,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-16 10:46:43,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:43,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368350094] [2020-10-16 10:46:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:43,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368350094] [2020-10-16 10:46:43,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:43,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 10:46:43,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158626796] [2020-10-16 10:46:43,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 10:46:43,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:43,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 10:46:43,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 10:46:43,664 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 10:46:43,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:43,739 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-16 10:46:43,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 10:46:43,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 10:46:43,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:43,753 INFO L225 Difference]: With dead ends: 83 [2020-10-16 10:46:43,754 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 10:46:43,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:46:43,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 10:46:43,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-16 10:46:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:46:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-16 10:46:43,804 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-16 10:46:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:43,804 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-16 10:46:43,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 10:46:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-16 10:46:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 10:46:43,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:43,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:43,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 10:46:43,806 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:43,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:43,807 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-16 10:46:43,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:43,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663632642] [2020-10-16 10:46:43,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:43,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663632642] [2020-10-16 10:46:43,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:43,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 10:46:43,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360908708] [2020-10-16 10:46:43,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 10:46:43,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:43,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 10:46:43,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:46:43,908 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-16 10:46:43,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:43,961 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-16 10:46:43,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:43,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 10:46:43,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:43,964 INFO L225 Difference]: With dead ends: 80 [2020-10-16 10:46:43,964 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 10:46:43,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 10:46:43,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 10:46:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-16 10:46:43,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 10:46:43,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-16 10:46:43,975 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-16 10:46:43,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:43,976 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-16 10:46:43,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 10:46:43,977 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-16 10:46:43,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 10:46:43,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:43,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:43,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 10:46:43,978 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:43,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:43,979 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-16 10:46:43,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:43,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705833070] [2020-10-16 10:46:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:44,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705833070] [2020-10-16 10:46:44,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:44,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 10:46:44,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241123547] [2020-10-16 10:46:44,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 10:46:44,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:44,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 10:46:44,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:46:44,053 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-16 10:46:44,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:44,079 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-16 10:46:44,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 10:46:44,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 10:46:44,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:44,081 INFO L225 Difference]: With dead ends: 73 [2020-10-16 10:46:44,082 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 10:46:44,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:46:44,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 10:46:44,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-16 10:46:44,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:46:44,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-16 10:46:44,091 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-16 10:46:44,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:44,091 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-16 10:46:44,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 10:46:44,092 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-16 10:46:44,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 10:46:44,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:44,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:44,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 10:46:44,093 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:44,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:44,094 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-16 10:46:44,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:44,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321475387] [2020-10-16 10:46:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:44,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321475387] [2020-10-16 10:46:44,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:44,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 10:46:44,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976405297] [2020-10-16 10:46:44,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 10:46:44,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:44,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 10:46:44,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:46:44,151 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-16 10:46:44,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:44,209 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-16 10:46:44,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:44,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 10:46:44,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:44,211 INFO L225 Difference]: With dead ends: 86 [2020-10-16 10:46:44,211 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 10:46:44,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 10:46:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 10:46:44,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-16 10:46:44,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:46:44,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-16 10:46:44,220 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-16 10:46:44,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:44,221 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-16 10:46:44,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 10:46:44,221 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-16 10:46:44,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 10:46:44,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:44,222 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:44,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 10:46:44,223 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:44,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:44,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-16 10:46:44,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:44,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533210380] [2020-10-16 10:46:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:44,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533210380] [2020-10-16 10:46:44,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742092044] [2020-10-16 10:46:44,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:44,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:44,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:44,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:46:44,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:44,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:44,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:44,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-16 10:46:44,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035610721] [2020-10-16 10:46:44,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:46:44,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:44,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:46:44,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:46:44,471 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-16 10:46:44,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:44,543 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-16 10:46:44,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:44,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-16 10:46:44,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:44,545 INFO L225 Difference]: With dead ends: 101 [2020-10-16 10:46:44,545 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 10:46:44,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:44,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 10:46:44,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-16 10:46:44,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 10:46:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-16 10:46:44,553 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-16 10:46:44,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:44,554 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-16 10:46:44,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:46:44,554 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-16 10:46:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 10:46:44,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:44,555 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:44,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:44,758 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:44,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:44,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-16 10:46:44,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:44,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157917641] [2020-10-16 10:46:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:44,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157917641] [2020-10-16 10:46:44,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890049469] [2020-10-16 10:46:44,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:44,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:46:44,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:44,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:46:44,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:45,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 10:46:45,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677146325] [2020-10-16 10:46:45,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:46:45,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:45,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:46:45,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:45,027 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-16 10:46:45,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:45,071 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-16 10:46:45,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 10:46:45,072 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 10:46:45,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:45,073 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:46:45,073 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 10:46:45,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:45,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 10:46:45,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-16 10:46:45,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:46:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-16 10:46:45,081 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-16 10:46:45,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:45,081 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-16 10:46:45,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:46:45,082 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-16 10:46:45,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 10:46:45,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:45,083 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:45,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:45,298 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:45,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:45,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-16 10:46:45,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:45,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812848583] [2020-10-16 10:46:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812848583] [2020-10-16 10:46:45,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105257617] [2020-10-16 10:46:45,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:45,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:46:45,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:45,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:46:45,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:45,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 10:46:45,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321511454] [2020-10-16 10:46:45,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:46:45,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:45,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:46:45,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:45,518 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-16 10:46:45,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:45,571 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-16 10:46:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:45,571 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 10:46:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:45,572 INFO L225 Difference]: With dead ends: 90 [2020-10-16 10:46:45,572 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 10:46:45,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:46:45,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 10:46:45,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-16 10:46:45,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:46:45,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-16 10:46:45,579 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-16 10:46:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:45,580 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-16 10:46:45,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:46:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-16 10:46:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 10:46:45,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:45,581 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:45,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:45,782 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:45,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-16 10:46:45,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:45,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040613349] [2020-10-16 10:46:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040613349] [2020-10-16 10:46:45,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917369405] [2020-10-16 10:46:45,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:45,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:45,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:45,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:46:45,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:45,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:46:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:45,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:45,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 10:46:45,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377960829] [2020-10-16 10:46:45,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:46:45,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:45,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:46:45,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:46,000 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-16 10:46:46,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:46,111 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-16 10:46:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:46,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 10:46:46,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:46,112 INFO L225 Difference]: With dead ends: 99 [2020-10-16 10:46:46,113 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:46:46,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:46:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:46:46,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-16 10:46:46,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 10:46:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-16 10:46:46,123 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-16 10:46:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:46,124 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-16 10:46:46,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:46:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-16 10:46:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:46,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:46,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:46,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:46,340 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:46,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:46,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-16 10:46:46,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:46,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187500191] [2020-10-16 10:46:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:46,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187500191] [2020-10-16 10:46:46,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:46,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:46:46,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020510744] [2020-10-16 10:46:46,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:46:46,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:46,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:46:46,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:46:46,425 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-16 10:46:46,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:46,465 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-16 10:46:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 10:46:46,465 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:46:46,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:46,467 INFO L225 Difference]: With dead ends: 92 [2020-10-16 10:46:46,467 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 10:46:46,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:46:46,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 10:46:46,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-16 10:46:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 10:46:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-16 10:46:46,477 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-16 10:46:46,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:46,478 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-16 10:46:46,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:46:46,478 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-16 10:46:46,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:46,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:46,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:46,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 10:46:46,485 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:46,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-16 10:46:46,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:46,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979628116] [2020-10-16 10:46:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:46,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979628116] [2020-10-16 10:46:46,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:46,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:46:46,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427572711] [2020-10-16 10:46:46,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:46:46,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:46,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:46:46,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:46:46,548 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-16 10:46:46,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:46,594 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-16 10:46:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:46,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:46:46,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:46,596 INFO L225 Difference]: With dead ends: 100 [2020-10-16 10:46:46,596 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:46:46,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 10:46:46,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:46:46,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-16 10:46:46,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 10:46:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-16 10:46:46,604 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-16 10:46:46,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:46,604 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-16 10:46:46,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:46:46,605 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-16 10:46:46,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:46,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:46,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:46,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-16 10:46:46,606 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:46,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-16 10:46:46,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:46,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133996774] [2020-10-16 10:46:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:46,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133996774] [2020-10-16 10:46:46,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:46,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:46:46,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692464619] [2020-10-16 10:46:46,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:46:46,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:46,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:46:46,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:46:46,663 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-16 10:46:46,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:46,732 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 10:46:46,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:46,732 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:46:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:46,733 INFO L225 Difference]: With dead ends: 105 [2020-10-16 10:46:46,734 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 10:46:46,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 10:46:46,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-16 10:46:46,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:46:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-16 10:46:46,739 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-16 10:46:46,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:46,739 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-16 10:46:46,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:46:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-16 10:46:46,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:46,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:46,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:46,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-16 10:46:46,741 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:46,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:46,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-16 10:46:46,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:46,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146419879] [2020-10-16 10:46:46,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:46,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146419879] [2020-10-16 10:46:46,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:46:46,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:46:46,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833336046] [2020-10-16 10:46:46,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:46:46,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:46,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:46:46,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:46:46,809 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-16 10:46:46,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:46,901 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 10:46:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:46,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:46:46,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:46,903 INFO L225 Difference]: With dead ends: 105 [2020-10-16 10:46:46,903 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 10:46:46,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:46:46,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 10:46:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-16 10:46:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:46:46,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-16 10:46:46,908 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-16 10:46:46,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:46,908 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-16 10:46:46,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:46:46,908 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-16 10:46:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:46,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:46,910 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:46,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-16 10:46:46,910 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:46,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:46,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-16 10:46:46,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:46,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240821195] [2020-10-16 10:46:46,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:46,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240821195] [2020-10-16 10:46:46,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514127791] [2020-10-16 10:46:46,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:47,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:46:47,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:47,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:47,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:47,088 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:47,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:47,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-16 10:46:47,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31314090] [2020-10-16 10:46:47,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:46:47,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:47,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:46:47,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:46:47,112 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-16 10:46:47,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:47,218 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-16 10:46:47,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:47,219 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-16 10:46:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:47,220 INFO L225 Difference]: With dead ends: 122 [2020-10-16 10:46:47,220 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:46:47,220 INFO L677 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 [2020-10-16 10:46:47,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:46:47,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-16 10:46:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 10:46:47,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-16 10:46:47,225 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-16 10:46:47,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:47,225 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-16 10:46:47,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:46:47,226 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-16 10:46:47,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:47,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:47,226 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:47,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 10:46:47,438 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:47,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:47,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-16 10:46:47,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:47,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444413044] [2020-10-16 10:46:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:47,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444413044] [2020-10-16 10:46:47,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434389043] [2020-10-16 10:46:47,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:47,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:46:47,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:47,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:47,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:47,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:47,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:47,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973713570] [2020-10-16 10:46:47,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:47,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:47,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:47,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:47,670 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-16 10:46:47,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:47,702 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-16 10:46:47,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:47,703 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 10:46:47,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:47,704 INFO L225 Difference]: With dead ends: 108 [2020-10-16 10:46:47,704 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 10:46:47,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:47,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 10:46:47,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-16 10:46:47,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 10:46:47,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-16 10:46:47,709 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-16 10:46:47,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:47,709 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-16 10:46:47,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:47,710 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-16 10:46:47,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:47,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:47,710 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:47,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:47,921 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:47,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:47,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-16 10:46:47,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:47,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245262944] [2020-10-16 10:46:47,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:48,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245262944] [2020-10-16 10:46:48,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035987621] [2020-10-16 10:46:48,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:48,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:48,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:48,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:48,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:48,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864783266] [2020-10-16 10:46:48,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:48,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:48,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:48,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:48,147 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-16 10:46:48,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:48,192 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-16 10:46:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:46:48,193 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 10:46:48,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:48,194 INFO L225 Difference]: With dead ends: 116 [2020-10-16 10:46:48,194 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:46:48,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:46:48,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:46:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-16 10:46:48,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 10:46:48,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-16 10:46:48,199 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-16 10:46:48,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:48,199 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-16 10:46:48,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:48,199 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-16 10:46:48,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:48,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:48,200 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:48,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 10:46:48,411 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:48,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:48,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-16 10:46:48,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:48,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997523004] [2020-10-16 10:46:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:48,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997523004] [2020-10-16 10:46:48,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218556548] [2020-10-16 10:46:48,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:48,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:48,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:48,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:48,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:48,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:48,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:48,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082007953] [2020-10-16 10:46:48,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:48,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:48,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:48,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:48,615 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-16 10:46:48,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:48,692 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-16 10:46:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:48,693 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 10:46:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:48,694 INFO L225 Difference]: With dead ends: 115 [2020-10-16 10:46:48,694 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 10:46:48,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:48,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 10:46:48,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-16 10:46:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 10:46:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-16 10:46:48,699 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-16 10:46:48,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:48,699 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-16 10:46:48,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-16 10:46:48,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:46:48,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:48,700 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:48,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 10:46:48,912 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:48,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:48,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-16 10:46:48,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:48,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225454953] [2020-10-16 10:46:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:48,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225454953] [2020-10-16 10:46:48,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456814331] [2020-10-16 10:46:48,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:49,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:46:49,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:49,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:49,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:49,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:46:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:49,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:49,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:49,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307138434] [2020-10-16 10:46:49,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:49,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:49,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:49,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:49,118 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-16 10:46:49,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:49,232 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-16 10:46:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:49,233 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 10:46:49,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:49,234 INFO L225 Difference]: With dead ends: 124 [2020-10-16 10:46:49,234 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 10:46:49,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:46:49,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 10:46:49,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-16 10:46:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 10:46:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-16 10:46:49,239 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-16 10:46:49,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:49,240 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-16 10:46:49,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:49,240 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-16 10:46:49,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:49,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:49,241 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:49,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 10:46:49,452 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:49,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:49,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-16 10:46:49,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:49,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611830252] [2020-10-16 10:46:49,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:49,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611830252] [2020-10-16 10:46:49,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122663242] [2020-10-16 10:46:49,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:49,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:49,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:49,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:49,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:49,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:49,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:49,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321569998] [2020-10-16 10:46:49,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:49,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:49,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:49,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:49,641 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-16 10:46:49,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:49,688 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-16 10:46:49,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:46:49,689 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:49,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:49,691 INFO L225 Difference]: With dead ends: 113 [2020-10-16 10:46:49,691 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 10:46:49,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:49,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 10:46:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-16 10:46:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-16 10:46:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-16 10:46:49,697 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-16 10:46:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:49,697 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-16 10:46:49,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:49,697 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-16 10:46:49,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:49,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:49,698 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:49,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 10:46:49,899 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:49,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:49,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-16 10:46:49,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:49,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799843581] [2020-10-16 10:46:49,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:49,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799843581] [2020-10-16 10:46:49,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46367943] [2020-10-16 10:46:49,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:50,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:46:50,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:50,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:50,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:50,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:50,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:50,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155037119] [2020-10-16 10:46:50,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:50,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:50,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:50,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:50,122 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-16 10:46:50,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:50,199 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-16 10:46:50,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:46:50,199 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:50,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:50,200 INFO L225 Difference]: With dead ends: 118 [2020-10-16 10:46:50,200 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 10:46:50,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:50,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 10:46:50,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-16 10:46:50,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-16 10:46:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-16 10:46:50,205 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-16 10:46:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:50,205 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-16 10:46:50,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-16 10:46:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:50,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:50,206 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:50,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:50,416 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:50,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:50,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-16 10:46:50,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:50,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775660207] [2020-10-16 10:46:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:50,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775660207] [2020-10-16 10:46:50,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593839434] [2020-10-16 10:46:50,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:50,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:50,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:50,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:50,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:50,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467625368] [2020-10-16 10:46:50,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:50,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:50,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:50,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:50,638 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-16 10:46:50,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:50,715 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-16 10:46:50,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:46:50,716 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:50,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:50,717 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:46:50,717 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:46:50,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:46:50,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-16 10:46:50,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 10:46:50,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-16 10:46:50,723 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-16 10:46:50,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:50,724 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-16 10:46:50,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:50,724 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-16 10:46:50,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:50,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:50,725 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:50,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:50,937 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:50,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:50,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-16 10:46:50,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:50,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085264417] [2020-10-16 10:46:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:51,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085264417] [2020-10-16 10:46:51,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805555457] [2020-10-16 10:46:51,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:51,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:51,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:51,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:51,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:51,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:51,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:51,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60186574] [2020-10-16 10:46:51,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:51,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:51,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:51,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:51,250 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-16 10:46:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:51,318 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-16 10:46:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:46:51,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:51,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:51,320 INFO L225 Difference]: With dead ends: 122 [2020-10-16 10:46:51,321 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 10:46:51,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:46:51,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 10:46:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-16 10:46:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-16 10:46:51,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-16 10:46:51,327 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-16 10:46:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:51,328 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-16 10:46:51,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-16 10:46:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:51,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:51,329 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:51,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 10:46:51,541 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:51,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:51,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-16 10:46:51,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:51,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208696052] [2020-10-16 10:46:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:51,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208696052] [2020-10-16 10:46:51,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980517744] [2020-10-16 10:46:51,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:51,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:46:51,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:51,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:51,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:51,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:51,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:51,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885795036] [2020-10-16 10:46:51,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:51,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:51,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:51,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:51,743 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-16 10:46:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:51,843 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-16 10:46:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:46:51,844 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:51,845 INFO L225 Difference]: With dead ends: 123 [2020-10-16 10:46:51,845 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 10:46:51,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:46:51,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 10:46:51,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-16 10:46:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 10:46:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-16 10:46:51,849 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-16 10:46:51,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:51,849 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-16 10:46:51,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:51,850 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-16 10:46:51,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:51,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:51,850 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:52,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:52,062 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:52,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:52,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-16 10:46:52,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:52,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160963684] [2020-10-16 10:46:52,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:52,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160963684] [2020-10-16 10:46:52,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529181114] [2020-10-16 10:46:52,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:52,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:46:52,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:52,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:52,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:52,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:52,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:52,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928633598] [2020-10-16 10:46:52,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:52,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:52,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:52,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:52,261 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-16 10:46:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:52,338 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-16 10:46:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:52,338 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:52,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:52,339 INFO L225 Difference]: With dead ends: 123 [2020-10-16 10:46:52,340 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 10:46:52,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:52,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 10:46:52,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-16 10:46:52,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-16 10:46:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-16 10:46:52,344 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-16 10:46:52,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:52,344 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-16 10:46:52,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-16 10:46:52,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:52,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:52,345 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:52,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 10:46:52,546 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:52,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:52,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-16 10:46:52,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:52,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513600926] [2020-10-16 10:46:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:52,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513600926] [2020-10-16 10:46:52,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591784424] [2020-10-16 10:46:52,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:52,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:52,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:52,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:52,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:52,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:46:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:52,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:52,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:52,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105780349] [2020-10-16 10:46:52,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:52,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:52,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:52,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:52,763 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-16 10:46:52,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:52,926 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-16 10:46:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:52,926 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:52,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:52,928 INFO L225 Difference]: With dead ends: 133 [2020-10-16 10:46:52,928 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 10:46:52,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:46:52,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 10:46:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-16 10:46:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-16 10:46:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-16 10:46:52,938 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-16 10:46:52,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:52,939 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-16 10:46:52,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:52,939 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-16 10:46:52,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:52,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:52,940 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:53,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:53,154 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:53,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:53,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-16 10:46:53,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:53,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907822770] [2020-10-16 10:46:53,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:53,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907822770] [2020-10-16 10:46:53,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162915677] [2020-10-16 10:46:53,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:53,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:46:53,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:53,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:53,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:53,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:53,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:53,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777253536] [2020-10-16 10:46:53,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:53,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:53,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:53,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:53,333 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-16 10:46:53,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:53,453 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-16 10:46:53,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:46:53,453 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:53,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:53,454 INFO L225 Difference]: With dead ends: 127 [2020-10-16 10:46:53,454 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 10:46:53,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:46:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 10:46:53,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-16 10:46:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-16 10:46:53,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-16 10:46:53,459 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-16 10:46:53,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:53,460 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-16 10:46:53,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:53,460 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-16 10:46:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:53,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:53,461 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:53,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 10:46:53,670 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:53,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:53,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-16 10:46:53,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:53,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721277782] [2020-10-16 10:46:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:53,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721277782] [2020-10-16 10:46:53,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354825237] [2020-10-16 10:46:53,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:53,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:53,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:53,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:53,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:53,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:53,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141126332] [2020-10-16 10:46:53,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:53,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:53,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:53,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:53,830 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-16 10:46:54,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:54,041 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-16 10:46:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:46:54,042 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:54,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:54,043 INFO L225 Difference]: With dead ends: 141 [2020-10-16 10:46:54,043 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 10:46:54,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:46:54,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 10:46:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-16 10:46:54,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-16 10:46:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-16 10:46:54,049 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-16 10:46:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:54,049 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-16 10:46:54,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-16 10:46:54,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:54,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:54,050 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:54,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 10:46:54,262 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:54,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:54,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-16 10:46:54,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:54,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560358986] [2020-10-16 10:46:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:54,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560358986] [2020-10-16 10:46:54,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291446932] [2020-10-16 10:46:54,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:54,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:54,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:54,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:54,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:54,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:46:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:54,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:54,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:54,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11976922] [2020-10-16 10:46:54,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:54,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:54,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:54,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:54,451 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-16 10:46:54,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:54,603 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-16 10:46:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:54,603 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:54,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:54,604 INFO L225 Difference]: With dead ends: 136 [2020-10-16 10:46:54,604 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 10:46:54,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:46:54,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 10:46:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-16 10:46:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 10:46:54,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-16 10:46:54,609 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-16 10:46:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:54,610 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-16 10:46:54,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:54,610 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-16 10:46:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:54,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:54,611 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:54,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-16 10:46:54,812 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:54,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:54,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-16 10:46:54,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:54,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566828193] [2020-10-16 10:46:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:54,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566828193] [2020-10-16 10:46:54,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167306709] [2020-10-16 10:46:54,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:54,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:46:54,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:54,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:54,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:54,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:54,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:54,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652056690] [2020-10-16 10:46:54,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:54,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:54,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:54,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:54,993 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-16 10:46:55,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:55,091 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-16 10:46:55,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:46:55,092 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:55,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:55,093 INFO L225 Difference]: With dead ends: 130 [2020-10-16 10:46:55,093 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 10:46:55,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:46:55,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 10:46:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-16 10:46:55,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 10:46:55,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-16 10:46:55,097 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-16 10:46:55,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:55,098 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-16 10:46:55,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-16 10:46:55,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:55,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:55,099 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:55,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 10:46:55,309 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:55,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:55,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-16 10:46:55,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:55,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345500004] [2020-10-16 10:46:55,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:55,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345500004] [2020-10-16 10:46:55,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740636305] [2020-10-16 10:46:55,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:55,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:46:55,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:55,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:55,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:55,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:55,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:55,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843133077] [2020-10-16 10:46:55,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:55,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:55,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:55,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:55,501 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-16 10:46:55,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:55,633 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-16 10:46:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:46:55,633 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:55,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:55,635 INFO L225 Difference]: With dead ends: 131 [2020-10-16 10:46:55,635 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 10:46:55,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:46:55,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 10:46:55,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-16 10:46:55,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 10:46:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-16 10:46:55,641 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-16 10:46:55,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:55,641 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-16 10:46:55,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:55,641 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-16 10:46:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:55,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:55,642 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:55,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 10:46:55,854 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:55,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:55,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-16 10:46:55,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:55,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590419536] [2020-10-16 10:46:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:55,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590419536] [2020-10-16 10:46:55,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080128170] [2020-10-16 10:46:55,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:55,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:46:55,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:55,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:55,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:56,024 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:56,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:56,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:56,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551361457] [2020-10-16 10:46:56,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:56,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:56,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:56,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:56,035 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-16 10:46:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:56,172 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-16 10:46:56,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:56,172 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:56,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:56,173 INFO L225 Difference]: With dead ends: 131 [2020-10-16 10:46:56,174 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 10:46:56,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:46:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 10:46:56,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-16 10:46:56,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 10:46:56,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-16 10:46:56,178 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-16 10:46:56,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:56,179 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-16 10:46:56,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-16 10:46:56,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:56,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:56,179 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:56,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:56,390 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:56,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:56,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-16 10:46:56,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:56,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625021769] [2020-10-16 10:46:56,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:56,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625021769] [2020-10-16 10:46:56,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491289408] [2020-10-16 10:46:56,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:56,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:46:56,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:56,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:56,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:56,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:46:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:56,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:56,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:56,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379989047] [2020-10-16 10:46:56,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:56,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:56,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:56,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:56,554 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-16 10:46:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:56,761 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-16 10:46:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:46:56,762 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:56,763 INFO L225 Difference]: With dead ends: 145 [2020-10-16 10:46:56,764 INFO L226 Difference]: Without dead ends: 140 [2020-10-16 10:46:56,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:46:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-16 10:46:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-16 10:46:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 10:46:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-16 10:46:56,768 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-16 10:46:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:56,769 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-16 10:46:56,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-16 10:46:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:56,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:56,769 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:56,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-16 10:46:56,980 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:56,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:56,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-16 10:46:56,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:56,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129979649] [2020-10-16 10:46:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:57,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129979649] [2020-10-16 10:46:57,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543584042] [2020-10-16 10:46:57,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:57,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:46:57,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:57,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:57,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:57,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 10:46:57,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381113139] [2020-10-16 10:46:57,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:46:57,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:57,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:46:57,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:46:57,155 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-16 10:46:57,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:57,329 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-16 10:46:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:46:57,329 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 10:46:57,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:57,330 INFO L225 Difference]: With dead ends: 135 [2020-10-16 10:46:57,330 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 10:46:57,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:46:57,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 10:46:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-16 10:46:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 10:46:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-16 10:46:57,334 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-16 10:46:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:57,335 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-16 10:46:57,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:46:57,335 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-16 10:46:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:57,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:57,336 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:57,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:46:57,547 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:57,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:57,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-16 10:46:57,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:57,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812694482] [2020-10-16 10:46:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:57,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812694482] [2020-10-16 10:46:57,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324017306] [2020-10-16 10:46:57,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:57,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:46:57,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:46:57,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:57,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:46:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:57,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:57,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-16 10:46:57,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838241710] [2020-10-16 10:46:57,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:46:57,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:57,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:46:57,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:46:57,767 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-16 10:46:57,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:57,910 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-16 10:46:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:46:57,911 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-16 10:46:57,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:57,913 INFO L225 Difference]: With dead ends: 143 [2020-10-16 10:46:57,913 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 10:46:57,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:46:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 10:46:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-16 10:46:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-16 10:46:57,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-16 10:46:57,917 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-16 10:46:57,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:57,918 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-16 10:46:57,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:46:57,918 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-16 10:46:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:57,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:57,919 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:58,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-16 10:46:58,129 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:58,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:58,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-16 10:46:58,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:58,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954564286] [2020-10-16 10:46:58,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:58,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954564286] [2020-10-16 10:46:58,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10451755] [2020-10-16 10:46:58,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:58,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:46:58,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:58,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:46:58,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:58,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:58,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:46:58,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517325953] [2020-10-16 10:46:58,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:46:58,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:58,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:46:58,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:58,363 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-16 10:46:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:58,404 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-16 10:46:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:46:58,405 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 10:46:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:58,406 INFO L225 Difference]: With dead ends: 132 [2020-10-16 10:46:58,406 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 10:46:58,406 INFO L677 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 [2020-10-16 10:46:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 10:46:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-16 10:46:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-16 10:46:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-16 10:46:58,409 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-16 10:46:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:58,410 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-16 10:46:58,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:46:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-16 10:46:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:58,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:58,411 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:58,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 10:46:58,619 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:58,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:58,619 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-16 10:46:58,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:58,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947089696] [2020-10-16 10:46:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:58,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947089696] [2020-10-16 10:46:58,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144538247] [2020-10-16 10:46:58,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:58,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:46:58,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:58,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:46:58,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:58,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:58,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:46:58,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443570564] [2020-10-16 10:46:58,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:46:58,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:58,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:46:58,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:58,850 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-16 10:46:58,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:58,908 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-16 10:46:58,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:46:58,909 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 10:46:58,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:58,910 INFO L225 Difference]: With dead ends: 143 [2020-10-16 10:46:58,910 INFO L226 Difference]: Without dead ends: 140 [2020-10-16 10:46:58,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:46:58,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-16 10:46:58,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-16 10:46:58,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-16 10:46:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-16 10:46:58,915 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-16 10:46:58,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:58,915 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-16 10:46:58,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:46:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-16 10:46:58,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:58,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:58,918 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:59,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-16 10:46:59,119 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:59,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:59,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-16 10:46:59,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:59,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597681189] [2020-10-16 10:46:59,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:59,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597681189] [2020-10-16 10:46:59,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281589808] [2020-10-16 10:46:59,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:59,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:46:59,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:46:59,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:46:59,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:59,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:59,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:46:59,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402950238] [2020-10-16 10:46:59,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:46:59,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:59,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:46:59,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:59,323 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-16 10:46:59,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:46:59,398 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-16 10:46:59,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:46:59,398 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 10:46:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:46:59,400 INFO L225 Difference]: With dead ends: 142 [2020-10-16 10:46:59,400 INFO L226 Difference]: Without dead ends: 139 [2020-10-16 10:46:59,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:46:59,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-16 10:46:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-16 10:46:59,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-16 10:46:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-16 10:46:59,404 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-16 10:46:59,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:46:59,404 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-16 10:46:59,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:46:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-16 10:46:59,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:46:59,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:46:59,405 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:46:59,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 10:46:59,615 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:46:59,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:46:59,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-16 10:46:59,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:46:59,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780139921] [2020-10-16 10:46:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:46:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:59,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780139921] [2020-10-16 10:46:59,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394964920] [2020-10-16 10:46:59,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:46:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:46:59,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:46:59,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:46:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:46:59,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:46:59,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:46:59,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998143962] [2020-10-16 10:46:59,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:46:59,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:46:59,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:46:59,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:46:59,912 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-16 10:47:00,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:00,025 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-16 10:47:00,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:00,025 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 10:47:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:00,027 INFO L225 Difference]: With dead ends: 141 [2020-10-16 10:47:00,027 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 10:47:00,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 10:47:00,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-16 10:47:00,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-16 10:47:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-16 10:47:00,033 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-16 10:47:00,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:00,033 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-16 10:47:00,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:00,033 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-16 10:47:00,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:47:00,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:00,034 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:00,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 10:47:00,246 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:00,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:00,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-16 10:47:00,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:00,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826155054] [2020-10-16 10:47:00,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:00,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826155054] [2020-10-16 10:47:00,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094180295] [2020-10-16 10:47:00,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:00,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:00,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:00,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:00,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:00,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:00,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:00,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:00,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112534497] [2020-10-16 10:47:00,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:00,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:00,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:00,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:00,502 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-16 10:47:00,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:00,634 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-16 10:47:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:00,634 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 10:47:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:00,635 INFO L225 Difference]: With dead ends: 150 [2020-10-16 10:47:00,635 INFO L226 Difference]: Without dead ends: 144 [2020-10-16 10:47:00,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-16 10:47:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-16 10:47:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-16 10:47:00,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-16 10:47:00,639 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-16 10:47:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:00,639 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-16 10:47:00,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:00,639 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-16 10:47:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:00,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:00,640 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:00,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:00,849 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:00,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:00,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-16 10:47:00,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:00,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289145221] [2020-10-16 10:47:00,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:00,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289145221] [2020-10-16 10:47:00,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354642211] [2020-10-16 10:47:00,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:00,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:00,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:00,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:00,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:01,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:01,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:01,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595386946] [2020-10-16 10:47:01,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:01,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:01,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:01,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:01,046 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-16 10:47:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:01,089 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-16 10:47:01,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:47:01,089 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:01,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:01,091 INFO L225 Difference]: With dead ends: 138 [2020-10-16 10:47:01,091 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 10:47:01,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:01,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 10:47:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-16 10:47:01,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-16 10:47:01,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-16 10:47:01,096 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-16 10:47:01,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:01,096 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-16 10:47:01,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:01,096 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-16 10:47:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:01,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:01,097 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:01,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 10:47:01,308 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:01,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:01,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-16 10:47:01,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:01,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457061654] [2020-10-16 10:47:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:01,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457061654] [2020-10-16 10:47:01,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358577491] [2020-10-16 10:47:01,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:01,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:01,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:01,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:01,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:01,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:01,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:01,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198867830] [2020-10-16 10:47:01,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:01,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:01,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:01,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:01,546 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-16 10:47:01,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:01,650 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-16 10:47:01,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:47:01,651 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:01,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:01,652 INFO L225 Difference]: With dead ends: 145 [2020-10-16 10:47:01,653 INFO L226 Difference]: Without dead ends: 143 [2020-10-16 10:47:01,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:01,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-16 10:47:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-16 10:47:01,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-16 10:47:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-16 10:47:01,656 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-16 10:47:01,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:01,656 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-16 10:47:01,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-16 10:47:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:01,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:01,657 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:01,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 10:47:01,867 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:01,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:01,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-16 10:47:01,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:01,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615008536] [2020-10-16 10:47:01,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:01,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615008536] [2020-10-16 10:47:01,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424039256] [2020-10-16 10:47:01,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:01,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:01,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:01,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:01,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:02,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:02,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:02,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971759973] [2020-10-16 10:47:02,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:02,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:02,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:02,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:02,086 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-16 10:47:02,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:02,210 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-16 10:47:02,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:02,211 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:02,212 INFO L225 Difference]: With dead ends: 150 [2020-10-16 10:47:02,212 INFO L226 Difference]: Without dead ends: 148 [2020-10-16 10:47:02,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:02,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-16 10:47:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-16 10:47:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-16 10:47:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-16 10:47:02,217 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-16 10:47:02,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:02,217 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-16 10:47:02,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-16 10:47:02,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:02,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:02,218 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:02,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:02,430 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:02,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:02,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-16 10:47:02,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:02,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760994185] [2020-10-16 10:47:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:02,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760994185] [2020-10-16 10:47:02,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452438268] [2020-10-16 10:47:02,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:02,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:02,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:02,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:02,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:02,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:02,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:02,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392746940] [2020-10-16 10:47:02,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:02,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:02,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:02,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:02,625 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-16 10:47:02,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:02,736 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-16 10:47:02,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:02,736 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:02,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:02,737 INFO L225 Difference]: With dead ends: 148 [2020-10-16 10:47:02,738 INFO L226 Difference]: Without dead ends: 146 [2020-10-16 10:47:02,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:02,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-16 10:47:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-16 10:47:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-16 10:47:02,742 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-16 10:47:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:02,742 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-16 10:47:02,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:02,743 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-16 10:47:02,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:02,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:02,743 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:02,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 10:47:02,953 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-16 10:47:02,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:02,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100490444] [2020-10-16 10:47:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:03,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100490444] [2020-10-16 10:47:03,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533148820] [2020-10-16 10:47:03,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:03,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:03,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:03,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:03,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:03,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:03,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:03,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092494560] [2020-10-16 10:47:03,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:03,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:03,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:03,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:03,162 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-16 10:47:03,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:03,287 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-16 10:47:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:03,287 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:03,289 INFO L225 Difference]: With dead ends: 149 [2020-10-16 10:47:03,289 INFO L226 Difference]: Without dead ends: 147 [2020-10-16 10:47:03,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:03,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-16 10:47:03,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-16 10:47:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 10:47:03,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-16 10:47:03,294 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-16 10:47:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:03,294 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-16 10:47:03,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:03,294 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-16 10:47:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:03,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:03,295 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:03,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:03,505 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:03,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:03,505 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-16 10:47:03,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:03,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945325880] [2020-10-16 10:47:03,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:03,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945325880] [2020-10-16 10:47:03,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927706525] [2020-10-16 10:47:03,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:03,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:03,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:03,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:03,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:03,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140392199] [2020-10-16 10:47:03,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:03,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:03,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:03,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:03,745 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-16 10:47:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:03,799 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-16 10:47:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:47:03,799 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:03,801 INFO L225 Difference]: With dead ends: 152 [2020-10-16 10:47:03,801 INFO L226 Difference]: Without dead ends: 150 [2020-10-16 10:47:03,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:47:03,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-16 10:47:03,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-16 10:47:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 10:47:03,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-16 10:47:03,805 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-16 10:47:03,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:03,805 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-16 10:47:03,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:03,805 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-16 10:47:03,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:03,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:03,806 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:04,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 10:47:04,015 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:04,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-16 10:47:04,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:04,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514375219] [2020-10-16 10:47:04,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:04,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514375219] [2020-10-16 10:47:04,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030440048] [2020-10-16 10:47:04,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:04,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:04,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:04,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:04,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:04,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:04,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:04,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397106943] [2020-10-16 10:47:04,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:04,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:04,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:04,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:04,253 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-16 10:47:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:04,378 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-16 10:47:04,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:04,379 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:04,380 INFO L225 Difference]: With dead ends: 153 [2020-10-16 10:47:04,380 INFO L226 Difference]: Without dead ends: 151 [2020-10-16 10:47:04,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-16 10:47:04,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-16 10:47:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-16 10:47:04,385 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-16 10:47:04,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:04,385 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-16 10:47:04,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:04,386 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-16 10:47:04,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:04,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:04,386 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:04,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-16 10:47:04,596 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:04,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:04,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-16 10:47:04,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:04,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567756427] [2020-10-16 10:47:04,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:04,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567756427] [2020-10-16 10:47:04,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516589289] [2020-10-16 10:47:04,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:04,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:04,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:04,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:04,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:04,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:04,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:04,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137852603] [2020-10-16 10:47:04,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:04,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:04,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:04,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:04,797 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-16 10:47:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:04,935 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 10:47:04,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:04,936 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:04,937 INFO L225 Difference]: With dead ends: 156 [2020-10-16 10:47:04,938 INFO L226 Difference]: Without dead ends: 154 [2020-10-16 10:47:04,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-16 10:47:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-16 10:47:04,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-16 10:47:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-16 10:47:04,941 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-16 10:47:04,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:04,942 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-16 10:47:04,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:04,942 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-16 10:47:04,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:04,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:04,943 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:05,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 10:47:05,153 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:05,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:05,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-16 10:47:05,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:05,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835158968] [2020-10-16 10:47:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:05,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835158968] [2020-10-16 10:47:05,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897090225] [2020-10-16 10:47:05,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:05,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:05,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:05,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:05,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:05,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:05,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:05,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127146534] [2020-10-16 10:47:05,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:05,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:05,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:05,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:05,396 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-16 10:47:05,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:05,472 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-16 10:47:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:05,473 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:05,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:05,474 INFO L225 Difference]: With dead ends: 148 [2020-10-16 10:47:05,474 INFO L226 Difference]: Without dead ends: 146 [2020-10-16 10:47:05,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:05,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-16 10:47:05,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-16 10:47:05,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 10:47:05,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-16 10:47:05,478 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-16 10:47:05,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:05,479 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-16 10:47:05,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:05,479 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-16 10:47:05,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:05,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:05,480 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:05,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-16 10:47:05,690 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:05,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:05,690 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-16 10:47:05,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:05,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409662357] [2020-10-16 10:47:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:05,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409662357] [2020-10-16 10:47:05,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992249779] [2020-10-16 10:47:05,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:05,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:05,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:05,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:05,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:05,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:05,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:05,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208790078] [2020-10-16 10:47:05,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:05,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:05,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:05,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:05,900 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-16 10:47:06,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:06,071 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-16 10:47:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:06,071 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:06,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:06,073 INFO L225 Difference]: With dead ends: 157 [2020-10-16 10:47:06,073 INFO L226 Difference]: Without dead ends: 155 [2020-10-16 10:47:06,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:06,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-16 10:47:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-16 10:47:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-16 10:47:06,076 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-16 10:47:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:06,077 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-16 10:47:06,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-16 10:47:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:06,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:06,077 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:06,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:06,278 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:06,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:06,279 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-16 10:47:06,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:06,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195753103] [2020-10-16 10:47:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:06,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195753103] [2020-10-16 10:47:06,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693657818] [2020-10-16 10:47:06,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:06,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:06,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:06,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:06,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:06,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:06,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:06,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603413590] [2020-10-16 10:47:06,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:06,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:06,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:06,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:06,468 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-10-16 10:47:06,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:06,565 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-16 10:47:06,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:06,566 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:06,567 INFO L225 Difference]: With dead ends: 149 [2020-10-16 10:47:06,567 INFO L226 Difference]: Without dead ends: 147 [2020-10-16 10:47:06,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-16 10:47:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-16 10:47:06,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 10:47:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 10:47:06,571 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 10:47:06,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:06,571 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 10:47:06,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 10:47:06,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:06,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:06,572 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:06,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 10:47:06,773 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:06,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-16 10:47:06,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:06,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23005027] [2020-10-16 10:47:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:06,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23005027] [2020-10-16 10:47:06,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47268383] [2020-10-16 10:47:06,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:06,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:06,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:06,951 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:06,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:06,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:06,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184577885] [2020-10-16 10:47:06,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:06,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:06,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:06,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:06,988 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 10:47:07,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:07,234 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-16 10:47:07,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:07,235 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:07,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:07,236 INFO L225 Difference]: With dead ends: 164 [2020-10-16 10:47:07,236 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 10:47:07,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:07,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 10:47:07,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-16 10:47:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 10:47:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-16 10:47:07,240 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-16 10:47:07,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:07,240 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-16 10:47:07,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:07,240 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-16 10:47:07,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:07,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:07,240 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:07,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 10:47:07,442 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:07,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:07,443 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-16 10:47:07,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:07,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254054908] [2020-10-16 10:47:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:07,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254054908] [2020-10-16 10:47:07,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295070148] [2020-10-16 10:47:07,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:07,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:07,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:07,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:07,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:07,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:07,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:07,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678597920] [2020-10-16 10:47:07,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:07,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:07,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:07,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:07,658 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-16 10:47:07,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:07,825 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 10:47:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:07,826 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:07,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:07,827 INFO L225 Difference]: With dead ends: 156 [2020-10-16 10:47:07,827 INFO L226 Difference]: Without dead ends: 154 [2020-10-16 10:47:07,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:47:07,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-16 10:47:07,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-16 10:47:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 10:47:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 10:47:07,831 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 10:47:07,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:07,831 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 10:47:07,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 10:47:07,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:07,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:07,832 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:08,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:08,033 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:08,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:08,034 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-16 10:47:08,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:08,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892622522] [2020-10-16 10:47:08,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:08,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892622522] [2020-10-16 10:47:08,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455185052] [2020-10-16 10:47:08,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:08,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:08,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:08,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:08,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:08,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:08,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:08,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:08,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546160151] [2020-10-16 10:47:08,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:08,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:08,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:08,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:08,264 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 10:47:08,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:08,592 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-16 10:47:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:47:08,593 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:08,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:08,594 INFO L225 Difference]: With dead ends: 176 [2020-10-16 10:47:08,594 INFO L226 Difference]: Without dead ends: 171 [2020-10-16 10:47:08,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:47:08,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-16 10:47:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-16 10:47:08,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 10:47:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 10:47:08,600 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 10:47:08,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:08,600 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 10:47:08,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:08,600 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 10:47:08,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:08,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:08,601 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:08,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-16 10:47:08,810 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:08,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:08,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-16 10:47:08,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:08,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177758607] [2020-10-16 10:47:08,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:08,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177758607] [2020-10-16 10:47:08,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493570611] [2020-10-16 10:47:08,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:08,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:08,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:08,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:08,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:08,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:09,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:09,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:09,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099553368] [2020-10-16 10:47:09,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:09,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:09,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:09,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:09,028 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 10:47:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:09,271 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-16 10:47:09,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:09,271 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:09,273 INFO L225 Difference]: With dead ends: 166 [2020-10-16 10:47:09,273 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 10:47:09,273 INFO L677 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 [2020-10-16 10:47:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 10:47:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-16 10:47:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 10:47:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-16 10:47:09,277 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-16 10:47:09,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:09,277 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-16 10:47:09,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:09,278 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-16 10:47:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:09,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:09,278 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:09,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:09,487 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:09,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:09,488 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-16 10:47:09,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:09,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625374004] [2020-10-16 10:47:09,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:09,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625374004] [2020-10-16 10:47:09,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287722923] [2020-10-16 10:47:09,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:09,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:09,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:09,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:09,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:09,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:09,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:09,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341887791] [2020-10-16 10:47:09,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:09,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:09,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:09,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:09,670 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-16 10:47:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:09,848 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-16 10:47:09,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:09,848 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:09,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:09,850 INFO L225 Difference]: With dead ends: 163 [2020-10-16 10:47:09,850 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 10:47:09,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:47:09,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 10:47:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-16 10:47:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-16 10:47:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-16 10:47:09,853 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-16 10:47:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:09,854 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-16 10:47:09,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:09,854 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-16 10:47:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:09,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:09,855 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:10,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 10:47:10,055 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:10,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:10,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-16 10:47:10,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:10,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527114911] [2020-10-16 10:47:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:10,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527114911] [2020-10-16 10:47:10,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125256077] [2020-10-16 10:47:10,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:10,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:10,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:10,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:10,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:10,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:10,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:10,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653131568] [2020-10-16 10:47:10,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:10,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:10,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:10,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:10,277 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-16 10:47:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:10,552 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-16 10:47:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:10,553 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:10,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:10,554 INFO L225 Difference]: With dead ends: 170 [2020-10-16 10:47:10,555 INFO L226 Difference]: Without dead ends: 168 [2020-10-16 10:47:10,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:47:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-16 10:47:10,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-16 10:47:10,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-16 10:47:10,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-16 10:47:10,561 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-16 10:47:10,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:10,561 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-16 10:47:10,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:10,561 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-16 10:47:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:10,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:10,562 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:10,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:10,775 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:10,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:10,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-16 10:47:10,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:10,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762578054] [2020-10-16 10:47:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:10,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762578054] [2020-10-16 10:47:10,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981187858] [2020-10-16 10:47:10,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:10,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:10,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:10,957 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:10,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:10,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:10,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185381763] [2020-10-16 10:47:10,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:10,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:10,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:10,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:10,967 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-16 10:47:11,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:11,227 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-16 10:47:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:47:11,228 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:11,229 INFO L225 Difference]: With dead ends: 177 [2020-10-16 10:47:11,229 INFO L226 Difference]: Without dead ends: 172 [2020-10-16 10:47:11,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:47:11,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-16 10:47:11,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-16 10:47:11,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-16 10:47:11,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-16 10:47:11,233 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-16 10:47:11,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:11,233 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-16 10:47:11,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-16 10:47:11,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:11,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:11,234 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:11,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 10:47:11,443 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:11,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:11,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-16 10:47:11,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:11,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883121704] [2020-10-16 10:47:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:11,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883121704] [2020-10-16 10:47:11,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924100755] [2020-10-16 10:47:11,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:11,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:11,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:11,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:11,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:11,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:11,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:11,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:11,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408161806] [2020-10-16 10:47:11,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:11,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:11,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:11,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:11,622 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-16 10:47:11,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:11,977 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-16 10:47:11,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:47:11,978 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:11,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:11,979 INFO L225 Difference]: With dead ends: 190 [2020-10-16 10:47:11,979 INFO L226 Difference]: Without dead ends: 182 [2020-10-16 10:47:11,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:47:11,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-16 10:47:11,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-16 10:47:11,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 10:47:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-16 10:47:11,983 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-16 10:47:11,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:11,984 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-16 10:47:11,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-16 10:47:11,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:11,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:11,984 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:12,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 10:47:12,185 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:12,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:12,186 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-16 10:47:12,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:12,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822269534] [2020-10-16 10:47:12,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:12,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822269534] [2020-10-16 10:47:12,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113940764] [2020-10-16 10:47:12,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:12,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:47:12,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:12,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:47:12,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:12,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:12,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-10-16 10:47:12,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441440697] [2020-10-16 10:47:12,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:47:12,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:12,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:47:12,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:47:12,338 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 12 states. [2020-10-16 10:47:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:12,681 INFO L93 Difference]: Finished difference Result 177 states and 419 transitions. [2020-10-16 10:47:12,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:47:12,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-10-16 10:47:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:12,683 INFO L225 Difference]: With dead ends: 177 [2020-10-16 10:47:12,683 INFO L226 Difference]: Without dead ends: 172 [2020-10-16 10:47:12,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:47:12,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-16 10:47:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 120. [2020-10-16 10:47:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-16 10:47:12,687 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-16 10:47:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:12,687 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-16 10:47:12,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:47:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-16 10:47:12,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:12,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:12,688 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:12,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 10:47:12,896 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:12,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:12,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-16 10:47:12,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:12,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548948560] [2020-10-16 10:47:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:12,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548948560] [2020-10-16 10:47:12,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791287464] [2020-10-16 10:47:12,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:12,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:12,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:12,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:12,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:13,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:13,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:13,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784295901] [2020-10-16 10:47:13,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:13,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:13,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:13,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:13,090 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-16 10:47:13,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:13,238 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-16 10:47:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:13,239 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:13,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:13,240 INFO L225 Difference]: With dead ends: 164 [2020-10-16 10:47:13,240 INFO L226 Difference]: Without dead ends: 162 [2020-10-16 10:47:13,241 INFO L677 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 [2020-10-16 10:47:13,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-16 10:47:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-16 10:47:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 10:47:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-16 10:47:13,245 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-16 10:47:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:13,245 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-16 10:47:13,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-16 10:47:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:13,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:13,246 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:13,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 10:47:13,456 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:13,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:13,456 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-16 10:47:13,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:13,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148862039] [2020-10-16 10:47:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:13,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148862039] [2020-10-16 10:47:13,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432290861] [2020-10-16 10:47:13,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:13,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:13,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:13,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:13,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:13,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:13,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:13,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556184473] [2020-10-16 10:47:13,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:13,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:13,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:13,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:13,696 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-16 10:47:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:13,839 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-16 10:47:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:13,840 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:13,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:13,841 INFO L225 Difference]: With dead ends: 161 [2020-10-16 10:47:13,841 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 10:47:13,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:13,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 10:47:13,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-16 10:47:13,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 10:47:13,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-16 10:47:13,845 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-16 10:47:13,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:13,845 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-16 10:47:13,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:13,845 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-16 10:47:13,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:13,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:13,846 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:14,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-16 10:47:14,054 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:14,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-16 10:47:14,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:14,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260749416] [2020-10-16 10:47:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:14,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260749416] [2020-10-16 10:47:14,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250965281] [2020-10-16 10:47:14,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:14,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:47:14,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:14,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:14,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:14,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:14,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:14,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121549749] [2020-10-16 10:47:14,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:14,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:14,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:14,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:14,244 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-16 10:47:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:14,433 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-16 10:47:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:14,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:14,435 INFO L225 Difference]: With dead ends: 165 [2020-10-16 10:47:14,435 INFO L226 Difference]: Without dead ends: 163 [2020-10-16 10:47:14,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:14,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-16 10:47:14,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-16 10:47:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 10:47:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-16 10:47:14,439 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-16 10:47:14,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:14,439 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-16 10:47:14,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:14,439 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-16 10:47:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:14,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:14,440 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:14,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-16 10:47:14,641 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:14,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:14,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-16 10:47:14,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:14,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608338144] [2020-10-16 10:47:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:14,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608338144] [2020-10-16 10:47:14,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97916289] [2020-10-16 10:47:14,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:14,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:14,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:14,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:14,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:14,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848497266] [2020-10-16 10:47:14,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:14,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:14,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:14,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:14,834 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-16 10:47:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:15,030 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-16 10:47:15,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:15,031 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:15,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:15,032 INFO L225 Difference]: With dead ends: 167 [2020-10-16 10:47:15,032 INFO L226 Difference]: Without dead ends: 165 [2020-10-16 10:47:15,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:15,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-16 10:47:15,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-16 10:47:15,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 10:47:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-16 10:47:15,036 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-16 10:47:15,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:15,037 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-16 10:47:15,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:15,037 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-16 10:47:15,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:15,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:15,038 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:15,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:15,249 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:15,249 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-16 10:47:15,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:15,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647482706] [2020-10-16 10:47:15,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:15,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647482706] [2020-10-16 10:47:15,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31909162] [2020-10-16 10:47:15,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:15,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:15,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:15,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:15,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:15,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:15,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:15,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269591470] [2020-10-16 10:47:15,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:15,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:15,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:15,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:15,433 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-16 10:47:15,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:15,675 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-16 10:47:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:47:15,676 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:15,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:15,677 INFO L225 Difference]: With dead ends: 168 [2020-10-16 10:47:15,677 INFO L226 Difference]: Without dead ends: 166 [2020-10-16 10:47:15,678 INFO L677 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 [2020-10-16 10:47:15,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-16 10:47:15,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-16 10:47:15,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:15,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-16 10:47:15,681 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-16 10:47:15,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:15,682 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-16 10:47:15,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:15,682 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-16 10:47:15,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:15,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:15,683 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:15,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:15,892 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:15,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:15,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-16 10:47:15,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:15,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727259734] [2020-10-16 10:47:15,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:15,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727259734] [2020-10-16 10:47:15,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913048027] [2020-10-16 10:47:15,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:15,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:15,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:15,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:15,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:16,053 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:16,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:16,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:16,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703843340] [2020-10-16 10:47:16,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:16,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:16,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:16,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:16,068 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-16 10:47:16,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:16,256 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-16 10:47:16,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:16,257 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:16,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:16,258 INFO L225 Difference]: With dead ends: 160 [2020-10-16 10:47:16,259 INFO L226 Difference]: Without dead ends: 155 [2020-10-16 10:47:16,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:16,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-16 10:47:16,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-16 10:47:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 10:47:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-16 10:47:16,262 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-16 10:47:16,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:16,263 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-16 10:47:16,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:16,263 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-16 10:47:16,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:16,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:16,263 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:16,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:16,464 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:16,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:16,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-16 10:47:16,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:16,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243923770] [2020-10-16 10:47:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:16,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243923770] [2020-10-16 10:47:16,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362646988] [2020-10-16 10:47:16,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:16,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:16,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:16,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:16,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:16,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:16,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:16,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:16,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637773791] [2020-10-16 10:47:16,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:16,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:16,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:16,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:16,682 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-16 10:47:17,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:17,011 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-16 10:47:17,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:47:17,011 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:17,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:17,013 INFO L225 Difference]: With dead ends: 189 [2020-10-16 10:47:17,013 INFO L226 Difference]: Without dead ends: 181 [2020-10-16 10:47:17,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:47:17,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-16 10:47:17,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-16 10:47:17,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 10:47:17,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-16 10:47:17,017 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-16 10:47:17,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:17,017 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-16 10:47:17,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-16 10:47:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:17,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:17,018 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:17,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:17,219 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:17,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:17,219 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-16 10:47:17,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:17,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374634405] [2020-10-16 10:47:17,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:17,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374634405] [2020-10-16 10:47:17,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035163861] [2020-10-16 10:47:17,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:17,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:17,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:17,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:17,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:17,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:17,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:17,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801156389] [2020-10-16 10:47:17,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:17,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:17,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:17,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:17,403 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-16 10:47:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:17,638 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-16 10:47:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:47:17,639 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:17,640 INFO L225 Difference]: With dead ends: 169 [2020-10-16 10:47:17,640 INFO L226 Difference]: Without dead ends: 167 [2020-10-16 10:47:17,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-16 10:47:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-16 10:47:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 10:47:17,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-16 10:47:17,643 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-16 10:47:17,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:17,643 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-16 10:47:17,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:17,643 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-16 10:47:17,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:17,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:17,644 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:17,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-16 10:47:17,845 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:17,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:17,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-16 10:47:17,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:17,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554939443] [2020-10-16 10:47:17,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:17,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554939443] [2020-10-16 10:47:17,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137921167] [2020-10-16 10:47:17,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:17,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:17,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:17,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:17,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:18,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:18,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:18,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:18,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168109270] [2020-10-16 10:47:18,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:18,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:18,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:18,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:18,032 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-16 10:47:18,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:18,373 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-16 10:47:18,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:47:18,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:18,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:18,375 INFO L225 Difference]: With dead ends: 192 [2020-10-16 10:47:18,375 INFO L226 Difference]: Without dead ends: 184 [2020-10-16 10:47:18,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:47:18,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-16 10:47:18,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-16 10:47:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-16 10:47:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-16 10:47:18,379 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-16 10:47:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:18,379 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-16 10:47:18,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-16 10:47:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:18,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:18,380 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:18,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:18,583 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:18,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:18,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-16 10:47:18,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:18,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483704367] [2020-10-16 10:47:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:18,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483704367] [2020-10-16 10:47:18,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324832312] [2020-10-16 10:47:18,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:18,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:47:18,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:18,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:18,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:18,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 10:47:18,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099111848] [2020-10-16 10:47:18,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:47:18,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:18,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:47:18,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:47:18,756 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-16 10:47:19,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:19,073 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-16 10:47:19,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:47:19,073 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 10:47:19,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:19,075 INFO L225 Difference]: With dead ends: 180 [2020-10-16 10:47:19,075 INFO L226 Difference]: Without dead ends: 175 [2020-10-16 10:47:19,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:47:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-16 10:47:19,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-16 10:47:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-16 10:47:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-16 10:47:19,078 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-16 10:47:19,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:19,079 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-16 10:47:19,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:47:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-16 10:47:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:19,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:19,079 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:19,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-16 10:47:19,283 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:19,283 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-16 10:47:19,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:19,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360639416] [2020-10-16 10:47:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:19,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360639416] [2020-10-16 10:47:19,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700887266] [2020-10-16 10:47:19,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:19,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:19,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:19,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:19,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:19,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:19,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:19,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 10:47:19,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645167657] [2020-10-16 10:47:19,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:47:19,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:19,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:47:19,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:19,518 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-16 10:47:19,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:19,661 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-16 10:47:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:19,662 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-16 10:47:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:19,663 INFO L225 Difference]: With dead ends: 164 [2020-10-16 10:47:19,663 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 10:47:19,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:47:19,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 10:47:19,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-16 10:47:19,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 10:47:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-16 10:47:19,666 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-16 10:47:19,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:19,667 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-16 10:47:19,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:47:19,667 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-16 10:47:19,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:19,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:19,668 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:19,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:19,879 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:19,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:19,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-16 10:47:19,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:19,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579439308] [2020-10-16 10:47:19,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:19,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579439308] [2020-10-16 10:47:19,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087285376] [2020-10-16 10:47:19,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:20,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:47:20,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:20,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:20,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:20,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:20,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:20,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458257820] [2020-10-16 10:47:20,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:20,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:20,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:20,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:20,147 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-16 10:47:20,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:20,198 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 10:47:20,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:47:20,199 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:20,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:20,200 INFO L225 Difference]: With dead ends: 156 [2020-10-16 10:47:20,201 INFO L226 Difference]: Without dead ends: 153 [2020-10-16 10:47:20,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:20,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-16 10:47:20,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-16 10:47:20,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-16 10:47:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-16 10:47:20,203 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-16 10:47:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:20,204 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-16 10:47:20,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-16 10:47:20,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:20,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:20,204 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:20,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-16 10:47:20,414 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:20,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:20,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-16 10:47:20,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:20,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930687552] [2020-10-16 10:47:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:20,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930687552] [2020-10-16 10:47:20,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29754803] [2020-10-16 10:47:20,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:20,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:20,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:20,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:20,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:20,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:20,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:20,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441439312] [2020-10-16 10:47:20,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:20,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:20,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:20,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:20,680 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-16 10:47:20,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:20,744 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-16 10:47:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:20,744 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:20,745 INFO L225 Difference]: With dead ends: 170 [2020-10-16 10:47:20,745 INFO L226 Difference]: Without dead ends: 167 [2020-10-16 10:47:20,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:20,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-16 10:47:20,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-16 10:47:20,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-16 10:47:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-16 10:47:20,748 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-16 10:47:20,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:20,750 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-16 10:47:20,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:20,750 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-16 10:47:20,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:20,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:20,751 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:20,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:20,959 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:20,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:20,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-16 10:47:20,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:20,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92335333] [2020-10-16 10:47:20,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:21,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92335333] [2020-10-16 10:47:21,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208051101] [2020-10-16 10:47:21,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:21,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:21,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:21,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:21,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:21,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:21,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:21,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96164691] [2020-10-16 10:47:21,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:21,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:21,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:21,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:21,213 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-16 10:47:21,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:21,303 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-16 10:47:21,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:21,304 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:21,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:21,305 INFO L225 Difference]: With dead ends: 169 [2020-10-16 10:47:21,305 INFO L226 Difference]: Without dead ends: 166 [2020-10-16 10:47:21,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-16 10:47:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-16 10:47:21,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-16 10:47:21,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-16 10:47:21,308 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-16 10:47:21,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:21,308 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-16 10:47:21,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:21,308 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-16 10:47:21,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:21,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:21,309 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:21,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:21,516 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:21,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:21,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-16 10:47:21,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:21,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631109440] [2020-10-16 10:47:21,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:21,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631109440] [2020-10-16 10:47:21,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297331276] [2020-10-16 10:47:21,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:21,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:47:21,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:21,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:21,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:21,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:21,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:21,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684294530] [2020-10-16 10:47:21,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:21,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:21,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:21,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:21,778 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-16 10:47:21,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:21,881 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-16 10:47:21,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:21,882 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:21,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:21,883 INFO L225 Difference]: With dead ends: 168 [2020-10-16 10:47:21,883 INFO L226 Difference]: Without dead ends: 165 [2020-10-16 10:47:21,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:21,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-16 10:47:21,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-16 10:47:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-16 10:47:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-16 10:47:21,887 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-16 10:47:21,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:21,887 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-16 10:47:21,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:21,887 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-16 10:47:21,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:21,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:21,888 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:22,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-16 10:47:22,097 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:22,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:22,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-16 10:47:22,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:22,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941424225] [2020-10-16 10:47:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:22,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941424225] [2020-10-16 10:47:22,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110191958] [2020-10-16 10:47:22,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:22,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:22,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:22,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:22,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:22,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10406676] [2020-10-16 10:47:22,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:22,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:22,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:22,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:22,338 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-16 10:47:22,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:22,469 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-16 10:47:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:22,470 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:22,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:22,471 INFO L225 Difference]: With dead ends: 167 [2020-10-16 10:47:22,471 INFO L226 Difference]: Without dead ends: 164 [2020-10-16 10:47:22,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:47:22,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-16 10:47:22,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-16 10:47:22,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-16 10:47:22,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-16 10:47:22,475 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-16 10:47:22,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:22,475 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-16 10:47:22,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:22,475 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-16 10:47:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:47:22,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:22,476 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:22,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:22,676 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:22,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:22,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-16 10:47:22,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:22,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474686840] [2020-10-16 10:47:22,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:22,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474686840] [2020-10-16 10:47:22,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882538133] [2020-10-16 10:47:22,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:22,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:22,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:22,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:22,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:22,891 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:22,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:22,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:22,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740882361] [2020-10-16 10:47:22,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:22,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:22,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:22,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:22,902 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-16 10:47:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:23,099 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-16 10:47:23,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:23,099 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 10:47:23,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:23,101 INFO L225 Difference]: With dead ends: 176 [2020-10-16 10:47:23,101 INFO L226 Difference]: Without dead ends: 170 [2020-10-16 10:47:23,102 INFO L677 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 [2020-10-16 10:47:23,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-16 10:47:23,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-16 10:47:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-16 10:47:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-16 10:47:23,105 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-16 10:47:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:23,105 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-16 10:47:23,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:23,105 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-16 10:47:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:23,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:23,106 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:23,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:23,307 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:23,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:23,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-16 10:47:23,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:23,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487586101] [2020-10-16 10:47:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:23,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487586101] [2020-10-16 10:47:23,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241561505] [2020-10-16 10:47:23,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:23,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:23,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:23,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:23,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:23,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:23,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:23,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210266855] [2020-10-16 10:47:23,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:23,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:23,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:23,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:23,547 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-16 10:47:23,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:23,601 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-16 10:47:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:47:23,601 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:23,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:23,603 INFO L225 Difference]: With dead ends: 163 [2020-10-16 10:47:23,603 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 10:47:23,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 10:47:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-16 10:47:23,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-16 10:47:23,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-16 10:47:23,606 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-16 10:47:23,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:23,607 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-16 10:47:23,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-16 10:47:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:23,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:23,607 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:23,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-16 10:47:23,808 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:23,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:23,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-16 10:47:23,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:23,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389768656] [2020-10-16 10:47:23,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:23,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389768656] [2020-10-16 10:47:23,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560133189] [2020-10-16 10:47:23,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:23,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:23,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:23,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:23,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:24,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:24,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:24,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400589676] [2020-10-16 10:47:24,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:24,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:24,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:24,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:24,070 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-16 10:47:24,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:24,218 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-16 10:47:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:24,219 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:24,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:24,221 INFO L225 Difference]: With dead ends: 172 [2020-10-16 10:47:24,221 INFO L226 Difference]: Without dead ends: 170 [2020-10-16 10:47:24,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:47:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-16 10:47:24,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-16 10:47:24,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 10:47:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-16 10:47:24,224 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-16 10:47:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:24,225 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-16 10:47:24,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-16 10:47:24,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:24,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:24,225 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:24,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:24,431 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:24,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:24,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-16 10:47:24,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:24,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653153205] [2020-10-16 10:47:24,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:24,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653153205] [2020-10-16 10:47:24,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548789431] [2020-10-16 10:47:24,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:24,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:24,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:24,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:24,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:24,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:24,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:24,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588376299] [2020-10-16 10:47:24,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:24,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:24,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:24,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:24,753 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-16 10:47:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:24,942 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-16 10:47:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:24,943 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:24,944 INFO L225 Difference]: With dead ends: 179 [2020-10-16 10:47:24,945 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 10:47:24,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:24,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 10:47:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-16 10:47:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-16 10:47:24,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-16 10:47:24,947 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-16 10:47:24,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:24,948 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-16 10:47:24,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-16 10:47:24,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:24,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:24,948 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:25,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-16 10:47:25,149 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:25,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-16 10:47:25,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:25,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820885888] [2020-10-16 10:47:25,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:25,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820885888] [2020-10-16 10:47:25,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315510440] [2020-10-16 10:47:25,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:25,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:25,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:25,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:25,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:25,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:25,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:25,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482580550] [2020-10-16 10:47:25,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:25,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:25,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:25,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:25,373 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-16 10:47:25,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:25,556 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-16 10:47:25,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:25,556 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:25,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:25,558 INFO L225 Difference]: With dead ends: 179 [2020-10-16 10:47:25,558 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 10:47:25,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:25,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 10:47:25,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-16 10:47:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 10:47:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-16 10:47:25,562 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-16 10:47:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:25,562 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-16 10:47:25,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-16 10:47:25,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:25,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:25,563 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:25,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-16 10:47:25,773 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:25,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-16 10:47:25,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:25,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546776939] [2020-10-16 10:47:25,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:25,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546776939] [2020-10-16 10:47:25,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343061403] [2020-10-16 10:47:25,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:25,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:25,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:25,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:25,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:25,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:25,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:25,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011698930] [2020-10-16 10:47:25,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:25,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:25,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:25,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:25,991 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-16 10:47:26,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:26,194 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-16 10:47:26,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:26,194 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:26,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:26,196 INFO L225 Difference]: With dead ends: 184 [2020-10-16 10:47:26,196 INFO L226 Difference]: Without dead ends: 182 [2020-10-16 10:47:26,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:26,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-16 10:47:26,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-16 10:47:26,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 10:47:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-16 10:47:26,200 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-16 10:47:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:26,200 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-16 10:47:26,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-16 10:47:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:26,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:26,201 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:26,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-16 10:47:26,412 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:26,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:26,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-16 10:47:26,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:26,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336542927] [2020-10-16 10:47:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:26,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336542927] [2020-10-16 10:47:26,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962179961] [2020-10-16 10:47:26,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:26,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:26,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:26,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:26,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:26,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434888980] [2020-10-16 10:47:26,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:26,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:26,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:26,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:26,636 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-16 10:47:26,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:26,838 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-16 10:47:26,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:26,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:26,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:26,840 INFO L225 Difference]: With dead ends: 179 [2020-10-16 10:47:26,840 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 10:47:26,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:26,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 10:47:26,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-16 10:47:26,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-16 10:47:26,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-16 10:47:26,844 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-16 10:47:26,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:26,844 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-16 10:47:26,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:26,844 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-16 10:47:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:26,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:26,844 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:27,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:27,045 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:27,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-16 10:47:27,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:27,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591387238] [2020-10-16 10:47:27,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:27,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591387238] [2020-10-16 10:47:27,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579386998] [2020-10-16 10:47:27,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:27,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:27,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:27,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:27,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:27,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:27,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:27,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490455370] [2020-10-16 10:47:27,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:27,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:27,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:27,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:27,278 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-16 10:47:27,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:27,436 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-16 10:47:27,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:27,437 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:27,439 INFO L225 Difference]: With dead ends: 176 [2020-10-16 10:47:27,439 INFO L226 Difference]: Without dead ends: 174 [2020-10-16 10:47:27,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:47:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-16 10:47:27,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-16 10:47:27,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 10:47:27,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-16 10:47:27,442 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-16 10:47:27,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:27,442 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-16 10:47:27,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-16 10:47:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:27,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:27,443 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:27,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:27,643 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:27,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:27,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-16 10:47:27,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:27,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504231034] [2020-10-16 10:47:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:27,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504231034] [2020-10-16 10:47:27,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456623902] [2020-10-16 10:47:27,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:27,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:47:27,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:27,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:27,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:27,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:27,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:27,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885172957] [2020-10-16 10:47:27,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:27,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:27,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:27,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:27,884 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-16 10:47:28,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:28,120 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-16 10:47:28,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:28,121 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:28,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:28,122 INFO L225 Difference]: With dead ends: 185 [2020-10-16 10:47:28,122 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 10:47:28,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:28,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 10:47:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-16 10:47:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:47:28,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-16 10:47:28,126 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-16 10:47:28,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:28,126 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-16 10:47:28,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:28,127 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-16 10:47:28,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:28,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:28,127 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:28,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:28,337 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:28,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:28,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-16 10:47:28,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:28,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681524802] [2020-10-16 10:47:28,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:28,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681524802] [2020-10-16 10:47:28,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393196733] [2020-10-16 10:47:28,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:28,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:28,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:28,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:28,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:28,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:28,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:28,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559424901] [2020-10-16 10:47:28,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:28,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:28,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:28,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:28,589 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-16 10:47:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:28,789 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-16 10:47:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:28,790 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:28,791 INFO L225 Difference]: With dead ends: 185 [2020-10-16 10:47:28,791 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 10:47:28,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 10:47:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-16 10:47:28,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-16 10:47:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-16 10:47:28,795 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-16 10:47:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:28,795 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-16 10:47:28,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-16 10:47:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:28,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:28,796 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:28,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:28,997 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:28,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:28,998 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-16 10:47:28,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:28,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286613503] [2020-10-16 10:47:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:29,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286613503] [2020-10-16 10:47:29,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577394496] [2020-10-16 10:47:29,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:29,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:29,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:29,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:29,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:29,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:29,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:29,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559961461] [2020-10-16 10:47:29,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:29,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:29,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:29,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:29,280 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-16 10:47:29,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:29,342 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-16 10:47:29,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:47:29,343 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:29,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:29,344 INFO L225 Difference]: With dead ends: 182 [2020-10-16 10:47:29,344 INFO L226 Difference]: Without dead ends: 180 [2020-10-16 10:47:29,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:47:29,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-16 10:47:29,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-16 10:47:29,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 10:47:29,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-16 10:47:29,348 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-16 10:47:29,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:29,349 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-16 10:47:29,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:29,349 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-16 10:47:29,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:29,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:29,350 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:29,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-16 10:47:29,551 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:29,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:29,551 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-16 10:47:29,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:29,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479204345] [2020-10-16 10:47:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:29,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479204345] [2020-10-16 10:47:29,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825230427] [2020-10-16 10:47:29,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:29,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:29,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:29,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:29,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:29,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:29,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:29,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642157493] [2020-10-16 10:47:29,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:29,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:29,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:29,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:29,810 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-16 10:47:29,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:29,980 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-16 10:47:29,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:47:29,981 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:29,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:29,983 INFO L225 Difference]: With dead ends: 185 [2020-10-16 10:47:29,983 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 10:47:29,984 INFO L677 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 [2020-10-16 10:47:29,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 10:47:29,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-16 10:47:29,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:47:29,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-16 10:47:29,987 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-16 10:47:29,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:29,987 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-16 10:47:29,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:29,988 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-16 10:47:29,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:29,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:29,988 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:30,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:30,193 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:30,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:30,193 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-16 10:47:30,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:30,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380069520] [2020-10-16 10:47:30,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:30,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380069520] [2020-10-16 10:47:30,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404238454] [2020-10-16 10:47:30,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:30,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:30,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:30,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:30,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:30,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991568333] [2020-10-16 10:47:30,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:30,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:30,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:30,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:30,514 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:30,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:30,728 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-16 10:47:30,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:47:30,728 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:30,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:30,730 INFO L225 Difference]: With dead ends: 191 [2020-10-16 10:47:30,730 INFO L226 Difference]: Without dead ends: 189 [2020-10-16 10:47:30,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:30,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-16 10:47:30,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-16 10:47:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:47:30,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-16 10:47:30,734 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-16 10:47:30,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:30,735 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-16 10:47:30,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:30,735 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-16 10:47:30,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:30,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:30,735 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:30,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:30,938 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:30,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:30,938 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-16 10:47:30,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:30,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862219758] [2020-10-16 10:47:30,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:31,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862219758] [2020-10-16 10:47:31,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558832308] [2020-10-16 10:47:31,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:31,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:31,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:31,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:31,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:31,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:31,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:31,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379081941] [2020-10-16 10:47:31,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:31,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:31,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:31,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:31,180 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-16 10:47:31,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:31,409 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-16 10:47:31,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:31,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:31,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:31,411 INFO L225 Difference]: With dead ends: 187 [2020-10-16 10:47:31,411 INFO L226 Difference]: Without dead ends: 185 [2020-10-16 10:47:31,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-16 10:47:31,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-16 10:47:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:47:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-16 10:47:31,415 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-16 10:47:31,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:31,415 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-16 10:47:31,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:31,415 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-16 10:47:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:31,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:31,416 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:31,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-16 10:47:31,617 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:31,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:31,617 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-16 10:47:31,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:31,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535173935] [2020-10-16 10:47:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:31,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535173935] [2020-10-16 10:47:31,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167344991] [2020-10-16 10:47:31,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:31,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:31,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:31,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:31,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:31,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:31,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:31,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459729435] [2020-10-16 10:47:31,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:31,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:31,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:31,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:31,837 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:32,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:32,082 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-16 10:47:32,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:32,083 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:32,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:32,084 INFO L225 Difference]: With dead ends: 198 [2020-10-16 10:47:32,084 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 10:47:32,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:32,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 10:47:32,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-16 10:47:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:47:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-16 10:47:32,087 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-16 10:47:32,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:32,088 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-16 10:47:32,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:32,088 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-16 10:47:32,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:32,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:32,088 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:32,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:32,289 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:32,290 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-16 10:47:32,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:32,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812448287] [2020-10-16 10:47:32,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:32,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812448287] [2020-10-16 10:47:32,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080068571] [2020-10-16 10:47:32,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:32,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:32,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:32,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:32,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:32,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:32,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:32,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004590410] [2020-10-16 10:47:32,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:32,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:32,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:32,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:32,527 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-16 10:47:32,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:32,798 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-16 10:47:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:32,798 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:32,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:32,800 INFO L225 Difference]: With dead ends: 189 [2020-10-16 10:47:32,800 INFO L226 Difference]: Without dead ends: 187 [2020-10-16 10:47:32,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:32,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-16 10:47:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-16 10:47:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 10:47:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-16 10:47:32,803 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-16 10:47:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:32,804 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-16 10:47:32,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-16 10:47:32,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:32,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:32,804 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:33,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-16 10:47:33,005 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:33,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:33,006 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-16 10:47:33,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:33,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480420473] [2020-10-16 10:47:33,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:33,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480420473] [2020-10-16 10:47:33,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662679848] [2020-10-16 10:47:33,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:33,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:33,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:33,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:33,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:33,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:33,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:33,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424146951] [2020-10-16 10:47:33,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:33,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:33,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:33,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:33,278 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-16 10:47:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:33,363 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-16 10:47:33,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:47:33,363 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:33,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:33,365 INFO L225 Difference]: With dead ends: 178 [2020-10-16 10:47:33,365 INFO L226 Difference]: Without dead ends: 176 [2020-10-16 10:47:33,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:47:33,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-16 10:47:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-16 10:47:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:47:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-16 10:47:33,368 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-16 10:47:33,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:33,368 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-16 10:47:33,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:33,368 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-16 10:47:33,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:33,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:33,369 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:33,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:33,570 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:33,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:33,570 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-16 10:47:33,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:33,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129645382] [2020-10-16 10:47:33,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:33,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129645382] [2020-10-16 10:47:33,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580986739] [2020-10-16 10:47:33,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:33,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:33,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:33,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:33,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:33,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:33,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:33,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:33,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800834987] [2020-10-16 10:47:33,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:33,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:33,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:33,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:33,819 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-16 10:47:34,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:34,005 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-16 10:47:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:34,006 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:34,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:34,007 INFO L225 Difference]: With dead ends: 193 [2020-10-16 10:47:34,007 INFO L226 Difference]: Without dead ends: 191 [2020-10-16 10:47:34,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:47:34,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-16 10:47:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-16 10:47:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:47:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-16 10:47:34,011 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-16 10:47:34,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:34,011 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-16 10:47:34,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-16 10:47:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:34,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:34,012 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:34,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-16 10:47:34,213 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:34,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:34,213 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-16 10:47:34,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:34,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992992965] [2020-10-16 10:47:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:34,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992992965] [2020-10-16 10:47:34,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136597832] [2020-10-16 10:47:34,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:34,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:34,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:34,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:34,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:34,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648564402] [2020-10-16 10:47:34,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:34,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:34,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:34,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:34,494 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-16 10:47:34,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:34,745 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-16 10:47:34,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:34,746 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:34,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:34,748 INFO L225 Difference]: With dead ends: 195 [2020-10-16 10:47:34,748 INFO L226 Difference]: Without dead ends: 193 [2020-10-16 10:47:34,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:47:34,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-16 10:47:34,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-16 10:47:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:47:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-16 10:47:34,751 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-16 10:47:34,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:34,751 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-16 10:47:34,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-16 10:47:34,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:34,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:34,751 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:34,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:34,952 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:34,953 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-16 10:47:34,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:34,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297079306] [2020-10-16 10:47:34,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:35,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297079306] [2020-10-16 10:47:35,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947109424] [2020-10-16 10:47:35,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:35,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:35,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:35,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:35,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:35,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:35,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:35,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769652437] [2020-10-16 10:47:35,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:35,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:35,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:35,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:35,216 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-16 10:47:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:35,331 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-16 10:47:35,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:47:35,332 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:35,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:35,333 INFO L225 Difference]: With dead ends: 174 [2020-10-16 10:47:35,333 INFO L226 Difference]: Without dead ends: 172 [2020-10-16 10:47:35,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:47:35,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-16 10:47:35,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-16 10:47:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:47:35,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-16 10:47:35,337 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-16 10:47:35,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:35,337 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-16 10:47:35,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:35,338 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-16 10:47:35,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:35,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:35,338 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:35,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-16 10:47:35,539 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:35,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:35,540 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-16 10:47:35,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:35,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546784796] [2020-10-16 10:47:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:35,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546784796] [2020-10-16 10:47:35,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770286165] [2020-10-16 10:47:35,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:35,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:35,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:35,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:35,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:35,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:35,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:35,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692886860] [2020-10-16 10:47:35,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:35,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:35,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:35,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:35,773 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-16 10:47:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:36,004 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-16 10:47:36,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:36,005 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:36,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:36,006 INFO L225 Difference]: With dead ends: 189 [2020-10-16 10:47:36,006 INFO L226 Difference]: Without dead ends: 187 [2020-10-16 10:47:36,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:47:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-16 10:47:36,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-16 10:47:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:47:36,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-16 10:47:36,009 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-16 10:47:36,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:36,009 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-16 10:47:36,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:36,009 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-16 10:47:36,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:36,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:36,009 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:36,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:36,210 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:36,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:36,210 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-16 10:47:36,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:36,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752203196] [2020-10-16 10:47:36,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:36,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752203196] [2020-10-16 10:47:36,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528493351] [2020-10-16 10:47:36,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:36,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:36,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:36,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:36,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:36,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:36,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:36,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626729130] [2020-10-16 10:47:36,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:36,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:36,439 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-16 10:47:36,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:36,565 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-16 10:47:36,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:47:36,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:36,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:36,567 INFO L225 Difference]: With dead ends: 175 [2020-10-16 10:47:36,567 INFO L226 Difference]: Without dead ends: 173 [2020-10-16 10:47:36,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:47:36,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-16 10:47:36,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-16 10:47:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:47:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 10:47:36,571 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 10:47:36,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:36,571 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 10:47:36,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 10:47:36,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:36,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:36,572 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:36,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:36,780 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:36,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:36,780 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-16 10:47:36,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:36,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906076688] [2020-10-16 10:47:36,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:36,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906076688] [2020-10-16 10:47:36,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10146047] [2020-10-16 10:47:36,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:36,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:36,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:36,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:36,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:36,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:37,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:37,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:37,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393167088] [2020-10-16 10:47:37,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:37,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:37,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:37,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:37,028 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:37,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:37,341 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-16 10:47:37,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:37,341 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:37,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:37,343 INFO L225 Difference]: With dead ends: 195 [2020-10-16 10:47:37,343 INFO L226 Difference]: Without dead ends: 190 [2020-10-16 10:47:37,343 INFO L677 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 [2020-10-16 10:47:37,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-16 10:47:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-16 10:47:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:47:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-16 10:47:37,347 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-16 10:47:37,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:37,347 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-16 10:47:37,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-16 10:47:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:37,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:37,348 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:37,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:37,549 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:37,550 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-16 10:47:37,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:37,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155191361] [2020-10-16 10:47:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:37,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155191361] [2020-10-16 10:47:37,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207493173] [2020-10-16 10:47:37,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:37,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:37,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:37,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:37,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:37,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:37,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:37,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151392348] [2020-10-16 10:47:37,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:37,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:37,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:37,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:37,801 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-16 10:47:38,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:38,058 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-16 10:47:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:47:38,058 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:38,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:38,059 INFO L225 Difference]: With dead ends: 187 [2020-10-16 10:47:38,059 INFO L226 Difference]: Without dead ends: 185 [2020-10-16 10:47:38,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:38,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-16 10:47:38,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-16 10:47:38,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:47:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 10:47:38,062 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 10:47:38,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:38,063 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 10:47:38,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 10:47:38,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:38,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:38,063 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:38,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:38,264 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:38,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:38,265 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-16 10:47:38,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:38,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281003550] [2020-10-16 10:47:38,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:38,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281003550] [2020-10-16 10:47:38,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634514864] [2020-10-16 10:47:38,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:38,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:38,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:38,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:38,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:38,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:38,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806677447] [2020-10-16 10:47:38,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:38,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:38,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:38,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:38,504 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:38,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:38,937 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-16 10:47:38,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:47:38,937 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:38,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:38,939 INFO L225 Difference]: With dead ends: 212 [2020-10-16 10:47:38,939 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 10:47:38,940 INFO L677 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 [2020-10-16 10:47:38,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 10:47:38,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-16 10:47:38,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:47:38,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 10:47:38,943 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 10:47:38,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:38,944 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 10:47:38,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:38,944 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 10:47:38,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:38,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:38,945 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:39,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-16 10:47:39,148 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:39,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:39,148 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-16 10:47:39,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:39,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784643309] [2020-10-16 10:47:39,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:39,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784643309] [2020-10-16 10:47:39,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864799050] [2020-10-16 10:47:39,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:39,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:39,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:39,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:39,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:39,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:39,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:39,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:39,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442252205] [2020-10-16 10:47:39,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:39,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:39,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:39,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:39,386 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:39,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:39,690 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-16 10:47:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:39,690 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:39,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:39,692 INFO L225 Difference]: With dead ends: 202 [2020-10-16 10:47:39,692 INFO L226 Difference]: Without dead ends: 197 [2020-10-16 10:47:39,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:47:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-16 10:47:39,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-16 10:47:39,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:47:39,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-16 10:47:39,695 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-16 10:47:39,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:39,696 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-16 10:47:39,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:39,696 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-16 10:47:39,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:39,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:39,696 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:39,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:39,897 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:39,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:39,898 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-16 10:47:39,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:39,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015631079] [2020-10-16 10:47:39,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:39,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015631079] [2020-10-16 10:47:39,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939964593] [2020-10-16 10:47:39,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:40,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:40,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:40,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:40,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:40,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:40,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:40,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193642167] [2020-10-16 10:47:40,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:40,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:40,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:40,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:40,634 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-16 10:47:40,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:40,916 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-16 10:47:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:47:40,916 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:40,918 INFO L225 Difference]: With dead ends: 198 [2020-10-16 10:47:40,918 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 10:47:40,919 INFO L677 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 [2020-10-16 10:47:40,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 10:47:40,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-16 10:47:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:47:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-16 10:47:40,923 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-16 10:47:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:40,923 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-16 10:47:40,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:40,924 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-16 10:47:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:40,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:40,924 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:41,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-16 10:47:41,126 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:41,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:41,126 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-16 10:47:41,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:41,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544419139] [2020-10-16 10:47:41,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:41,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544419139] [2020-10-16 10:47:41,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229658474] [2020-10-16 10:47:41,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:41,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:41,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:41,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:41,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:41,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:41,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:41,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018871163] [2020-10-16 10:47:41,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:41,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:41,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:41,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:41,418 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-16 10:47:41,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:41,812 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-16 10:47:41,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:47:41,813 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:41,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:41,815 INFO L225 Difference]: With dead ends: 209 [2020-10-16 10:47:41,815 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 10:47:41,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:47:41,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 10:47:41,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-16 10:47:41,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:47:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 10:47:41,819 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 10:47:41,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:41,819 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 10:47:41,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:41,820 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 10:47:41,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:41,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:41,820 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:42,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 10:47:42,021 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:42,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:42,022 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-16 10:47:42,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:42,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211662249] [2020-10-16 10:47:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:42,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211662249] [2020-10-16 10:47:42,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150217414] [2020-10-16 10:47:42,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:42,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:47:42,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:42,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:42,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:42,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:42,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:42,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:42,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749268516] [2020-10-16 10:47:42,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:42,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:42,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:42,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:42,281 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 10:47:42,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:42,814 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-16 10:47:42,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:47:42,814 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:42,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:42,816 INFO L225 Difference]: With dead ends: 217 [2020-10-16 10:47:42,816 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 10:47:42,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:47:42,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 10:47:42,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-16 10:47:42,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-16 10:47:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-16 10:47:42,821 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-16 10:47:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:42,821 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-16 10:47:42,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-16 10:47:42,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:42,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:42,822 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:43,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-16 10:47:43,029 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:43,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:43,029 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-16 10:47:43,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:43,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701154851] [2020-10-16 10:47:43,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:43,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701154851] [2020-10-16 10:47:43,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247697620] [2020-10-16 10:47:43,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:43,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:43,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:43,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:45,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:45,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:45,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:45,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694655321] [2020-10-16 10:47:45,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:45,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:45,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:45,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-16 10:47:45,360 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-16 10:47:49,669 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-16 10:47:53,899 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-16 10:47:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:54,372 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-16 10:47:54,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:47:54,373 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:54,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:54,374 INFO L225 Difference]: With dead ends: 236 [2020-10-16 10:47:54,374 INFO L226 Difference]: Without dead ends: 228 [2020-10-16 10:47:54,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-16 10:47:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-16 10:47:54,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-16 10:47:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:47:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-16 10:47:54,378 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-16 10:47:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:54,378 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-16 10:47:54,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:54,378 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-16 10:47:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:54,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:54,378 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:54,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 10:47:54,580 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:54,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:54,580 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-16 10:47:54,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:54,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398249177] [2020-10-16 10:47:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:54,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398249177] [2020-10-16 10:47:54,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136850110] [2020-10-16 10:47:54,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:54,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:54,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:54,835 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:47:54,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:47:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:54,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:54,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:54,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592574363] [2020-10-16 10:47:54,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:54,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:54,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:54,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:54,870 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-10-16 10:47:55,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:55,432 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-10-16 10:47:55,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:47:55,433 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:55,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:55,435 INFO L225 Difference]: With dead ends: 219 [2020-10-16 10:47:55,435 INFO L226 Difference]: Without dead ends: 214 [2020-10-16 10:47:55,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:47:55,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-16 10:47:55,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-10-16 10:47:55,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:47:55,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-16 10:47:55,438 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-16 10:47:55,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:55,438 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-16 10:47:55,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:55,438 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-16 10:47:55,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:55,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:55,439 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:55,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:55,640 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:55,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:55,640 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-16 10:47:55,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:55,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103047363] [2020-10-16 10:47:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:55,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103047363] [2020-10-16 10:47:55,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111874964] [2020-10-16 10:47:55,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:55,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:55,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:55,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:55,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:55,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:55,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:55,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643715891] [2020-10-16 10:47:55,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:55,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:55,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:55,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:55,883 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-16 10:47:56,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:56,148 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-16 10:47:56,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:56,149 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:56,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:56,149 INFO L225 Difference]: With dead ends: 197 [2020-10-16 10:47:56,150 INFO L226 Difference]: Without dead ends: 195 [2020-10-16 10:47:56,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:56,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-16 10:47:56,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-16 10:47:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:47:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-16 10:47:56,153 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-16 10:47:56,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:56,153 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-16 10:47:56,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:56,153 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-16 10:47:56,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:56,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:56,154 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:56,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:47:56,363 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:56,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:56,363 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-16 10:47:56,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:56,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903337529] [2020-10-16 10:47:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:56,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903337529] [2020-10-16 10:47:56,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203255134] [2020-10-16 10:47:56,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:56,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:47:56,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:56,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:56,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:56,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:56,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:56,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85491312] [2020-10-16 10:47:56,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:56,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:56,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:56,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:56,621 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-16 10:47:56,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:56,898 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-16 10:47:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:56,898 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:56,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:56,899 INFO L225 Difference]: With dead ends: 202 [2020-10-16 10:47:56,899 INFO L226 Difference]: Without dead ends: 200 [2020-10-16 10:47:56,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-16 10:47:56,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-16 10:47:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:47:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-16 10:47:56,903 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-16 10:47:56,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:56,903 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-16 10:47:56,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-16 10:47:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:56,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:56,904 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:57,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-16 10:47:57,105 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:57,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:57,105 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-16 10:47:57,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:57,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564453718] [2020-10-16 10:47:57,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:57,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564453718] [2020-10-16 10:47:57,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138351946] [2020-10-16 10:47:57,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:57,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:47:57,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:57,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:57,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:57,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:57,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:57,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717581553] [2020-10-16 10:47:57,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:57,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:57,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:57,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:57,355 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-16 10:47:57,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:57,649 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-16 10:47:57,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:47:57,649 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:57,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:57,650 INFO L225 Difference]: With dead ends: 197 [2020-10-16 10:47:57,651 INFO L226 Difference]: Without dead ends: 195 [2020-10-16 10:47:57,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:47:57,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-16 10:47:57,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-16 10:47:57,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:47:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-16 10:47:57,654 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-16 10:47:57,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:57,654 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-16 10:47:57,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:57,654 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-16 10:47:57,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:57,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:57,655 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:57,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 10:47:57,856 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:57,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:57,856 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-16 10:47:57,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:57,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097014729] [2020-10-16 10:47:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:57,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097014729] [2020-10-16 10:47:57,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934585892] [2020-10-16 10:47:57,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:57,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:47:57,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:57,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:57,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:58,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:58,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:58,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898391144] [2020-10-16 10:47:58,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:58,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:58,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:58,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:58,153 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-16 10:47:58,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:58,741 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-16 10:47:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:47:58,743 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:58,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:58,744 INFO L225 Difference]: With dead ends: 214 [2020-10-16 10:47:58,744 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 10:47:58,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:47:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 10:47:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-16 10:47:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 10:47:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-16 10:47:58,750 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-16 10:47:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:58,750 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-16 10:47:58,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:58,751 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-16 10:47:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:58,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:58,752 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:47:58,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-16 10:47:58,957 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:47:58,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:47:58,958 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-16 10:47:58,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:47:58,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102863280] [2020-10-16 10:47:58,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:47:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:47:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:59,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102863280] [2020-10-16 10:47:59,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890105855] [2020-10-16 10:47:59,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:47:59,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:47:59,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:47:59,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:47:59,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:47:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:47:59,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:47:59,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:47:59,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570331897] [2020-10-16 10:47:59,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:47:59,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:47:59,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:47:59,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:47:59,327 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-16 10:47:59,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:47:59,868 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-16 10:47:59,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:47:59,869 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:47:59,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:47:59,870 INFO L225 Difference]: With dead ends: 217 [2020-10-16 10:47:59,870 INFO L226 Difference]: Without dead ends: 215 [2020-10-16 10:47:59,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:47:59,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-16 10:47:59,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-16 10:47:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:47:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-16 10:47:59,874 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-16 10:47:59,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:47:59,874 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-16 10:47:59,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:47:59,874 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-16 10:47:59,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:47:59,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:47:59,875 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:00,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:00,082 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:00,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:00,083 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-16 10:48:00,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:00,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989274564] [2020-10-16 10:48:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:00,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989274564] [2020-10-16 10:48:00,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314434098] [2020-10-16 10:48:00,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:00,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:00,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:00,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:00,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:00,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996113927] [2020-10-16 10:48:00,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:00,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:00,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:00,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:00,346 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-16 10:48:00,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:00,767 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-16 10:48:00,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:48:00,768 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:00,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:00,769 INFO L225 Difference]: With dead ends: 211 [2020-10-16 10:48:00,769 INFO L226 Difference]: Without dead ends: 209 [2020-10-16 10:48:00,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:48:00,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-16 10:48:00,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-16 10:48:00,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 10:48:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 10:48:00,772 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 10:48:00,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:00,773 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 10:48:00,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 10:48:00,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:00,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:00,773 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:00,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:00,974 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:00,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:00,975 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-16 10:48:00,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:00,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585201700] [2020-10-16 10:48:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:01,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585201700] [2020-10-16 10:48:01,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861121325] [2020-10-16 10:48:01,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:01,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:48:01,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:01,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:01,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:01,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:48:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:01,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:01,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:01,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143561051] [2020-10-16 10:48:01,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:01,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:01,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:01,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:01,207 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 10:48:01,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:01,706 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-16 10:48:01,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:48:01,707 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:01,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:01,708 INFO L225 Difference]: With dead ends: 211 [2020-10-16 10:48:01,708 INFO L226 Difference]: Without dead ends: 206 [2020-10-16 10:48:01,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:48:01,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-16 10:48:01,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-16 10:48:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 10:48:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 10:48:01,711 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 10:48:01,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:01,712 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 10:48:01,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:01,712 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 10:48:01,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:01,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:01,712 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:01,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 10:48:01,913 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:01,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:01,914 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-16 10:48:01,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:01,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857095100] [2020-10-16 10:48:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:01,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857095100] [2020-10-16 10:48:01,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099282257] [2020-10-16 10:48:01,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:02,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:48:02,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:02,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:02,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:02,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:48:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:02,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:02,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:02,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136257807] [2020-10-16 10:48:02,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:02,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:02,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:02,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:02,181 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 10:48:02,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:02,794 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-16 10:48:02,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:48:02,795 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:02,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:02,796 INFO L225 Difference]: With dead ends: 227 [2020-10-16 10:48:02,796 INFO L226 Difference]: Without dead ends: 222 [2020-10-16 10:48:02,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:48:02,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-16 10:48:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-16 10:48:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 10:48:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-16 10:48:02,799 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-16 10:48:02,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:02,799 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-16 10:48:02,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:02,799 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-16 10:48:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:02,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:02,800 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:03,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-16 10:48:03,006 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:03,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:03,006 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-16 10:48:03,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:03,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969611224] [2020-10-16 10:48:03,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:03,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969611224] [2020-10-16 10:48:03,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410614761] [2020-10-16 10:48:03,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:03,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:48:03,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:03,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:03,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:03,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:03,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:03,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552284763] [2020-10-16 10:48:03,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:03,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:03,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:03,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:03,250 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-16 10:48:03,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:03,735 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-16 10:48:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:48:03,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:03,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:03,736 INFO L225 Difference]: With dead ends: 221 [2020-10-16 10:48:03,736 INFO L226 Difference]: Without dead ends: 219 [2020-10-16 10:48:03,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:48:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-16 10:48:03,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-16 10:48:03,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 10:48:03,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 10:48:03,741 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 10:48:03,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:03,741 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 10:48:03,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:03,741 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 10:48:03,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:03,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:03,742 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:03,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:03,946 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:03,946 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-16 10:48:03,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:03,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353854727] [2020-10-16 10:48:03,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:04,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353854727] [2020-10-16 10:48:04,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782187083] [2020-10-16 10:48:04,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:04,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:48:04,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:04,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:04,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:04,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:48:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:04,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:04,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:04,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355750365] [2020-10-16 10:48:04,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:04,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:04,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:04,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:04,182 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 10:48:04,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:04,799 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-16 10:48:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:48:04,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:04,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:04,800 INFO L225 Difference]: With dead ends: 240 [2020-10-16 10:48:04,800 INFO L226 Difference]: Without dead ends: 232 [2020-10-16 10:48:04,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:48:04,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-16 10:48:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-16 10:48:04,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-16 10:48:04,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-16 10:48:04,804 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-16 10:48:04,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:04,804 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-16 10:48:04,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:04,804 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-16 10:48:04,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:04,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:04,805 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:05,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 10:48:05,006 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:05,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:05,006 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-16 10:48:05,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:05,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71097327] [2020-10-16 10:48:05,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:05,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71097327] [2020-10-16 10:48:05,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375088042] [2020-10-16 10:48:05,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:05,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:48:05,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:05,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:05,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:05,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:48:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:05,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:05,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:05,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11296805] [2020-10-16 10:48:05,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:05,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:05,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:05,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:05,298 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-16 10:48:06,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:06,072 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-16 10:48:06,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:48:06,073 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:06,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:06,075 INFO L225 Difference]: With dead ends: 238 [2020-10-16 10:48:06,075 INFO L226 Difference]: Without dead ends: 230 [2020-10-16 10:48:06,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:48:06,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-16 10:48:06,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-16 10:48:06,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:48:06,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-16 10:48:06,081 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-16 10:48:06,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:06,081 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-16 10:48:06,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:06,082 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-16 10:48:06,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:06,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:06,083 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:06,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:06,296 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:06,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:06,297 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-16 10:48:06,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:06,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637566165] [2020-10-16 10:48:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:06,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637566165] [2020-10-16 10:48:06,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092110673] [2020-10-16 10:48:06,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:06,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:06,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:06,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:06,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:06,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559238356] [2020-10-16 10:48:06,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:06,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:06,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:06,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:06,541 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-16 10:48:06,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:06,806 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-16 10:48:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:48:06,806 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:06,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:06,807 INFO L225 Difference]: With dead ends: 195 [2020-10-16 10:48:06,807 INFO L226 Difference]: Without dead ends: 193 [2020-10-16 10:48:06,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:48:06,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-16 10:48:06,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-16 10:48:06,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:48:06,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-16 10:48:06,810 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-16 10:48:06,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:06,810 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-16 10:48:06,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:06,811 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-16 10:48:06,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:06,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:06,812 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:07,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-16 10:48:07,021 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:07,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:07,021 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-16 10:48:07,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:07,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648177594] [2020-10-16 10:48:07,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:07,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648177594] [2020-10-16 10:48:07,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826839239] [2020-10-16 10:48:07,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:07,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:48:07,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:07,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:07,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:07,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:07,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:07,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783440539] [2020-10-16 10:48:07,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:07,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:07,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:07,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:07,284 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-16 10:48:07,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:07,783 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-16 10:48:07,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:48:07,783 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:07,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:07,784 INFO L225 Difference]: With dead ends: 206 [2020-10-16 10:48:07,784 INFO L226 Difference]: Without dead ends: 204 [2020-10-16 10:48:07,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:48:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-16 10:48:07,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-16 10:48:07,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 10:48:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-16 10:48:07,787 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-16 10:48:07,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:07,787 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-16 10:48:07,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-16 10:48:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:07,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:07,788 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:07,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:07,989 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:07,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:07,989 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-16 10:48:07,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:07,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753523785] [2020-10-16 10:48:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:08,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753523785] [2020-10-16 10:48:08,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882440850] [2020-10-16 10:48:08,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:08,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:48:08,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:08,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:08,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:08,235 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:48:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:08,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:08,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:08,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539508144] [2020-10-16 10:48:08,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:08,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:08,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:08,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:08,258 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 15 states. [2020-10-16 10:48:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:08,883 INFO L93 Difference]: Finished difference Result 224 states and 535 transitions. [2020-10-16 10:48:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:48:08,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:08,885 INFO L225 Difference]: With dead ends: 224 [2020-10-16 10:48:08,885 INFO L226 Difference]: Without dead ends: 219 [2020-10-16 10:48:08,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=270, Invalid=660, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:48:08,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-16 10:48:08,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 139. [2020-10-16 10:48:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 10:48:08,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-16 10:48:08,890 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-16 10:48:08,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:08,890 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-16 10:48:08,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:08,890 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-16 10:48:08,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:08,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:08,891 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:09,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-16 10:48:09,100 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:09,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:09,100 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-16 10:48:09,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:09,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532047603] [2020-10-16 10:48:09,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:09,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532047603] [2020-10-16 10:48:09,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386984492] [2020-10-16 10:48:09,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:09,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:48:09,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:09,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:09,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:09,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:09,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:09,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544259284] [2020-10-16 10:48:09,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:09,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:09,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:09,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:09,367 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-16 10:48:09,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:09,594 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-16 10:48:09,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:48:09,595 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:09,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:09,595 INFO L225 Difference]: With dead ends: 194 [2020-10-16 10:48:09,596 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 10:48:09,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:48:09,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 10:48:09,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-16 10:48:09,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:48:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-16 10:48:09,599 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-16 10:48:09,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:09,599 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-16 10:48:09,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:09,599 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-16 10:48:09,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:09,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:09,600 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:09,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:09,801 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:09,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:09,801 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-16 10:48:09,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:09,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368218790] [2020-10-16 10:48:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:09,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368218790] [2020-10-16 10:48:09,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078523848] [2020-10-16 10:48:09,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:09,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:48:09,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:09,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:09,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:10,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:10,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:10,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557479288] [2020-10-16 10:48:10,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:10,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:10,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:10,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:10,069 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-16 10:48:10,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:10,375 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-16 10:48:10,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:48:10,376 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:10,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:10,377 INFO L225 Difference]: With dead ends: 205 [2020-10-16 10:48:10,377 INFO L226 Difference]: Without dead ends: 203 [2020-10-16 10:48:10,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:48:10,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-16 10:48:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-16 10:48:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:48:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-16 10:48:10,381 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-16 10:48:10,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:10,382 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-16 10:48:10,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:10,382 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-16 10:48:10,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:10,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:10,382 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:10,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:10,591 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:10,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:10,591 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-16 10:48:10,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:10,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337776172] [2020-10-16 10:48:10,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:10,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337776172] [2020-10-16 10:48:10,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871176967] [2020-10-16 10:48:10,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:10,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:48:10,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:10,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:10,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:10,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:10,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:10,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743564231] [2020-10-16 10:48:10,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:10,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:10,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:10,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:10,852 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-16 10:48:11,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:11,128 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-16 10:48:11,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:48:11,128 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:11,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:11,129 INFO L225 Difference]: With dead ends: 201 [2020-10-16 10:48:11,129 INFO L226 Difference]: Without dead ends: 199 [2020-10-16 10:48:11,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:48:11,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-16 10:48:11,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-16 10:48:11,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 10:48:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-16 10:48:11,133 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-16 10:48:11,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:11,133 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-16 10:48:11,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:11,133 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-16 10:48:11,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:11,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:11,134 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:11,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:11,335 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:11,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:11,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-16 10:48:11,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:11,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925960132] [2020-10-16 10:48:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:11,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925960132] [2020-10-16 10:48:11,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121076614] [2020-10-16 10:48:11,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:11,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:11,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:11,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:11,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:11,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137519750] [2020-10-16 10:48:11,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:11,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:11,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:11,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:11,616 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-16 10:48:11,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:11,823 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-16 10:48:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:48:11,824 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:11,825 INFO L225 Difference]: With dead ends: 194 [2020-10-16 10:48:11,825 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 10:48:11,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:48:11,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 10:48:11,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-16 10:48:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:48:11,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-16 10:48:11,828 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-16 10:48:11,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:11,829 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-16 10:48:11,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:11,829 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-16 10:48:11,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:11,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:11,830 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:12,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-16 10:48:12,038 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:12,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:12,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-16 10:48:12,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:12,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702043667] [2020-10-16 10:48:12,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:12,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702043667] [2020-10-16 10:48:12,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154608026] [2020-10-16 10:48:12,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:12,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:48:12,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:12,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:12,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:12,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:12,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:12,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352128419] [2020-10-16 10:48:12,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:12,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:12,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:12,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:12,317 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-16 10:48:12,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:12,658 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-16 10:48:12,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:48:12,659 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:12,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:12,660 INFO L225 Difference]: With dead ends: 209 [2020-10-16 10:48:12,660 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 10:48:12,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:48:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 10:48:12,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-16 10:48:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 10:48:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-16 10:48:12,664 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-16 10:48:12,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:12,664 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-16 10:48:12,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:12,664 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-16 10:48:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:12,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:12,665 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:12,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:12,870 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:12,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:12,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-16 10:48:12,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:12,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962267960] [2020-10-16 10:48:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:12,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962267960] [2020-10-16 10:48:12,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198892500] [2020-10-16 10:48:12,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:12,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:48:12,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:12,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:12,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:13,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:13,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:13,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909403945] [2020-10-16 10:48:13,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:13,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:13,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:13,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:13,126 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-16 10:48:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:13,451 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-16 10:48:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:48:13,452 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:13,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:13,452 INFO L225 Difference]: With dead ends: 202 [2020-10-16 10:48:13,452 INFO L226 Difference]: Without dead ends: 200 [2020-10-16 10:48:13,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:48:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-16 10:48:13,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-16 10:48:13,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 10:48:13,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-16 10:48:13,456 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-16 10:48:13,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:13,456 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-16 10:48:13,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:13,456 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-16 10:48:13,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:13,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:13,456 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:13,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-16 10:48:13,657 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:13,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:13,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-16 10:48:13,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:13,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418828640] [2020-10-16 10:48:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:13,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418828640] [2020-10-16 10:48:13,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372012067] [2020-10-16 10:48:13,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:13,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:48:13,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:13,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:13,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:13,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:13,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:13,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227530717] [2020-10-16 10:48:13,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:13,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:13,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:13,905 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-16 10:48:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:14,225 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-16 10:48:14,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:48:14,226 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:14,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:14,227 INFO L225 Difference]: With dead ends: 201 [2020-10-16 10:48:14,227 INFO L226 Difference]: Without dead ends: 199 [2020-10-16 10:48:14,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:48:14,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-16 10:48:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-16 10:48:14,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 10:48:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-16 10:48:14,230 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-16 10:48:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:14,230 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-16 10:48:14,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:14,230 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-16 10:48:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:14,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:14,231 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:14,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 10:48:14,432 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:14,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-16 10:48:14,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:14,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141871184] [2020-10-16 10:48:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:14,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141871184] [2020-10-16 10:48:14,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273228804] [2020-10-16 10:48:14,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:14,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:48:14,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:14,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:14,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:14,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:14,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:14,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416421701] [2020-10-16 10:48:14,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:14,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:14,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:14,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:14,697 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-16 10:48:15,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:15,157 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-16 10:48:15,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:48:15,158 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:15,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:15,158 INFO L225 Difference]: With dead ends: 215 [2020-10-16 10:48:15,158 INFO L226 Difference]: Without dead ends: 213 [2020-10-16 10:48:15,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:48:15,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-16 10:48:15,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-16 10:48:15,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:48:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-16 10:48:15,163 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-16 10:48:15,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:15,163 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-16 10:48:15,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-16 10:48:15,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:15,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:15,164 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:15,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:15,368 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:15,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:15,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-16 10:48:15,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:15,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286822238] [2020-10-16 10:48:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:15,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286822238] [2020-10-16 10:48:15,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008568871] [2020-10-16 10:48:15,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:15,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:48:15,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:15,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:15,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:15,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:15,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:15,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241626086] [2020-10-16 10:48:15,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:15,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:15,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:15,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:15,624 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-16 10:48:16,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:16,013 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-16 10:48:16,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:48:16,014 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:16,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:16,015 INFO L225 Difference]: With dead ends: 196 [2020-10-16 10:48:16,015 INFO L226 Difference]: Without dead ends: 194 [2020-10-16 10:48:16,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:48:16,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-16 10:48:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-16 10:48:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 10:48:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 10:48:16,020 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 10:48:16,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:16,020 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 10:48:16,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:16,020 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 10:48:16,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:16,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:16,021 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:16,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:16,224 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:16,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:16,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-16 10:48:16,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:16,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901910997] [2020-10-16 10:48:16,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:16,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901910997] [2020-10-16 10:48:16,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653318085] [2020-10-16 10:48:16,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:16,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:16,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:16,446 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:48:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:16,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:16,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:16,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532228582] [2020-10-16 10:48:16,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:16,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:16,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:16,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:16,458 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 10:48:16,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:16,837 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-16 10:48:16,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:48:16,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:16,840 INFO L225 Difference]: With dead ends: 191 [2020-10-16 10:48:16,840 INFO L226 Difference]: Without dead ends: 186 [2020-10-16 10:48:16,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:48:16,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-16 10:48:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-16 10:48:16,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 10:48:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 10:48:16,846 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 10:48:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:16,847 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 10:48:16,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 10:48:16,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:16,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:16,848 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:17,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-16 10:48:17,062 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:17,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:17,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-16 10:48:17,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:17,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437555170] [2020-10-16 10:48:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:17,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437555170] [2020-10-16 10:48:17,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937613626] [2020-10-16 10:48:17,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:17,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:48:17,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:17,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:17,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:17,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:48:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:17,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:17,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:17,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207943453] [2020-10-16 10:48:17,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:17,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:17,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:17,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:17,376 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 10:48:18,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:18,091 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-16 10:48:18,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:48:18,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:18,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:18,093 INFO L225 Difference]: With dead ends: 232 [2020-10-16 10:48:18,093 INFO L226 Difference]: Without dead ends: 227 [2020-10-16 10:48:18,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:48:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-16 10:48:18,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-16 10:48:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 10:48:18,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-16 10:48:18,097 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-16 10:48:18,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:18,098 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-16 10:48:18,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:18,098 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-16 10:48:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:18,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:18,098 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:18,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:18,307 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:18,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:18,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-16 10:48:18,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:18,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841448058] [2020-10-16 10:48:18,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:18,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841448058] [2020-10-16 10:48:18,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3380884] [2020-10-16 10:48:18,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:18,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:48:18,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:18,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:48:18,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:18,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:18,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:18,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701794613] [2020-10-16 10:48:18,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:18,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:18,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:18,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:18,544 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-16 10:48:19,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:19,245 INFO L93 Difference]: Finished difference Result 243 states and 560 transitions. [2020-10-16 10:48:19,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:48:19,246 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:19,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:19,247 INFO L225 Difference]: With dead ends: 243 [2020-10-16 10:48:19,247 INFO L226 Difference]: Without dead ends: 239 [2020-10-16 10:48:19,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:48:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-16 10:48:19,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 144. [2020-10-16 10:48:19,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 10:48:19,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 10:48:19,250 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 10:48:19,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:19,251 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 10:48:19,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:19,251 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 10:48:19,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:19,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:19,251 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:19,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:19,452 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:19,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:19,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-16 10:48:19,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:19,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811470294] [2020-10-16 10:48:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:19,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811470294] [2020-10-16 10:48:19,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72032282] [2020-10-16 10:48:19,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:19,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:48:19,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:19,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:19,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:19,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:48:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:19,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:19,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:19,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033089285] [2020-10-16 10:48:19,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:19,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:19,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:19,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:19,736 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 10:48:20,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:20,509 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-16 10:48:20,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:48:20,509 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:20,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:20,510 INFO L225 Difference]: With dead ends: 254 [2020-10-16 10:48:20,510 INFO L226 Difference]: Without dead ends: 246 [2020-10-16 10:48:20,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:48:20,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-16 10:48:20,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-16 10:48:20,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-16 10:48:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-16 10:48:20,515 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-16 10:48:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:20,515 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-16 10:48:20,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-16 10:48:20,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:20,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:20,516 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:20,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:20,724 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:20,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:20,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-16 10:48:20,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:20,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259175786] [2020-10-16 10:48:20,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:20,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259175786] [2020-10-16 10:48:20,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57250077] [2020-10-16 10:48:20,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:20,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:48:20,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:20,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:20,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:20,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:48:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:20,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:20,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:20,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413844325] [2020-10-16 10:48:20,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:20,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:20,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:20,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:20,993 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-16 10:48:21,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:21,774 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-16 10:48:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:48:21,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:21,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:21,775 INFO L225 Difference]: With dead ends: 246 [2020-10-16 10:48:21,775 INFO L226 Difference]: Without dead ends: 238 [2020-10-16 10:48:21,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:48:21,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-16 10:48:21,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-16 10:48:21,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 10:48:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-16 10:48:21,780 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-16 10:48:21,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:21,780 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-16 10:48:21,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:21,780 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-16 10:48:21,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:21,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:21,781 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:21,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-16 10:48:21,990 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:21,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:21,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-16 10:48:21,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:21,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155332557] [2020-10-16 10:48:21,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:22,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155332557] [2020-10-16 10:48:22,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119739577] [2020-10-16 10:48:22,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:22,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:48:22,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:22,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:22,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:22,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:22,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:22,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293791665] [2020-10-16 10:48:22,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:22,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:22,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:22,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:22,253 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-16 10:48:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:22,681 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-16 10:48:22,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:48:22,681 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:22,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:22,682 INFO L225 Difference]: With dead ends: 208 [2020-10-16 10:48:22,682 INFO L226 Difference]: Without dead ends: 206 [2020-10-16 10:48:22,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:48:22,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-16 10:48:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-16 10:48:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 10:48:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-16 10:48:22,686 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-16 10:48:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:22,686 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-16 10:48:22,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:22,686 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-16 10:48:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:22,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:22,687 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:22,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 10:48:22,895 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:22,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:22,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-16 10:48:22,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:22,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141649437] [2020-10-16 10:48:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:22,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141649437] [2020-10-16 10:48:22,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985437139] [2020-10-16 10:48:22,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:23,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:23,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:23,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:23,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:23,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172759612] [2020-10-16 10:48:23,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:23,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:23,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:23,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:23,146 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-16 10:48:23,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:23,675 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-16 10:48:23,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:48:23,675 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:23,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:23,676 INFO L225 Difference]: With dead ends: 215 [2020-10-16 10:48:23,676 INFO L226 Difference]: Without dead ends: 213 [2020-10-16 10:48:23,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:48:23,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-16 10:48:23,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-16 10:48:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 10:48:23,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-16 10:48:23,680 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-16 10:48:23,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:23,681 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-16 10:48:23,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:23,681 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-16 10:48:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:23,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:23,681 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:23,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-16 10:48:23,886 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:23,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:23,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-16 10:48:23,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:23,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441915490] [2020-10-16 10:48:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:23,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441915490] [2020-10-16 10:48:23,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832326956] [2020-10-16 10:48:23,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:24,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:48:24,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:24,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:24,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:24,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:48:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:24,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:24,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:24,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638991196] [2020-10-16 10:48:24,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:24,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:24,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:24,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:24,137 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-16 10:48:24,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:24,718 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-16 10:48:24,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:48:24,719 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:24,720 INFO L225 Difference]: With dead ends: 236 [2020-10-16 10:48:24,720 INFO L226 Difference]: Without dead ends: 228 [2020-10-16 10:48:24,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:48:24,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-16 10:48:24,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-16 10:48:24,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 10:48:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-16 10:48:24,724 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-16 10:48:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:24,724 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-16 10:48:24,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-16 10:48:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:24,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:24,724 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:24,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 10:48:24,925 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:24,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:24,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-16 10:48:24,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:24,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470085465] [2020-10-16 10:48:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:25,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470085465] [2020-10-16 10:48:25,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900253920] [2020-10-16 10:48:25,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:25,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:48:25,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:25,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:25,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:25,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:48:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:25,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:25,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:25,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670949872] [2020-10-16 10:48:25,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:25,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:25,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:25,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:25,174 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-16 10:48:25,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:25,798 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-16 10:48:25,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:48:25,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:25,800 INFO L225 Difference]: With dead ends: 241 [2020-10-16 10:48:25,800 INFO L226 Difference]: Without dead ends: 233 [2020-10-16 10:48:25,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:48:25,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-16 10:48:25,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-16 10:48:25,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-16 10:48:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-16 10:48:25,805 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-16 10:48:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:25,805 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-16 10:48:25,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:25,805 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-16 10:48:25,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:25,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:25,806 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:26,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-16 10:48:26,016 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:26,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:26,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-16 10:48:26,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:26,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213347610] [2020-10-16 10:48:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:26,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213347610] [2020-10-16 10:48:26,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104118575] [2020-10-16 10:48:26,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:26,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:48:26,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:26,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:48:26,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:26,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:48:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:26,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:26,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 10:48:26,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184079220] [2020-10-16 10:48:26,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:48:26,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:26,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:48:26,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:48:26,263 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-16 10:48:26,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:26,861 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-16 10:48:26,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:48:26,861 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 10:48:26,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:26,863 INFO L225 Difference]: With dead ends: 232 [2020-10-16 10:48:26,863 INFO L226 Difference]: Without dead ends: 224 [2020-10-16 10:48:26,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:48:26,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-16 10:48:26,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-16 10:48:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-16 10:48:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-16 10:48:26,867 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-16 10:48:26,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:26,867 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-16 10:48:26,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:48:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-16 10:48:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:26,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:26,867 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:27,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:27,068 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:27,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-16 10:48:27,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:27,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118801103] [2020-10-16 10:48:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:27,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118801103] [2020-10-16 10:48:27,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724779302] [2020-10-16 10:48:27,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:27,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 10:48:27,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:48:27,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:27,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 10:48:27,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-10-16 10:48:27,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814151790] [2020-10-16 10:48:27,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:48:27,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:27,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:48:27,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:48:27,320 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 8 states. [2020-10-16 10:48:27,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:27,344 INFO L93 Difference]: Finished difference Result 195 states and 513 transitions. [2020-10-16 10:48:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:48:27,345 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-16 10:48:27,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:27,345 INFO L225 Difference]: With dead ends: 195 [2020-10-16 10:48:27,346 INFO L226 Difference]: Without dead ends: 188 [2020-10-16 10:48:27,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:48:27,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-16 10:48:27,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-10-16 10:48:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-16 10:48:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 500 transitions. [2020-10-16 10:48:27,349 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 500 transitions. Word has length 13 [2020-10-16 10:48:27,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:27,349 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 500 transitions. [2020-10-16 10:48:27,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:48:27,349 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 500 transitions. [2020-10-16 10:48:27,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:27,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:27,350 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:27,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-16 10:48:27,550 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:27,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-16 10:48:27,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:27,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816059724] [2020-10-16 10:48:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:27,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816059724] [2020-10-16 10:48:27,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170797127] [2020-10-16 10:48:27,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:27,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:48:27,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:27,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:27,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:28,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:28,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:28,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008618676] [2020-10-16 10:48:28,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:28,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:28,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:28,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:28,080 INFO L87 Difference]: Start difference. First operand 188 states and 500 transitions. Second operand 17 states. [2020-10-16 10:48:28,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:28,159 INFO L93 Difference]: Finished difference Result 249 states and 638 transitions. [2020-10-16 10:48:28,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:48:28,160 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 10:48:28,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:28,162 INFO L225 Difference]: With dead ends: 249 [2020-10-16 10:48:28,162 INFO L226 Difference]: Without dead ends: 241 [2020-10-16 10:48:28,162 INFO L677 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 [2020-10-16 10:48:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-16 10:48:28,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 197. [2020-10-16 10:48:28,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-16 10:48:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 521 transitions. [2020-10-16 10:48:28,168 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 521 transitions. Word has length 13 [2020-10-16 10:48:28,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:28,169 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 521 transitions. [2020-10-16 10:48:28,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 521 transitions. [2020-10-16 10:48:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:48:28,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:28,170 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:28,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 10:48:28,384 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:28,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:28,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-16 10:48:28,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:28,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103703030] [2020-10-16 10:48:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:28,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103703030] [2020-10-16 10:48:28,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303091608] [2020-10-16 10:48:28,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:28,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:48:28,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:28,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:48:28,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:28,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 10:48:28,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-10-16 10:48:28,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423746287] [2020-10-16 10:48:28,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:48:28,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:28,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:48:28,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:48:28,658 INFO L87 Difference]: Start difference. First operand 197 states and 521 transitions. Second operand 8 states. [2020-10-16 10:48:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:28,686 INFO L93 Difference]: Finished difference Result 278 states and 705 transitions. [2020-10-16 10:48:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:48:28,687 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-16 10:48:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:28,688 INFO L225 Difference]: With dead ends: 278 [2020-10-16 10:48:28,688 INFO L226 Difference]: Without dead ends: 248 [2020-10-16 10:48:28,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:48:28,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-16 10:48:28,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2020-10-16 10:48:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-16 10:48:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 626 transitions. [2020-10-16 10:48:28,692 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 626 transitions. Word has length 13 [2020-10-16 10:48:28,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:28,692 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 626 transitions. [2020-10-16 10:48:28,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:48:28,692 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 626 transitions. [2020-10-16 10:48:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:28,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:28,692 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:28,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:28,902 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:28,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:28,902 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-16 10:48:28,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:28,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833786361] [2020-10-16 10:48:28,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:29,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833786361] [2020-10-16 10:48:29,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377985632] [2020-10-16 10:48:29,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:29,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:48:29,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:29,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:29,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:29,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:29,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:29,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220665966] [2020-10-16 10:48:29,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:29,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:29,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:29,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:29,244 INFO L87 Difference]: Start difference. First operand 240 states and 626 transitions. Second operand 17 states. [2020-10-16 10:48:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:29,311 INFO L93 Difference]: Finished difference Result 275 states and 692 transitions. [2020-10-16 10:48:29,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:48:29,312 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:29,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:29,313 INFO L225 Difference]: With dead ends: 275 [2020-10-16 10:48:29,313 INFO L226 Difference]: Without dead ends: 273 [2020-10-16 10:48:29,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:29,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-16 10:48:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 250. [2020-10-16 10:48:29,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-16 10:48:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2020-10-16 10:48:29,316 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 14 [2020-10-16 10:48:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:29,316 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2020-10-16 10:48:29,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:29,317 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2020-10-16 10:48:29,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:29,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:29,317 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:29,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:29,518 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:29,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:29,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-16 10:48:29,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:29,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262945830] [2020-10-16 10:48:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:29,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262945830] [2020-10-16 10:48:29,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004932808] [2020-10-16 10:48:29,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:29,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:48:29,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:29,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:29,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:29,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:29,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:29,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409866990] [2020-10-16 10:48:29,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:29,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:29,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:29,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:29,856 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand 17 states. [2020-10-16 10:48:30,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:30,099 INFO L93 Difference]: Finished difference Result 295 states and 735 transitions. [2020-10-16 10:48:30,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:48:30,100 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:30,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:30,101 INFO L225 Difference]: With dead ends: 295 [2020-10-16 10:48:30,102 INFO L226 Difference]: Without dead ends: 292 [2020-10-16 10:48:30,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:48:30,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-16 10:48:30,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 251. [2020-10-16 10:48:30,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-16 10:48:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 657 transitions. [2020-10-16 10:48:30,108 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 657 transitions. Word has length 14 [2020-10-16 10:48:30,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:30,108 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 657 transitions. [2020-10-16 10:48:30,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:30,108 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 657 transitions. [2020-10-16 10:48:30,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:30,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:30,109 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:30,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:30,320 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:30,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:30,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-16 10:48:30,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:30,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618114345] [2020-10-16 10:48:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:30,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618114345] [2020-10-16 10:48:30,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648529888] [2020-10-16 10:48:30,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:30,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:30,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:30,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:30,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:30,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598431996] [2020-10-16 10:48:30,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:30,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:30,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:30,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:30,699 INFO L87 Difference]: Start difference. First operand 251 states and 657 transitions. Second operand 17 states. [2020-10-16 10:48:30,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:30,977 INFO L93 Difference]: Finished difference Result 320 states and 793 transitions. [2020-10-16 10:48:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:48:30,978 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:30,979 INFO L225 Difference]: With dead ends: 320 [2020-10-16 10:48:30,979 INFO L226 Difference]: Without dead ends: 316 [2020-10-16 10:48:30,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:48:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-16 10:48:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 253. [2020-10-16 10:48:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-16 10:48:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 663 transitions. [2020-10-16 10:48:30,985 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 663 transitions. Word has length 14 [2020-10-16 10:48:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:30,985 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 663 transitions. [2020-10-16 10:48:30,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 663 transitions. [2020-10-16 10:48:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:30,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:30,986 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:31,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:31,197 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:31,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:31,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-16 10:48:31,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:31,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963656468] [2020-10-16 10:48:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:31,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963656468] [2020-10-16 10:48:31,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006876127] [2020-10-16 10:48:31,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:31,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:48:31,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:31,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:31,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:31,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:31,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:31,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58697518] [2020-10-16 10:48:31,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:31,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:31,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:31,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:31,605 INFO L87 Difference]: Start difference. First operand 253 states and 663 transitions. Second operand 17 states. [2020-10-16 10:48:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:31,928 INFO L93 Difference]: Finished difference Result 316 states and 781 transitions. [2020-10-16 10:48:31,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:48:31,929 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:31,930 INFO L225 Difference]: With dead ends: 316 [2020-10-16 10:48:31,930 INFO L226 Difference]: Without dead ends: 313 [2020-10-16 10:48:31,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:48:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-16 10:48:31,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 255. [2020-10-16 10:48:31,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-16 10:48:31,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 669 transitions. [2020-10-16 10:48:31,935 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 669 transitions. Word has length 14 [2020-10-16 10:48:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:31,936 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 669 transitions. [2020-10-16 10:48:31,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:31,936 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 669 transitions. [2020-10-16 10:48:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:31,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:31,936 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:32,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-16 10:48:32,138 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:32,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:32,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-16 10:48:32,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:32,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778102044] [2020-10-16 10:48:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:32,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778102044] [2020-10-16 10:48:32,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697398933] [2020-10-16 10:48:32,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:32,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:48:32,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:32,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:32,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:35,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:35,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:35,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705028308] [2020-10-16 10:48:35,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:35,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:35,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:35,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-16 10:48:35,921 INFO L87 Difference]: Start difference. First operand 255 states and 669 transitions. Second operand 17 states. [2020-10-16 10:48:40,128 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 10:48:40,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:40,367 INFO L93 Difference]: Finished difference Result 342 states and 843 transitions. [2020-10-16 10:48:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:48:40,368 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:40,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:40,369 INFO L225 Difference]: With dead ends: 342 [2020-10-16 10:48:40,369 INFO L226 Difference]: Without dead ends: 337 [2020-10-16 10:48:40,369 INFO L677 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 [2020-10-16 10:48:40,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-16 10:48:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 256. [2020-10-16 10:48:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-16 10:48:40,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-10-16 10:48:40,374 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-10-16 10:48:40,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:40,375 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-10-16 10:48:40,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:40,375 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-10-16 10:48:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:40,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:40,375 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:40,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 10:48:40,578 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:40,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:40,578 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-16 10:48:40,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:40,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684630211] [2020-10-16 10:48:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:40,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684630211] [2020-10-16 10:48:40,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099987916] [2020-10-16 10:48:40,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:40,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:48:40,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:40,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:40,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:40,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:40,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:40,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977439769] [2020-10-16 10:48:40,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:40,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:40,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:40,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:40,995 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-10-16 10:48:41,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:41,334 INFO L93 Difference]: Finished difference Result 331 states and 819 transitions. [2020-10-16 10:48:41,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:48:41,335 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:41,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:41,336 INFO L225 Difference]: With dead ends: 331 [2020-10-16 10:48:41,336 INFO L226 Difference]: Without dead ends: 327 [2020-10-16 10:48:41,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:48:41,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-16 10:48:41,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 256. [2020-10-16 10:48:41,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-16 10:48:41,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-10-16 10:48:41,344 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-10-16 10:48:41,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:41,344 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-10-16 10:48:41,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-10-16 10:48:41,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:41,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:41,345 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:41,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 10:48:41,545 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:41,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:41,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-16 10:48:41,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:41,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767830461] [2020-10-16 10:48:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:41,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767830461] [2020-10-16 10:48:41,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909228346] [2020-10-16 10:48:41,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:41,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:48:41,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:41,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:41,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:41,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:41,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:41,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899975155] [2020-10-16 10:48:41,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:41,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:41,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:41,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:41,902 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-10-16 10:48:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:42,243 INFO L93 Difference]: Finished difference Result 321 states and 792 transitions. [2020-10-16 10:48:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:48:42,244 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:42,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:42,246 INFO L225 Difference]: With dead ends: 321 [2020-10-16 10:48:42,247 INFO L226 Difference]: Without dead ends: 318 [2020-10-16 10:48:42,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:48:42,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-16 10:48:42,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2020-10-16 10:48:42,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-16 10:48:42,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-10-16 10:48:42,253 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-10-16 10:48:42,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:42,253 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-10-16 10:48:42,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:42,253 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-10-16 10:48:42,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:42,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:42,254 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:42,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 10:48:42,465 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:42,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:42,466 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-16 10:48:42,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:42,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774421040] [2020-10-16 10:48:42,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:42,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774421040] [2020-10-16 10:48:42,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228100759] [2020-10-16 10:48:42,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:42,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:48:42,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:42,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:42,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:42,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:42,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:42,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658198558] [2020-10-16 10:48:42,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:42,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:42,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:42,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:42,809 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-10-16 10:48:43,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:43,170 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-10-16 10:48:43,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:48:43,171 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:43,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:43,172 INFO L225 Difference]: With dead ends: 348 [2020-10-16 10:48:43,173 INFO L226 Difference]: Without dead ends: 343 [2020-10-16 10:48:43,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:48:43,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-16 10:48:43,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 260. [2020-10-16 10:48:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-16 10:48:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 684 transitions. [2020-10-16 10:48:43,177 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 684 transitions. Word has length 14 [2020-10-16 10:48:43,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:43,177 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 684 transitions. [2020-10-16 10:48:43,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:43,177 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 684 transitions. [2020-10-16 10:48:43,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:43,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:43,178 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:43,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 10:48:43,379 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:43,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:43,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-16 10:48:43,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:43,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134633474] [2020-10-16 10:48:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:43,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134633474] [2020-10-16 10:48:43,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529919242] [2020-10-16 10:48:43,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:43,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:43,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:43,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:43,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:43,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495053134] [2020-10-16 10:48:43,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:43,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:43,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:43,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:43,689 INFO L87 Difference]: Start difference. First operand 260 states and 684 transitions. Second operand 17 states. [2020-10-16 10:48:44,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:44,004 INFO L93 Difference]: Finished difference Result 349 states and 864 transitions. [2020-10-16 10:48:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:48:44,005 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:44,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:44,005 INFO L225 Difference]: With dead ends: 349 [2020-10-16 10:48:44,005 INFO L226 Difference]: Without dead ends: 344 [2020-10-16 10:48:44,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:48:44,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-16 10:48:44,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2020-10-16 10:48:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-16 10:48:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-10-16 10:48:44,010 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-10-16 10:48:44,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:44,010 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-10-16 10:48:44,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:44,011 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-10-16 10:48:44,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:44,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:44,011 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:44,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-16 10:48:44,212 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:44,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:44,212 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-16 10:48:44,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:44,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919503118] [2020-10-16 10:48:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:44,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919503118] [2020-10-16 10:48:44,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525951950] [2020-10-16 10:48:44,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:44,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:48:44,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:44,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:44,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:44,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:44,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:44,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872484695] [2020-10-16 10:48:44,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:44,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:44,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:44,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:44,535 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-10-16 10:48:44,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:44,812 INFO L93 Difference]: Finished difference Result 332 states and 822 transitions. [2020-10-16 10:48:44,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:48:44,812 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:44,813 INFO L225 Difference]: With dead ends: 332 [2020-10-16 10:48:44,813 INFO L226 Difference]: Without dead ends: 314 [2020-10-16 10:48:44,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:48:44,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-16 10:48:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 260. [2020-10-16 10:48:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-16 10:48:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 677 transitions. [2020-10-16 10:48:44,818 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 677 transitions. Word has length 14 [2020-10-16 10:48:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:44,818 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 677 transitions. [2020-10-16 10:48:44,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 677 transitions. [2020-10-16 10:48:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:44,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:44,819 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:45,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:45,021 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:45,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:45,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-16 10:48:45,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:45,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657333597] [2020-10-16 10:48:45,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:45,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657333597] [2020-10-16 10:48:45,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851409908] [2020-10-16 10:48:45,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:45,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:48:45,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:45,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:45,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:45,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:45,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:45,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485131062] [2020-10-16 10:48:45,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:45,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:45,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:45,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:45,339 INFO L87 Difference]: Start difference. First operand 260 states and 677 transitions. Second operand 17 states. [2020-10-16 10:48:45,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:45,613 INFO L93 Difference]: Finished difference Result 315 states and 779 transitions. [2020-10-16 10:48:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:48:45,614 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:45,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:45,614 INFO L225 Difference]: With dead ends: 315 [2020-10-16 10:48:45,614 INFO L226 Difference]: Without dead ends: 312 [2020-10-16 10:48:45,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:48:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-16 10:48:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 265. [2020-10-16 10:48:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-16 10:48:45,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-10-16 10:48:45,620 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-10-16 10:48:45,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:45,620 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-10-16 10:48:45,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-10-16 10:48:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:45,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:45,620 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:45,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:45,821 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:45,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:45,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-16 10:48:45,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:45,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630418892] [2020-10-16 10:48:45,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:45,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630418892] [2020-10-16 10:48:45,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550380390] [2020-10-16 10:48:45,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:45,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:48:45,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:45,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:45,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:46,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:46,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:46,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443227055] [2020-10-16 10:48:46,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:46,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:46,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:46,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:46,174 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 17 states. [2020-10-16 10:48:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:46,479 INFO L93 Difference]: Finished difference Result 334 states and 821 transitions. [2020-10-16 10:48:46,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:48:46,480 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:46,480 INFO L225 Difference]: With dead ends: 334 [2020-10-16 10:48:46,481 INFO L226 Difference]: Without dead ends: 330 [2020-10-16 10:48:46,481 INFO L677 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 [2020-10-16 10:48:46,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-16 10:48:46,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-10-16 10:48:46,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-16 10:48:46,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 687 transitions. [2020-10-16 10:48:46,485 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 687 transitions. Word has length 14 [2020-10-16 10:48:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:46,485 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 687 transitions. [2020-10-16 10:48:46,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 687 transitions. [2020-10-16 10:48:46,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:46,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:46,486 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:46,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:46,687 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:46,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:46,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-16 10:48:46,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:46,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959774921] [2020-10-16 10:48:46,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:46,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959774921] [2020-10-16 10:48:46,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252163588] [2020-10-16 10:48:46,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:46,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:48:46,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:46,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:46,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:47,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:47,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:47,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33276485] [2020-10-16 10:48:47,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:47,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:47,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:47,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:47,110 INFO L87 Difference]: Start difference. First operand 264 states and 687 transitions. Second operand 17 states. [2020-10-16 10:48:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:47,498 INFO L93 Difference]: Finished difference Result 351 states and 859 transitions. [2020-10-16 10:48:47,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:48:47,499 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:47,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:47,499 INFO L225 Difference]: With dead ends: 351 [2020-10-16 10:48:47,500 INFO L226 Difference]: Without dead ends: 346 [2020-10-16 10:48:47,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:48:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-16 10:48:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2020-10-16 10:48:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-16 10:48:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 700 transitions. [2020-10-16 10:48:47,504 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 700 transitions. Word has length 14 [2020-10-16 10:48:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:47,504 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 700 transitions. [2020-10-16 10:48:47,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 700 transitions. [2020-10-16 10:48:47,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:47,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:47,505 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:47,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:47,706 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:47,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:47,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-16 10:48:47,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:47,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716182407] [2020-10-16 10:48:47,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:47,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716182407] [2020-10-16 10:48:47,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998844557] [2020-10-16 10:48:47,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:47,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:48:47,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:47,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:47,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:48,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:48,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:48,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85013692] [2020-10-16 10:48:48,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:48,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:48,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:48,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:48,030 INFO L87 Difference]: Start difference. First operand 269 states and 700 transitions. Second operand 17 states. [2020-10-16 10:48:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:48,353 INFO L93 Difference]: Finished difference Result 357 states and 870 transitions. [2020-10-16 10:48:48,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:48:48,354 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:48,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:48,355 INFO L225 Difference]: With dead ends: 357 [2020-10-16 10:48:48,355 INFO L226 Difference]: Without dead ends: 339 [2020-10-16 10:48:48,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:48:48,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-10-16 10:48:48,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 269. [2020-10-16 10:48:48,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-16 10:48:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 696 transitions. [2020-10-16 10:48:48,359 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 696 transitions. Word has length 14 [2020-10-16 10:48:48,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:48,360 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 696 transitions. [2020-10-16 10:48:48,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:48,360 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 696 transitions. [2020-10-16 10:48:48,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:48,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:48,360 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:48,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:48,561 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:48,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:48,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-16 10:48:48,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:48,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890450813] [2020-10-16 10:48:48,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:48,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890450813] [2020-10-16 10:48:48,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619904411] [2020-10-16 10:48:48,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:48,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:48,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:48,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:48,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:48,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101988676] [2020-10-16 10:48:48,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:48,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:48,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:48,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:48,938 INFO L87 Difference]: Start difference. First operand 269 states and 696 transitions. Second operand 17 states. [2020-10-16 10:48:49,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:49,251 INFO L93 Difference]: Finished difference Result 332 states and 820 transitions. [2020-10-16 10:48:49,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:48:49,252 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:49,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:49,253 INFO L225 Difference]: With dead ends: 332 [2020-10-16 10:48:49,253 INFO L226 Difference]: Without dead ends: 327 [2020-10-16 10:48:49,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:48:49,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-16 10:48:49,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 266. [2020-10-16 10:48:49,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-16 10:48:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 689 transitions. [2020-10-16 10:48:49,259 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 689 transitions. Word has length 14 [2020-10-16 10:48:49,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:49,259 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 689 transitions. [2020-10-16 10:48:49,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:49,259 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 689 transitions. [2020-10-16 10:48:49,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:49,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:49,260 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:49,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-16 10:48:49,462 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:49,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:49,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-16 10:48:49,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:49,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656480606] [2020-10-16 10:48:49,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:49,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656480606] [2020-10-16 10:48:49,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398517979] [2020-10-16 10:48:49,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:49,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:48:49,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:49,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:49,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:49,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:49,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:49,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576643119] [2020-10-16 10:48:49,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:49,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:49,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:49,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:49,839 INFO L87 Difference]: Start difference. First operand 266 states and 689 transitions. Second operand 17 states. [2020-10-16 10:48:50,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:50,027 INFO L93 Difference]: Finished difference Result 322 states and 792 transitions. [2020-10-16 10:48:50,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:48:50,028 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:50,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:50,028 INFO L225 Difference]: With dead ends: 322 [2020-10-16 10:48:50,028 INFO L226 Difference]: Without dead ends: 309 [2020-10-16 10:48:50,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:48:50,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-16 10:48:50,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2020-10-16 10:48:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 10:48:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-10-16 10:48:50,032 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-10-16 10:48:50,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:50,033 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-10-16 10:48:50,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:50,033 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-10-16 10:48:50,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:50,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:50,033 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:50,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 10:48:50,234 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:50,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:50,235 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-16 10:48:50,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:50,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994282374] [2020-10-16 10:48:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:50,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994282374] [2020-10-16 10:48:50,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149737851] [2020-10-16 10:48:50,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:50,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:48:50,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:50,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:50,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:50,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:50,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:50,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790179929] [2020-10-16 10:48:50,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:50,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:50,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:50,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:50,601 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-10-16 10:48:50,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:50,682 INFO L93 Difference]: Finished difference Result 305 states and 753 transitions. [2020-10-16 10:48:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:48:50,683 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:50,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:50,684 INFO L225 Difference]: With dead ends: 305 [2020-10-16 10:48:50,684 INFO L226 Difference]: Without dead ends: 303 [2020-10-16 10:48:50,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:48:50,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-16 10:48:50,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2020-10-16 10:48:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-16 10:48:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 709 transitions. [2020-10-16 10:48:50,689 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 709 transitions. Word has length 14 [2020-10-16 10:48:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:50,689 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 709 transitions. [2020-10-16 10:48:50,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:50,689 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 709 transitions. [2020-10-16 10:48:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:50,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:50,690 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:50,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-16 10:48:50,898 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:50,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:50,899 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-16 10:48:50,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:50,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808256511] [2020-10-16 10:48:50,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:51,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808256511] [2020-10-16 10:48:51,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212060183] [2020-10-16 10:48:51,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:51,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:48:51,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:51,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:51,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:51,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:51,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663909089] [2020-10-16 10:48:51,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:51,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:51,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:51,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:51,269 INFO L87 Difference]: Start difference. First operand 274 states and 709 transitions. Second operand 17 states. [2020-10-16 10:48:51,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:51,496 INFO L93 Difference]: Finished difference Result 325 states and 802 transitions. [2020-10-16 10:48:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:48:51,496 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:51,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:51,497 INFO L225 Difference]: With dead ends: 325 [2020-10-16 10:48:51,497 INFO L226 Difference]: Without dead ends: 322 [2020-10-16 10:48:51,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:48:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-16 10:48:51,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 272. [2020-10-16 10:48:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-16 10:48:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-16 10:48:51,502 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-16 10:48:51,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:51,502 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-16 10:48:51,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-16 10:48:51,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:51,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:51,503 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:51,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 10:48:51,704 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:51,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:51,704 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-16 10:48:51,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:51,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862532301] [2020-10-16 10:48:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:51,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862532301] [2020-10-16 10:48:51,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905552259] [2020-10-16 10:48:51,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:51,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:48:51,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:51,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:51,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:52,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:52,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:52,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041119744] [2020-10-16 10:48:52,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:52,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:52,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:52,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:52,135 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-16 10:48:52,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:52,453 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-10-16 10:48:52,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:48:52,454 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:52,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:52,454 INFO L225 Difference]: With dead ends: 348 [2020-10-16 10:48:52,454 INFO L226 Difference]: Without dead ends: 344 [2020-10-16 10:48:52,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:48:52,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-16 10:48:52,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 270. [2020-10-16 10:48:52,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-16 10:48:52,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 697 transitions. [2020-10-16 10:48:52,458 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 697 transitions. Word has length 14 [2020-10-16 10:48:52,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:52,458 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 697 transitions. [2020-10-16 10:48:52,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:52,458 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 697 transitions. [2020-10-16 10:48:52,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:52,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:52,459 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:52,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:52,659 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:52,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:52,660 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-16 10:48:52,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:52,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388926225] [2020-10-16 10:48:52,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:52,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388926225] [2020-10-16 10:48:52,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18979572] [2020-10-16 10:48:52,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:52,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:48:52,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:48:52,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:52,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:48:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:55,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:48:55,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:48:55,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711643552] [2020-10-16 10:48:55,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:48:55,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:48:55,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:48:55,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:48:55,130 INFO L87 Difference]: Start difference. First operand 270 states and 697 transitions. Second operand 17 states. [2020-10-16 10:48:55,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:48:55,548 INFO L93 Difference]: Finished difference Result 338 states and 827 transitions. [2020-10-16 10:48:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:48:55,549 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:48:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:48:55,550 INFO L225 Difference]: With dead ends: 338 [2020-10-16 10:48:55,550 INFO L226 Difference]: Without dead ends: 335 [2020-10-16 10:48:55,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:48:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-16 10:48:55,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 272. [2020-10-16 10:48:55,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-16 10:48:55,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-16 10:48:55,558 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-16 10:48:55,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:48:55,558 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-16 10:48:55,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:48:55,558 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-16 10:48:55,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:48:55,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:48:55,559 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:48:55,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:48:55,770 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:48:55,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:48:55,771 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-16 10:48:55,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:48:55,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813538865] [2020-10-16 10:48:55,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:48:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:48:55,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813538865] [2020-10-16 10:48:55,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815411212] [2020-10-16 10:48:55,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:48:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:48:55,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:48:55,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:00,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:00,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:00,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662013689] [2020-10-16 10:49:00,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:00,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:00,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:00,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-16 10:49:00,093 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-16 10:49:04,328 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 10:49:04,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:04,693 INFO L93 Difference]: Finished difference Result 369 states and 902 transitions. [2020-10-16 10:49:04,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:49:04,693 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:04,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:04,694 INFO L225 Difference]: With dead ends: 369 [2020-10-16 10:49:04,694 INFO L226 Difference]: Without dead ends: 364 [2020-10-16 10:49:04,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-16 10:49:04,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-16 10:49:04,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 272. [2020-10-16 10:49:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-16 10:49:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-16 10:49:04,701 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-16 10:49:04,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:04,701 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-16 10:49:04,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:04,701 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-16 10:49:04,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:04,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:04,702 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:04,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-16 10:49:04,903 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:04,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:04,904 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-16 10:49:04,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:04,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833278882] [2020-10-16 10:49:04,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:05,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833278882] [2020-10-16 10:49:05,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694039653] [2020-10-16 10:49:05,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:05,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:05,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:05,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:05,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:05,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:05,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:05,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024116927] [2020-10-16 10:49:05,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:05,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:05,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:05,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:05,901 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-16 10:49:06,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:06,353 INFO L93 Difference]: Finished difference Result 352 states and 862 transitions. [2020-10-16 10:49:06,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:49:06,354 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:06,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:06,355 INFO L225 Difference]: With dead ends: 352 [2020-10-16 10:49:06,355 INFO L226 Difference]: Without dead ends: 348 [2020-10-16 10:49:06,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:49:06,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-16 10:49:06,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 268. [2020-10-16 10:49:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 10:49:06,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-10-16 10:49:06,360 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-10-16 10:49:06,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:06,360 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-10-16 10:49:06,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:06,360 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-10-16 10:49:06,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:06,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:06,361 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:06,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:06,561 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:06,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:06,562 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-16 10:49:06,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:06,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500089912] [2020-10-16 10:49:06,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:06,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500089912] [2020-10-16 10:49:06,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356110222] [2020-10-16 10:49:06,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:06,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:49:06,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:06,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:06,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:06,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:06,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:06,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876823062] [2020-10-16 10:49:06,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:06,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:06,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:06,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:06,904 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-10-16 10:49:07,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:07,339 INFO L93 Difference]: Finished difference Result 330 states and 806 transitions. [2020-10-16 10:49:07,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:49:07,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:07,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:07,340 INFO L225 Difference]: With dead ends: 330 [2020-10-16 10:49:07,340 INFO L226 Difference]: Without dead ends: 327 [2020-10-16 10:49:07,341 INFO L677 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 [2020-10-16 10:49:07,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-16 10:49:07,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2020-10-16 10:49:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-16 10:49:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-10-16 10:49:07,345 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-10-16 10:49:07,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:07,345 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-10-16 10:49:07,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:07,346 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-10-16 10:49:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:07,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:07,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:07,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:07,547 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:07,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:07,547 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-10-16 10:49:07,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:07,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856715640] [2020-10-16 10:49:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:07,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856715640] [2020-10-16 10:49:07,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998299078] [2020-10-16 10:49:07,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:07,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:07,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:07,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:07,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:07,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:07,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:07,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712169100] [2020-10-16 10:49:07,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:07,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:07,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:07,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:07,891 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-10-16 10:49:08,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:08,381 INFO L93 Difference]: Finished difference Result 365 states and 887 transitions. [2020-10-16 10:49:08,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:49:08,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:08,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:08,383 INFO L225 Difference]: With dead ends: 365 [2020-10-16 10:49:08,383 INFO L226 Difference]: Without dead ends: 360 [2020-10-16 10:49:08,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:49:08,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-16 10:49:08,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 272. [2020-10-16 10:49:08,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-16 10:49:08,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-16 10:49:08,388 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-16 10:49:08,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:08,388 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-16 10:49:08,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:08,388 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-16 10:49:08,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:08,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:08,389 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:08,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:08,590 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:08,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:08,590 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-10-16 10:49:08,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:08,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314084137] [2020-10-16 10:49:08,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:08,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314084137] [2020-10-16 10:49:08,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937181688] [2020-10-16 10:49:08,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:08,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:49:08,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:08,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:08,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:08,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:08,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:08,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163575300] [2020-10-16 10:49:08,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:08,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:08,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:08,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:08,930 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-16 10:49:09,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:09,334 INFO L93 Difference]: Finished difference Result 363 states and 882 transitions. [2020-10-16 10:49:09,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:49:09,335 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:09,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:09,336 INFO L225 Difference]: With dead ends: 363 [2020-10-16 10:49:09,337 INFO L226 Difference]: Without dead ends: 358 [2020-10-16 10:49:09,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:49:09,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-16 10:49:09,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 271. [2020-10-16 10:49:09,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-16 10:49:09,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-10-16 10:49:09,342 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-10-16 10:49:09,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:09,342 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-10-16 10:49:09,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:09,342 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-10-16 10:49:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:09,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:09,343 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:09,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-16 10:49:09,546 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:09,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:09,547 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-10-16 10:49:09,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:09,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855217854] [2020-10-16 10:49:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:09,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855217854] [2020-10-16 10:49:09,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977367267] [2020-10-16 10:49:09,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:09,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:49:09,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:09,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:09,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:09,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:09,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:09,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290368127] [2020-10-16 10:49:09,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:09,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:09,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:09,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:09,876 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-10-16 10:49:10,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:10,216 INFO L93 Difference]: Finished difference Result 333 states and 812 transitions. [2020-10-16 10:49:10,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:49:10,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:10,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:10,218 INFO L225 Difference]: With dead ends: 333 [2020-10-16 10:49:10,218 INFO L226 Difference]: Without dead ends: 315 [2020-10-16 10:49:10,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:49:10,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-16 10:49:10,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 266. [2020-10-16 10:49:10,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-16 10:49:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-16 10:49:10,223 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-16 10:49:10,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:10,223 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-16 10:49:10,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:10,223 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-16 10:49:10,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:10,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:10,224 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:10,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-16 10:49:10,424 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:10,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:10,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-10-16 10:49:10,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:10,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361723316] [2020-10-16 10:49:10,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:10,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361723316] [2020-10-16 10:49:10,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480842798] [2020-10-16 10:49:10,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:10,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:10,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:10,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:10,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:10,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087820299] [2020-10-16 10:49:10,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:10,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:10,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:10,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:10,804 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-16 10:49:10,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:10,915 INFO L93 Difference]: Finished difference Result 296 states and 732 transitions. [2020-10-16 10:49:10,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:49:10,916 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:10,916 INFO L225 Difference]: With dead ends: 296 [2020-10-16 10:49:10,917 INFO L226 Difference]: Without dead ends: 294 [2020-10-16 10:49:10,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:49:10,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-16 10:49:10,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 270. [2020-10-16 10:49:10,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-16 10:49:10,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 695 transitions. [2020-10-16 10:49:10,921 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 695 transitions. Word has length 14 [2020-10-16 10:49:10,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:10,921 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 695 transitions. [2020-10-16 10:49:10,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:10,921 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 695 transitions. [2020-10-16 10:49:10,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:10,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:10,922 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:11,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-16 10:49:11,123 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:11,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:11,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-10-16 10:49:11,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:11,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267874109] [2020-10-16 10:49:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:11,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267874109] [2020-10-16 10:49:11,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401486678] [2020-10-16 10:49:11,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:11,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:11,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:11,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:11,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:11,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:11,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:11,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089458634] [2020-10-16 10:49:11,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:11,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:11,495 INFO L87 Difference]: Start difference. First operand 270 states and 695 transitions. Second operand 17 states. [2020-10-16 10:49:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:11,786 INFO L93 Difference]: Finished difference Result 328 states and 803 transitions. [2020-10-16 10:49:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:49:11,787 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:11,788 INFO L225 Difference]: With dead ends: 328 [2020-10-16 10:49:11,788 INFO L226 Difference]: Without dead ends: 325 [2020-10-16 10:49:11,788 INFO L677 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 [2020-10-16 10:49:11,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-16 10:49:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 268. [2020-10-16 10:49:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 10:49:11,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-16 10:49:11,792 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-16 10:49:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:11,793 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-16 10:49:11,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:11,793 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-16 10:49:11,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:11,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:11,793 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:11,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-16 10:49:11,994 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:11,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-10-16 10:49:11,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:11,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839594133] [2020-10-16 10:49:11,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:12,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839594133] [2020-10-16 10:49:12,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806985215] [2020-10-16 10:49:12,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:12,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:49:12,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:12,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:12,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:12,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:12,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:12,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358761100] [2020-10-16 10:49:12,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:12,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:12,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:12,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:12,529 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-16 10:49:13,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:13,092 INFO L93 Difference]: Finished difference Result 344 states and 841 transitions. [2020-10-16 10:49:13,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:49:13,093 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:13,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:13,094 INFO L225 Difference]: With dead ends: 344 [2020-10-16 10:49:13,094 INFO L226 Difference]: Without dead ends: 340 [2020-10-16 10:49:13,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:49:13,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-16 10:49:13,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 266. [2020-10-16 10:49:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-16 10:49:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-16 10:49:13,102 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-16 10:49:13,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:13,102 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-16 10:49:13,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:13,102 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-16 10:49:13,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:13,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:13,103 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:13,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-16 10:49:13,316 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:13,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-10-16 10:49:13,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:13,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246261361] [2020-10-16 10:49:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:13,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246261361] [2020-10-16 10:49:13,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827788379] [2020-10-16 10:49:13,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:13,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:13,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:13,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:13,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:15,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:15,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:15,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561477225] [2020-10-16 10:49:15,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:15,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:15,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:15,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:15,966 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-16 10:49:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:16,434 INFO L93 Difference]: Finished difference Result 331 states and 805 transitions. [2020-10-16 10:49:16,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:49:16,436 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:16,437 INFO L225 Difference]: With dead ends: 331 [2020-10-16 10:49:16,437 INFO L226 Difference]: Without dead ends: 328 [2020-10-16 10:49:16,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:49:16,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-16 10:49:16,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 268. [2020-10-16 10:49:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 10:49:16,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-16 10:49:16,442 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-16 10:49:16,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:16,442 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-16 10:49:16,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:16,442 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-16 10:49:16,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:16,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:16,443 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:16,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-16 10:49:16,656 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:16,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:16,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-10-16 10:49:16,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:16,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674678357] [2020-10-16 10:49:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:16,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674678357] [2020-10-16 10:49:16,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328992935] [2020-10-16 10:49:16,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:16,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:16,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:16,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:16,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:20,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:20,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:20,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458557427] [2020-10-16 10:49:20,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:20,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:20,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:20,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-16 10:49:20,470 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-16 10:49:24,741 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 10:49:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:25,105 INFO L93 Difference]: Finished difference Result 357 states and 866 transitions. [2020-10-16 10:49:25,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:49:25,106 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:25,107 INFO L225 Difference]: With dead ends: 357 [2020-10-16 10:49:25,107 INFO L226 Difference]: Without dead ends: 352 [2020-10-16 10:49:25,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-16 10:49:25,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-16 10:49:25,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 268. [2020-10-16 10:49:25,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 10:49:25,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-16 10:49:25,113 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-16 10:49:25,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:25,113 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-16 10:49:25,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:25,113 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-16 10:49:25,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:25,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:25,114 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:25,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:25,315 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:25,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:25,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-10-16 10:49:25,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:25,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100919930] [2020-10-16 10:49:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:25,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100919930] [2020-10-16 10:49:25,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924103292] [2020-10-16 10:49:25,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:25,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:49:25,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:25,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:25,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:25,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:25,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:25,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878206230] [2020-10-16 10:49:25,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:25,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:25,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:25,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:25,875 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-16 10:49:26,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:26,394 INFO L93 Difference]: Finished difference Result 339 states and 826 transitions. [2020-10-16 10:49:26,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:49:26,395 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:26,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:26,396 INFO L225 Difference]: With dead ends: 339 [2020-10-16 10:49:26,396 INFO L226 Difference]: Without dead ends: 335 [2020-10-16 10:49:26,396 INFO L677 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 [2020-10-16 10:49:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-16 10:49:26,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 264. [2020-10-16 10:49:26,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-16 10:49:26,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-10-16 10:49:26,401 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-10-16 10:49:26,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:26,401 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-10-16 10:49:26,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:26,401 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-10-16 10:49:26,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:26,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:26,401 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:26,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:26,602 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:26,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:26,603 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-10-16 10:49:26,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:26,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17241253] [2020-10-16 10:49:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:26,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17241253] [2020-10-16 10:49:26,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729275409] [2020-10-16 10:49:26,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:26,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:26,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:26,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:26,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:26,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86949664] [2020-10-16 10:49:26,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:26,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:26,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:26,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:26,998 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 17 states. [2020-10-16 10:49:27,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:27,196 INFO L93 Difference]: Finished difference Result 287 states and 713 transitions. [2020-10-16 10:49:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:49:27,198 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:27,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:27,199 INFO L225 Difference]: With dead ends: 287 [2020-10-16 10:49:27,199 INFO L226 Difference]: Without dead ends: 285 [2020-10-16 10:49:27,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:49:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-16 10:49:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 266. [2020-10-16 10:49:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-16 10:49:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-16 10:49:27,207 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-16 10:49:27,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:27,207 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-16 10:49:27,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:27,207 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-16 10:49:27,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:27,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:27,208 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:27,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:27,423 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:27,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:27,424 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-10-16 10:49:27,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:27,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201886528] [2020-10-16 10:49:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:27,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201886528] [2020-10-16 10:49:27,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651066940] [2020-10-16 10:49:27,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:27,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:27,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:27,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:27,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:27,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:27,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:27,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936174557] [2020-10-16 10:49:27,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:27,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:27,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:27,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:27,893 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-16 10:49:28,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:28,247 INFO L93 Difference]: Finished difference Result 317 states and 778 transitions. [2020-10-16 10:49:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:49:28,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:28,249 INFO L225 Difference]: With dead ends: 317 [2020-10-16 10:49:28,249 INFO L226 Difference]: Without dead ends: 314 [2020-10-16 10:49:28,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:49:28,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-16 10:49:28,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 264. [2020-10-16 10:49:28,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-16 10:49:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-10-16 10:49:28,253 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-10-16 10:49:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:28,254 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-10-16 10:49:28,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-10-16 10:49:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:28,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:28,254 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:28,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:28,455 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:28,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:28,456 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-10-16 10:49:28,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:28,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992030390] [2020-10-16 10:49:28,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:28,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992030390] [2020-10-16 10:49:28,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579198877] [2020-10-16 10:49:28,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:28,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:49:28,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:28,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:49:28,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:28,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:28,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-10-16 10:49:28,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816302122] [2020-10-16 10:49:28,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:49:28,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:28,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:49:28,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:49:28,727 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 14 states. [2020-10-16 10:49:29,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:29,064 INFO L93 Difference]: Finished difference Result 337 states and 817 transitions. [2020-10-16 10:49:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:49:29,065 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2020-10-16 10:49:29,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:29,066 INFO L225 Difference]: With dead ends: 337 [2020-10-16 10:49:29,066 INFO L226 Difference]: Without dead ends: 330 [2020-10-16 10:49:29,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:49:29,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-16 10:49:29,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 262. [2020-10-16 10:49:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-16 10:49:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-10-16 10:49:29,070 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-10-16 10:49:29,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:29,070 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-10-16 10:49:29,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:49:29,070 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-10-16 10:49:29,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:29,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:29,071 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:29,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:29,272 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:29,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:29,272 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-10-16 10:49:29,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:29,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032259708] [2020-10-16 10:49:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:29,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032259708] [2020-10-16 10:49:29,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371653305] [2020-10-16 10:49:29,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:29,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:29,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:29,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:29,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:29,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:29,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:29,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41784138] [2020-10-16 10:49:29,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:29,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:29,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:29,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:29,655 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-10-16 10:49:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:29,845 INFO L93 Difference]: Finished difference Result 278 states and 694 transitions. [2020-10-16 10:49:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:49:29,846 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:29,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:29,847 INFO L225 Difference]: With dead ends: 278 [2020-10-16 10:49:29,847 INFO L226 Difference]: Without dead ends: 276 [2020-10-16 10:49:29,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:49:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-16 10:49:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 262. [2020-10-16 10:49:29,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-16 10:49:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-10-16 10:49:29,851 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-10-16 10:49:29,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:29,852 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-10-16 10:49:29,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-10-16 10:49:29,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:29,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:29,852 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:30,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:30,053 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:30,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:30,054 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-10-16 10:49:30,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:30,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341516017] [2020-10-16 10:49:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:30,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341516017] [2020-10-16 10:49:30,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36770567] [2020-10-16 10:49:30,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:30,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:49:30,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:30,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:30,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:30,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:30,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:30,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950968811] [2020-10-16 10:49:30,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:30,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:30,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:30,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:30,408 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-10-16 10:49:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:30,779 INFO L93 Difference]: Finished difference Result 306 states and 753 transitions. [2020-10-16 10:49:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:49:30,780 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:30,780 INFO L225 Difference]: With dead ends: 306 [2020-10-16 10:49:30,780 INFO L226 Difference]: Without dead ends: 303 [2020-10-16 10:49:30,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:49:30,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-16 10:49:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 260. [2020-10-16 10:49:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-16 10:49:30,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 665 transitions. [2020-10-16 10:49:30,785 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 665 transitions. Word has length 14 [2020-10-16 10:49:30,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:30,785 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 665 transitions. [2020-10-16 10:49:30,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:30,785 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 665 transitions. [2020-10-16 10:49:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:30,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:30,786 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:30,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-16 10:49:30,987 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:30,987 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-10-16 10:49:30,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:30,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445937401] [2020-10-16 10:49:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:31,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445937401] [2020-10-16 10:49:31,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462461928] [2020-10-16 10:49:31,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:31,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:49:31,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:31,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:49:31,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:31,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:31,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 10:49:31,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114780559] [2020-10-16 10:49:31,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:49:31,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:31,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:49:31,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:49:31,187 INFO L87 Difference]: Start difference. First operand 260 states and 665 transitions. Second operand 11 states. [2020-10-16 10:49:31,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:31,366 INFO L93 Difference]: Finished difference Result 269 states and 677 transitions. [2020-10-16 10:49:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:49:31,367 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 10:49:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:31,368 INFO L225 Difference]: With dead ends: 269 [2020-10-16 10:49:31,368 INFO L226 Difference]: Without dead ends: 267 [2020-10-16 10:49:31,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:49:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-16 10:49:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2020-10-16 10:49:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-16 10:49:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 659 transitions. [2020-10-16 10:49:31,373 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 659 transitions. Word has length 14 [2020-10-16 10:49:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:31,373 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 659 transitions. [2020-10-16 10:49:31,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:49:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 659 transitions. [2020-10-16 10:49:31,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:31,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:31,374 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:31,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:31,584 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:31,585 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-10-16 10:49:31,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:31,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981098988] [2020-10-16 10:49:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:31,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981098988] [2020-10-16 10:49:31,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73353053] [2020-10-16 10:49:31,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:31,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:31,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:31,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:49:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:31,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:31,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:31,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450643459] [2020-10-16 10:49:31,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:31,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:31,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:31,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:31,967 INFO L87 Difference]: Start difference. First operand 256 states and 659 transitions. Second operand 17 states. [2020-10-16 10:49:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:32,485 INFO L93 Difference]: Finished difference Result 298 states and 754 transitions. [2020-10-16 10:49:32,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:49:32,486 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:32,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:32,487 INFO L225 Difference]: With dead ends: 298 [2020-10-16 10:49:32,487 INFO L226 Difference]: Without dead ends: 294 [2020-10-16 10:49:32,487 INFO L677 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 [2020-10-16 10:49:32,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-16 10:49:32,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 257. [2020-10-16 10:49:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-16 10:49:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 662 transitions. [2020-10-16 10:49:32,492 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 662 transitions. Word has length 14 [2020-10-16 10:49:32,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:32,492 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 662 transitions. [2020-10-16 10:49:32,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:32,492 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 662 transitions. [2020-10-16 10:49:32,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:32,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:32,493 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:32,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-16 10:49:32,694 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:32,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:32,694 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-10-16 10:49:32,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:32,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298275590] [2020-10-16 10:49:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:32,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298275590] [2020-10-16 10:49:32,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180838841] [2020-10-16 10:49:32,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:32,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:32,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:32,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:32,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:33,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:33,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:33,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738320024] [2020-10-16 10:49:33,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:33,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:33,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:33,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:33,065 INFO L87 Difference]: Start difference. First operand 257 states and 662 transitions. Second operand 17 states. [2020-10-16 10:49:33,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:33,511 INFO L93 Difference]: Finished difference Result 313 states and 786 transitions. [2020-10-16 10:49:33,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:49:33,512 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:33,512 INFO L225 Difference]: With dead ends: 313 [2020-10-16 10:49:33,513 INFO L226 Difference]: Without dead ends: 310 [2020-10-16 10:49:33,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:49:33,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-16 10:49:33,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 259. [2020-10-16 10:49:33,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-16 10:49:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 669 transitions. [2020-10-16 10:49:33,517 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 669 transitions. Word has length 14 [2020-10-16 10:49:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:33,517 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 669 transitions. [2020-10-16 10:49:33,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:33,518 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 669 transitions. [2020-10-16 10:49:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:33,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:33,518 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:33,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:33,719 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:33,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:33,720 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-10-16 10:49:33,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:33,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943265269] [2020-10-16 10:49:33,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:33,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943265269] [2020-10-16 10:49:33,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448731694] [2020-10-16 10:49:33,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:33,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:49:33,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:33,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:49:33,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:34,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:49:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:34,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:34,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:34,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11156909] [2020-10-16 10:49:34,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:34,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:34,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:34,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:34,077 INFO L87 Difference]: Start difference. First operand 259 states and 669 transitions. Second operand 17 states. [2020-10-16 10:49:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:34,728 INFO L93 Difference]: Finished difference Result 314 states and 795 transitions. [2020-10-16 10:49:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:49:34,729 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:34,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:34,730 INFO L225 Difference]: With dead ends: 314 [2020-10-16 10:49:34,730 INFO L226 Difference]: Without dead ends: 309 [2020-10-16 10:49:34,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:49:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-16 10:49:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 259. [2020-10-16 10:49:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-16 10:49:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 668 transitions. [2020-10-16 10:49:34,734 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 668 transitions. Word has length 14 [2020-10-16 10:49:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:34,734 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 668 transitions. [2020-10-16 10:49:34,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 668 transitions. [2020-10-16 10:49:34,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:34,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:34,735 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:34,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:34,939 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:34,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:34,939 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-10-16 10:49:34,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:34,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676662077] [2020-10-16 10:49:34,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:35,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676662077] [2020-10-16 10:49:35,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360999579] [2020-10-16 10:49:35,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:35,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:35,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:35,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:35,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:35,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:49:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:35,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:35,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:35,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697593381] [2020-10-16 10:49:35,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:35,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:35,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:35,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:35,351 INFO L87 Difference]: Start difference. First operand 259 states and 668 transitions. Second operand 17 states. [2020-10-16 10:49:36,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:36,024 INFO L93 Difference]: Finished difference Result 333 states and 837 transitions. [2020-10-16 10:49:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:49:36,025 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:36,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:36,026 INFO L225 Difference]: With dead ends: 333 [2020-10-16 10:49:36,026 INFO L226 Difference]: Without dead ends: 328 [2020-10-16 10:49:36,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:49:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-16 10:49:36,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 259. [2020-10-16 10:49:36,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-16 10:49:36,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 671 transitions. [2020-10-16 10:49:36,031 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 671 transitions. Word has length 14 [2020-10-16 10:49:36,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:36,031 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 671 transitions. [2020-10-16 10:49:36,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 671 transitions. [2020-10-16 10:49:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:36,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:36,032 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:36,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-16 10:49:36,242 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:36,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:36,242 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-10-16 10:49:36,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:36,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394962524] [2020-10-16 10:49:36,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:36,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394962524] [2020-10-16 10:49:36,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970512187] [2020-10-16 10:49:36,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:36,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:49:36,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:36,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:36,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:36,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:36,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:36,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769733473] [2020-10-16 10:49:36,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:36,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:36,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:36,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:36,639 INFO L87 Difference]: Start difference. First operand 259 states and 671 transitions. Second operand 17 states. [2020-10-16 10:49:37,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:37,122 INFO L93 Difference]: Finished difference Result 350 states and 873 transitions. [2020-10-16 10:49:37,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:49:37,123 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:37,124 INFO L225 Difference]: With dead ends: 350 [2020-10-16 10:49:37,124 INFO L226 Difference]: Without dead ends: 346 [2020-10-16 10:49:37,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:49:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-16 10:49:37,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 261. [2020-10-16 10:49:37,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-16 10:49:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 678 transitions. [2020-10-16 10:49:37,129 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 678 transitions. Word has length 14 [2020-10-16 10:49:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:37,129 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 678 transitions. [2020-10-16 10:49:37,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:37,129 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 678 transitions. [2020-10-16 10:49:37,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:37,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:37,130 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:37,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:37,331 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:37,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:37,331 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-10-16 10:49:37,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:37,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714673989] [2020-10-16 10:49:37,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:37,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714673989] [2020-10-16 10:49:37,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544445559] [2020-10-16 10:49:37,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:37,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:49:37,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:37,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:37,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:37,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:37,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:37,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442382433] [2020-10-16 10:49:37,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:37,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:37,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:37,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:37,746 INFO L87 Difference]: Start difference. First operand 261 states and 678 transitions. Second operand 17 states. [2020-10-16 10:49:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:38,430 INFO L93 Difference]: Finished difference Result 362 states and 911 transitions. [2020-10-16 10:49:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:49:38,431 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:38,432 INFO L225 Difference]: With dead ends: 362 [2020-10-16 10:49:38,432 INFO L226 Difference]: Without dead ends: 358 [2020-10-16 10:49:38,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:49:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-16 10:49:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 265. [2020-10-16 10:49:38,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-16 10:49:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 692 transitions. [2020-10-16 10:49:38,436 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 692 transitions. Word has length 14 [2020-10-16 10:49:38,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:38,436 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 692 transitions. [2020-10-16 10:49:38,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:38,436 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 692 transitions. [2020-10-16 10:49:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:38,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:38,437 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:38,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:38,638 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:38,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:38,638 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-10-16 10:49:38,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:38,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212505105] [2020-10-16 10:49:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:38,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212505105] [2020-10-16 10:49:38,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513766091] [2020-10-16 10:49:38,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:38,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:38,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:38,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:49:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:39,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:39,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:39,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774596151] [2020-10-16 10:49:39,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:39,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:39,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:39,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:39,038 INFO L87 Difference]: Start difference. First operand 265 states and 692 transitions. Second operand 17 states. [2020-10-16 10:49:39,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:39,909 INFO L93 Difference]: Finished difference Result 322 states and 822 transitions. [2020-10-16 10:49:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:49:39,910 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:39,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:39,910 INFO L225 Difference]: With dead ends: 322 [2020-10-16 10:49:39,910 INFO L226 Difference]: Without dead ends: 316 [2020-10-16 10:49:39,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=358, Invalid=698, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:49:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-16 10:49:39,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 265. [2020-10-16 10:49:39,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-16 10:49:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-10-16 10:49:39,916 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-10-16 10:49:39,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:39,916 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-10-16 10:49:39,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:39,916 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-10-16 10:49:39,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:39,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:39,917 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:40,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:40,118 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:40,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:40,118 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-10-16 10:49:40,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:40,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734307547] [2020-10-16 10:49:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:40,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734307547] [2020-10-16 10:49:40,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711023664] [2020-10-16 10:49:40,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:40,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:40,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:40,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:40,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:42,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:49:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:42,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:42,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:42,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648283824] [2020-10-16 10:49:42,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:42,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:42,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:42,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-16 10:49:42,550 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 17 states. [2020-10-16 10:49:46,859 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-16 10:49:49,013 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-16 10:49:53,144 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-16 10:49:55,747 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-16 10:49:55,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:55,815 INFO L93 Difference]: Finished difference Result 395 states and 997 transitions. [2020-10-16 10:49:55,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:49:55,816 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:55,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:55,817 INFO L225 Difference]: With dead ends: 395 [2020-10-16 10:49:55,817 INFO L226 Difference]: Without dead ends: 386 [2020-10-16 10:49:55,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-16 10:49:55,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-16 10:49:55,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 262. [2020-10-16 10:49:55,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-16 10:49:55,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 685 transitions. [2020-10-16 10:49:55,823 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 685 transitions. Word has length 14 [2020-10-16 10:49:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:55,824 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 685 transitions. [2020-10-16 10:49:55,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 685 transitions. [2020-10-16 10:49:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:55,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:55,824 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:56,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:56,026 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:56,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:56,026 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-10-16 10:49:56,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:56,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743407524] [2020-10-16 10:49:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:56,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:56,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743407524] [2020-10-16 10:49:56,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935127270] [2020-10-16 10:49:56,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:56,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:49:56,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:56,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:56,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:56,379 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:49:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:56,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:56,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:56,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976591292] [2020-10-16 10:49:56,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:56,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:56,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:56,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:56,410 INFO L87 Difference]: Start difference. First operand 262 states and 685 transitions. Second operand 17 states. [2020-10-16 10:49:57,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:57,215 INFO L93 Difference]: Finished difference Result 358 states and 909 transitions. [2020-10-16 10:49:57,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:49:57,216 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:57,217 INFO L225 Difference]: With dead ends: 358 [2020-10-16 10:49:57,217 INFO L226 Difference]: Without dead ends: 353 [2020-10-16 10:49:57,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:49:57,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-16 10:49:57,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 262. [2020-10-16 10:49:57,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-16 10:49:57,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 685 transitions. [2020-10-16 10:49:57,222 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 685 transitions. Word has length 14 [2020-10-16 10:49:57,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:57,222 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 685 transitions. [2020-10-16 10:49:57,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:57,222 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 685 transitions. [2020-10-16 10:49:57,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:57,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:57,222 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:57,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:57,423 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:57,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:57,424 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-10-16 10:49:57,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:57,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171570610] [2020-10-16 10:49:57,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:57,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171570610] [2020-10-16 10:49:57,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485400879] [2020-10-16 10:49:57,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:57,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:49:57,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:57,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:57,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:49:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:57,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:49:57,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:49:57,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49285124] [2020-10-16 10:49:57,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:49:57,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:49:57,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:49:57,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:49:57,818 INFO L87 Difference]: Start difference. First operand 262 states and 685 transitions. Second operand 17 states. [2020-10-16 10:49:58,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:49:58,294 INFO L93 Difference]: Finished difference Result 350 states and 871 transitions. [2020-10-16 10:49:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:49:58,295 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:49:58,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:49:58,296 INFO L225 Difference]: With dead ends: 350 [2020-10-16 10:49:58,296 INFO L226 Difference]: Without dead ends: 347 [2020-10-16 10:49:58,296 INFO L677 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 [2020-10-16 10:49:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-16 10:49:58,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2020-10-16 10:49:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-16 10:49:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 696 transitions. [2020-10-16 10:49:58,300 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 696 transitions. Word has length 14 [2020-10-16 10:49:58,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:49:58,300 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 696 transitions. [2020-10-16 10:49:58,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:49:58,300 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 696 transitions. [2020-10-16 10:49:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:49:58,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:49:58,301 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:49:58,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:49:58,502 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:49:58,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:49:58,502 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-10-16 10:49:58,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:49:58,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119862941] [2020-10-16 10:49:58,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:49:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:49:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:49:58,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119862941] [2020-10-16 10:49:58,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953527284] [2020-10-16 10:49:58,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:49:58,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:49:58,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:49:58,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:49:58,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:03,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:03,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:03,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507954056] [2020-10-16 10:50:03,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:03,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:03,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:03,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-16 10:50:03,379 INFO L87 Difference]: Start difference. First operand 265 states and 696 transitions. Second operand 17 states. [2020-10-16 10:50:07,701 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 10:50:14,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:14,156 INFO L93 Difference]: Finished difference Result 380 states and 945 transitions. [2020-10-16 10:50:14,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:50:14,157 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:14,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:14,158 INFO L225 Difference]: With dead ends: 380 [2020-10-16 10:50:14,158 INFO L226 Difference]: Without dead ends: 375 [2020-10-16 10:50:14,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-10-16 10:50:14,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-16 10:50:14,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 266. [2020-10-16 10:50:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-16 10:50:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 698 transitions. [2020-10-16 10:50:14,163 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 698 transitions. Word has length 14 [2020-10-16 10:50:14,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:14,163 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 698 transitions. [2020-10-16 10:50:14,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:14,164 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 698 transitions. [2020-10-16 10:50:14,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:14,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:14,164 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:14,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-16 10:50:14,374 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:14,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:14,374 INFO L82 PathProgramCache]: Analyzing trace with hash -763559652, now seen corresponding path program 162 times [2020-10-16 10:50:14,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:14,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562494837] [2020-10-16 10:50:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:14,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562494837] [2020-10-16 10:50:14,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274989032] [2020-10-16 10:50:14,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:50:14,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:50:14,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:14,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:14,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:14,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:14,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:14,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489504791] [2020-10-16 10:50:14,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:14,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:14,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:14,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:14,793 INFO L87 Difference]: Start difference. First operand 266 states and 698 transitions. Second operand 17 states. [2020-10-16 10:50:15,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:15,340 INFO L93 Difference]: Finished difference Result 366 states and 912 transitions. [2020-10-16 10:50:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:50:15,341 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:15,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:15,342 INFO L225 Difference]: With dead ends: 366 [2020-10-16 10:50:15,342 INFO L226 Difference]: Without dead ends: 362 [2020-10-16 10:50:15,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:50:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-16 10:50:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 264. [2020-10-16 10:50:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-16 10:50:15,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 692 transitions. [2020-10-16 10:50:15,347 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 692 transitions. Word has length 14 [2020-10-16 10:50:15,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:15,347 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 692 transitions. [2020-10-16 10:50:15,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:15,347 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 692 transitions. [2020-10-16 10:50:15,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:15,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:15,347 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:15,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-16 10:50:15,552 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:15,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:15,552 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 163 times [2020-10-16 10:50:15,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:15,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801752466] [2020-10-16 10:50:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:15,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801752466] [2020-10-16 10:50:15,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511849266] [2020-10-16 10:50:15,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:50:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:15,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:15,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:18,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:18,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:18,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207870950] [2020-10-16 10:50:18,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:18,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:18,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:18,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:18,090 INFO L87 Difference]: Start difference. First operand 264 states and 692 transitions. Second operand 17 states. [2020-10-16 10:50:18,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:18,867 INFO L93 Difference]: Finished difference Result 357 states and 890 transitions. [2020-10-16 10:50:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:50:18,868 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:18,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:18,869 INFO L225 Difference]: With dead ends: 357 [2020-10-16 10:50:18,869 INFO L226 Difference]: Without dead ends: 354 [2020-10-16 10:50:18,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:50:18,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-16 10:50:18,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 266. [2020-10-16 10:50:18,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-16 10:50:18,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 700 transitions. [2020-10-16 10:50:18,873 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 700 transitions. Word has length 14 [2020-10-16 10:50:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:18,874 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 700 transitions. [2020-10-16 10:50:18,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:18,874 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 700 transitions. [2020-10-16 10:50:18,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:18,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:18,875 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:19,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-16 10:50:19,082 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:19,082 INFO L82 PathProgramCache]: Analyzing trace with hash -743032692, now seen corresponding path program 164 times [2020-10-16 10:50:19,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:19,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388804225] [2020-10-16 10:50:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:19,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388804225] [2020-10-16 10:50:19,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305570747] [2020-10-16 10:50:19,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:50:19,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:50:19,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:19,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:19,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:20,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:20,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:20,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125722644] [2020-10-16 10:50:20,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:20,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:20,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:20,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:20,362 INFO L87 Difference]: Start difference. First operand 266 states and 700 transitions. Second operand 17 states. [2020-10-16 10:50:24,774 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 10:50:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:39,536 INFO L93 Difference]: Finished difference Result 401 states and 995 transitions. [2020-10-16 10:50:39,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:50:39,537 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:39,537 INFO L225 Difference]: With dead ends: 401 [2020-10-16 10:50:39,537 INFO L226 Difference]: Without dead ends: 396 [2020-10-16 10:50:39,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-10-16 10:50:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-16 10:50:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 269. [2020-10-16 10:50:39,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-16 10:50:39,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 709 transitions. [2020-10-16 10:50:39,542 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 709 transitions. Word has length 14 [2020-10-16 10:50:39,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:39,542 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 709 transitions. [2020-10-16 10:50:39,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 709 transitions. [2020-10-16 10:50:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:39,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:39,543 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:39,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:39,744 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:39,744 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 165 times [2020-10-16 10:50:39,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:39,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270244382] [2020-10-16 10:50:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:39,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270244382] [2020-10-16 10:50:39,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971479570] [2020-10-16 10:50:39,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:50:39,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:50:39,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:39,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:39,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:40,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:40,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:40,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350563579] [2020-10-16 10:50:40,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:40,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:40,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:40,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:40,152 INFO L87 Difference]: Start difference. First operand 269 states and 709 transitions. Second operand 17 states. [2020-10-16 10:50:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:40,952 INFO L93 Difference]: Finished difference Result 352 states and 890 transitions. [2020-10-16 10:50:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:50:40,953 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:40,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:40,954 INFO L225 Difference]: With dead ends: 352 [2020-10-16 10:50:40,955 INFO L226 Difference]: Without dead ends: 349 [2020-10-16 10:50:40,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:50:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-16 10:50:40,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 271. [2020-10-16 10:50:40,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-16 10:50:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 716 transitions. [2020-10-16 10:50:40,959 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 716 transitions. Word has length 14 [2020-10-16 10:50:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:40,959 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 716 transitions. [2020-10-16 10:50:40,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:40,959 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 716 transitions. [2020-10-16 10:50:40,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:40,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:40,960 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:41,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:41,161 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:41,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:41,161 INFO L82 PathProgramCache]: Analyzing trace with hash -742349204, now seen corresponding path program 166 times [2020-10-16 10:50:41,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:41,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213839963] [2020-10-16 10:50:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:41,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213839963] [2020-10-16 10:50:41,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122268474] [2020-10-16 10:50:41,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:50:41,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:50:41,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:41,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:41,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:41,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:50:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:41,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:41,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:41,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969002336] [2020-10-16 10:50:41,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:41,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:41,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:41,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:41,561 INFO L87 Difference]: Start difference. First operand 271 states and 716 transitions. Second operand 17 states. [2020-10-16 10:50:42,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:42,547 INFO L93 Difference]: Finished difference Result 323 states and 827 transitions. [2020-10-16 10:50:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:50:42,548 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:42,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:42,548 INFO L225 Difference]: With dead ends: 323 [2020-10-16 10:50:42,548 INFO L226 Difference]: Without dead ends: 316 [2020-10-16 10:50:42,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=394, Invalid=796, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 10:50:42,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-16 10:50:42,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 271. [2020-10-16 10:50:42,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-16 10:50:42,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 713 transitions. [2020-10-16 10:50:42,553 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 713 transitions. Word has length 14 [2020-10-16 10:50:42,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:42,553 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 713 transitions. [2020-10-16 10:50:42,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 713 transitions. [2020-10-16 10:50:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:42,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:42,554 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:42,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-16 10:50:42,754 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:42,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:42,755 INFO L82 PathProgramCache]: Analyzing trace with hash -742348243, now seen corresponding path program 167 times [2020-10-16 10:50:42,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:42,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384927246] [2020-10-16 10:50:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:42,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384927246] [2020-10-16 10:50:42,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514354716] [2020-10-16 10:50:42,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:50:42,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:50:42,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:42,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:42,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:43,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:50:43,160 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:50:43,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:50:43,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:50:43,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:50:43,164 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:50:43,165 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:50:43,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:50:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:43,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:43,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:43,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826687905] [2020-10-16 10:50:43,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:43,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:43,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:43,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:50:43,235 INFO L87 Difference]: Start difference. First operand 271 states and 713 transitions. Second operand 17 states. [2020-10-16 10:50:44,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:44,447 INFO L93 Difference]: Finished difference Result 384 states and 973 transitions. [2020-10-16 10:50:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:50:44,449 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:44,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:44,450 INFO L225 Difference]: With dead ends: 384 [2020-10-16 10:50:44,450 INFO L226 Difference]: Without dead ends: 379 [2020-10-16 10:50:44,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:50:44,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-16 10:50:44,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 269. [2020-10-16 10:50:44,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-16 10:50:44,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 707 transitions. [2020-10-16 10:50:44,454 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 707 transitions. Word has length 14 [2020-10-16 10:50:44,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:44,455 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 707 transitions. [2020-10-16 10:50:44,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:44,455 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 707 transitions. [2020-10-16 10:50:44,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:44,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:44,455 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:44,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:50:44,656 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:44,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:44,657 INFO L82 PathProgramCache]: Analyzing trace with hash -742340772, now seen corresponding path program 168 times [2020-10-16 10:50:44,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:44,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64556165] [2020-10-16 10:50:44,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:44,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64556165] [2020-10-16 10:50:44,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151820131] [2020-10-16 10:50:44,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:50:44,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:50:44,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:50:44,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:44,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:50:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:48,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:50:48,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:50:48,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418231987] [2020-10-16 10:50:48,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:50:48,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:50:48,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:50:48,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-16 10:50:48,147 INFO L87 Difference]: Start difference. First operand 269 states and 707 transitions. Second operand 17 states. [2020-10-16 10:50:52,510 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-16 10:50:56,762 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 10:50:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:50:57,407 INFO L93 Difference]: Finished difference Result 403 states and 1011 transitions. [2020-10-16 10:50:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:50:57,408 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 10:50:57,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:50:57,408 INFO L225 Difference]: With dead ends: 403 [2020-10-16 10:50:57,408 INFO L226 Difference]: Without dead ends: 398 [2020-10-16 10:50:57,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-10-16 10:50:57,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-16 10:50:57,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 273. [2020-10-16 10:50:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-16 10:50:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 721 transitions. [2020-10-16 10:50:57,413 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 721 transitions. Word has length 14 [2020-10-16 10:50:57,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:50:57,413 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 721 transitions. [2020-10-16 10:50:57,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:50:57,413 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 721 transitions. [2020-10-16 10:50:57,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:50:57,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:50:57,413 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:50:57,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-16 10:50:57,614 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:50:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:50:57,615 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 169 times [2020-10-16 10:50:57,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:50:57,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776221068] [2020-10-16 10:50:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:50:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:50:57,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776221068] [2020-10-16 10:50:57,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633945195] [2020-10-16 10:50:57,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:50:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:50:57,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:50:57,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:05,833 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-16 10:51:05,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:05,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:05,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:05,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 10:51:05,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979563526] [2020-10-16 10:51:05,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:51:05,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:05,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:51:05,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=179, Unknown=6, NotChecked=0, Total=272 [2020-10-16 10:51:05,901 INFO L87 Difference]: Start difference. First operand 273 states and 721 transitions. Second operand 17 states. [2020-10-16 10:51:10,243 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-16 10:51:14,602 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 Received shutdown request... [2020-10-16 10:51:17,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:17,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:17,494 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 10:51:17,497 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 10:51:17,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 10:51:17 BasicIcfg [2020-10-16 10:51:17,498 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 10:51:17,499 INFO L168 Benchmark]: Toolchain (without parser) took 276836.44 ms. Allocated memory was 148.9 MB in the beginning and 192.4 MB in the end (delta: 43.5 MB). Free memory was 103.7 MB in the beginning and 84.5 MB in the end (delta: 19.2 MB). Peak memory consumption was 62.7 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:17,508 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-16 10:51:17,509 INFO L168 Benchmark]: CACSL2BoogieTranslator took 713.28 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 103.3 MB in the beginning and 165.4 MB in the end (delta: -62.1 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:17,509 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.26 ms. Allocated memory is still 205.0 MB. Free memory was 164.8 MB in the beginning and 162.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:17,511 INFO L168 Benchmark]: Boogie Preprocessor took 28.60 ms. Allocated memory is still 205.0 MB. Free memory was 162.9 MB in the beginning and 161.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:17,511 INFO L168 Benchmark]: RCFGBuilder took 512.24 ms. Allocated memory is still 205.0 MB. Free memory was 161.6 MB in the beginning and 140.9 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:17,512 INFO L168 Benchmark]: TraceAbstraction took 275520.16 ms. Allocated memory was 205.0 MB in the beginning and 192.4 MB in the end (delta: -12.6 MB). Free memory was 140.3 MB in the beginning and 84.5 MB in the end (delta: 55.8 MB). Peak memory consumption was 43.2 MB. Max. memory is 7.1 GB. [2020-10-16 10:51:17,513 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 713.28 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 103.3 MB in the beginning and 165.4 MB in the end (delta: -62.1 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.26 ms. Allocated memory is still 205.0 MB. Free memory was 164.8 MB in the beginning and 162.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.60 ms. Allocated memory is still 205.0 MB. Free memory was 162.9 MB in the beginning and 161.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 512.24 ms. Allocated memory is still 205.0 MB. Free memory was 161.6 MB in the beginning and 140.9 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 275520.16 ms. Allocated memory was 205.0 MB in the beginning and 192.4 MB in the end (delta: -12.6 MB). Free memory was 140.3 MB in the beginning and 84.5 MB in the end (delta: 55.8 MB). Peak memory consumption was 43.2 MB. Max. memory is 7.1 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: 1.2s, 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 (273states) and FLOYD_HOARE automaton (currently 15 states, 17 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 27 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 275.4s, OverallIterations: 198, TraceHistogramMax: 6, AutomataDifference: 141.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 2652 SDtfs, 18257 SDslu, 17728 SDs, 0 SdLazy, 12717 SolverSat, 4752 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 28.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5089 GetRequests, 954 SyntacticMatches, 170 SemanticMatches, 3964 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20942 ImplicationChecksByTransitivity, 183.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=274occurred in iteration=158, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 197 MinimizatonAttempts, 9760 StatesRemovedByMinimization, 196 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 82.5s InterpolantComputationTime, 4904 NumberOfCodeBlocks, 4902 NumberOfCodeBlocksAsserted, 600 NumberOfCheckSat, 4516 ConstructedInterpolants, 18 QuantifiedInterpolants, 481728 SizeOfPredicates, 188 NumberOfNonLiveVariables, 16617 ConjunctsInSsa, 1881 ConjunctsInUnsatCore, 388 InterpolantComputations, 10 PerfectInterpolantSequences, 30/1902 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