/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-12 03:01:43,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-12 03:01:43,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-12 03:01:43,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-12 03:01:43,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-12 03:01:43,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-12 03:01:43,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-12 03:01:43,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-12 03:01:43,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-12 03:01:43,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-12 03:01:43,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-12 03:01:43,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-12 03:01:43,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-12 03:01:43,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-12 03:01:43,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-12 03:01:43,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-12 03:01:43,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-12 03:01:43,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-12 03:01:43,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-12 03:01:43,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-12 03:01:43,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-12 03:01:43,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-12 03:01:43,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-12 03:01:43,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-12 03:01:43,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-12 03:01:43,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-12 03:01:43,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-12 03:01:43,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-12 03:01:43,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-12 03:01:43,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-12 03:01:43,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-12 03:01:43,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-12 03:01:43,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-12 03:01:43,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-12 03:01:43,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-12 03:01:43,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-12 03:01:43,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-12 03:01:43,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-12 03:01:43,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-12 03:01:43,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-12 03:01:43,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-12 03:01:43,364 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2020-11-12 03:01:43,421 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-12 03:01:43,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-12 03:01:43,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-12 03:01:43,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-12 03:01:43,427 INFO L138 SettingsManager]: * Use SBE=true [2020-11-12 03:01:43,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-12 03:01:43,428 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-12 03:01:43,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-12 03:01:43,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-12 03:01:43,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-12 03:01:43,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-12 03:01:43,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-12 03:01:43,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-12 03:01:43,430 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-12 03:01:43,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-12 03:01:43,431 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-12 03:01:43,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-12 03:01:43,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-12 03:01:43,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-12 03:01:43,432 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-12 03:01:43,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-12 03:01:43,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-12 03:01:43,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-12 03:01:43,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-12 03:01:43,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-12 03:01:43,433 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-12 03:01:43,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-12 03:01:43,434 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-12 03:01:43,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-12 03:01:43,434 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-12 03:01:43,435 INFO L138 SettingsManager]: * Sleep set reduction in concurrent analysis=DELAY_SET WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-12 03:01:43,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-12 03:01:43,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-12 03:01:43,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-12 03:01:43,941 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-12 03:01:43,942 INFO L275 PluginConnector]: CDTParser initialized [2020-11-12 03:01:43,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2020-11-12 03:01:44,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6750aa407/ceefd82927764b54aa91c59ebb9bcebc/FLAG471346ae9 [2020-11-12 03:01:44,702 INFO L306 CDTParser]: Found 1 translation units. [2020-11-12 03:01:44,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2020-11-12 03:01:44,725 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6750aa407/ceefd82927764b54aa91c59ebb9bcebc/FLAG471346ae9 [2020-11-12 03:01:44,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6750aa407/ceefd82927764b54aa91c59ebb9bcebc [2020-11-12 03:01:44,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-12 03:01:44,988 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-12 03:01:44,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-12 03:01:44,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-12 03:01:44,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-12 03:01:44,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 03:01:44" (1/1) ... [2020-11-12 03:01:45,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34539ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:44, skipping insertion in model container [2020-11-12 03:01:45,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 03:01:44" (1/1) ... [2020-11-12 03:01:45,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-12 03:01:45,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-12 03:01:45,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 03:01:45,501 INFO L203 MainTranslator]: Completed pre-run [2020-11-12 03:01:45,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 03:01:45,683 INFO L208 MainTranslator]: Completed translation [2020-11-12 03:01:45,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45 WrapperNode [2020-11-12 03:01:45,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-12 03:01:45,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-12 03:01:45,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-12 03:01:45,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-12 03:01:45,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-12 03:01:45,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-12 03:01:45,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-12 03:01:45,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-12 03:01:45,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... [2020-11-12 03:01:45,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-12 03:01:45,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-12 03:01:45,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-12 03:01:45,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-12 03:01:45,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-12 03:01:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-12 03:01:45,869 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-12 03:01:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-12 03:01:45,869 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-12 03:01:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-12 03:01:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-12 03:01:45,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-12 03:01:45,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-12 03:01:45,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-12 03:01:45,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-12 03:01:45,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-12 03:01:45,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-12 03:01:45,874 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-12 03:01:46,310 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-12 03:01:46,311 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-12 03:01:46,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 03:01:46 BoogieIcfgContainer [2020-11-12 03:01:46,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-12 03:01:46,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-12 03:01:46,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-12 03:01:46,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-12 03:01:46,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 03:01:44" (1/3) ... [2020-11-12 03:01:46,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1309f408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 03:01:46, skipping insertion in model container [2020-11-12 03:01:46,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:45" (2/3) ... [2020-11-12 03:01:46,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1309f408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 03:01:46, skipping insertion in model container [2020-11-12 03:01:46,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 03:01:46" (3/3) ... [2020-11-12 03:01:46,322 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2020-11-12 03:01:46,337 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-12 03:01:46,337 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-12 03:01:46,342 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-12 03:01:46,343 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-12 03:01:46,371 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,372 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,372 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,372 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,372 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,373 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,373 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,373 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,373 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,373 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,374 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,374 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,374 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,374 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,375 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,375 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,375 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,375 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,376 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,376 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,376 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,377 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,377 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,377 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,377 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,378 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,378 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,378 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,378 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,378 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,379 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,379 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,379 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,380 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,380 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,380 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,380 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,380 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,381 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,381 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,381 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,381 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,382 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,382 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,382 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,382 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,383 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,383 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,383 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,383 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,384 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,384 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,384 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,385 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,385 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,385 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,385 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,386 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,386 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,386 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,388 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,389 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,389 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,389 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,390 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,390 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,398 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,398 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,399 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,399 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,399 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,399 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:46,402 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-12 03:01:46,415 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-12 03:01:46,439 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-12 03:01:46,440 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-12 03:01:46,440 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-12 03:01:46,440 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-12 03:01:46,440 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-12 03:01:46,440 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-12 03:01:46,441 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-12 03:01:46,441 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-12 03:01:46,454 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2020-11-12 03:01:46,625 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:46,824 WARN L455 BasicCegarLoop]: Sleep Set Reduction Time: 195ms [2020-11-12 03:01:46,833 WARN L456 BasicCegarLoop]: Sleep set: input automaton has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:46,838 WARN L457 BasicCegarLoop]: Sleep set: output automaton has 2229 states, 1965 states have (on average 1.3572519083969465) internal successors, (2667), 2228 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:46,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 2229 states, 1965 states have (on average 1.3572519083969465) internal successors, (2667), 2228 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-12 03:01:46,851 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:46,852 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:46,853 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:46,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:46,859 INFO L82 PathProgramCache]: Analyzing trace with hash 792846013, now seen corresponding path program 1 times [2020-11-12 03:01:46,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:46,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966856000] [2020-11-12 03:01:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:47,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966856000] [2020-11-12 03:01:47,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 03:01:47,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-12 03:01:47,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752425628] [2020-11-12 03:01:47,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-12 03:01:47,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:47,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-12 03:01:47,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-12 03:01:47,474 INFO L87 Difference]: Start difference. First operand has 2229 states, 1965 states have (on average 1.3572519083969465) internal successors, (2667), 2228 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:47,683 INFO L93 Difference]: Finished difference Result 4034 states and 4505 transitions. [2020-11-12 03:01:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-12 03:01:47,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2020-11-12 03:01:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:47,709 INFO L225 Difference]: With dead ends: 4034 [2020-11-12 03:01:47,709 INFO L226 Difference]: Without dead ends: 1143 [2020-11-12 03:01:47,711 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-12 03:01:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2020-11-12 03:01:47,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 860. [2020-11-12 03:01:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 748 states have (on average 1.3489304812834224) internal successors, (1009), 859 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1009 transitions. [2020-11-12 03:01:47,859 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1009 transitions. Word has length 28 [2020-11-12 03:01:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:47,860 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1009 transitions. [2020-11-12 03:01:47,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:47,861 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1009 transitions. [2020-11-12 03:01:47,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-12 03:01:47,870 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:47,870 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:47,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-12 03:01:47,870 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:47,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:47,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1893217839, now seen corresponding path program 1 times [2020-11-12 03:01:47,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:47,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582134674] [2020-11-12 03:01:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:48,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582134674] [2020-11-12 03:01:48,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 03:01:48,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-12 03:01:48,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674419640] [2020-11-12 03:01:48,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 03:01:48,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:48,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 03:01:48,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-12 03:01:48,146 INFO L87 Difference]: Start difference. First operand 860 states and 1009 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:48,297 INFO L93 Difference]: Finished difference Result 1563 states and 1894 transitions. [2020-11-12 03:01:48,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-12 03:01:48,298 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2020-11-12 03:01:48,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:48,304 INFO L225 Difference]: With dead ends: 1563 [2020-11-12 03:01:48,305 INFO L226 Difference]: Without dead ends: 1323 [2020-11-12 03:01:48,306 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-12 03:01:48,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2020-11-12 03:01:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 877. [2020-11-12 03:01:48,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 765 states have (on average 1.3529411764705883) internal successors, (1035), 876 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1035 transitions. [2020-11-12 03:01:48,336 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1035 transitions. Word has length 33 [2020-11-12 03:01:48,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:48,336 INFO L481 AbstractCegarLoop]: Abstraction has 877 states and 1035 transitions. [2020-11-12 03:01:48,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:48,336 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1035 transitions. [2020-11-12 03:01:48,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-12 03:01:48,338 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:48,338 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:48,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-12 03:01:48,338 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:48,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:48,339 INFO L82 PathProgramCache]: Analyzing trace with hash -11030355, now seen corresponding path program 1 times [2020-11-12 03:01:48,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:48,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935248848] [2020-11-12 03:01:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:48,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935248848] [2020-11-12 03:01:48,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 03:01:48,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-12 03:01:48,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988989371] [2020-11-12 03:01:48,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 03:01:48,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:48,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 03:01:48,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-12 03:01:48,518 INFO L87 Difference]: Start difference. First operand 877 states and 1035 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:48,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:48,674 INFO L93 Difference]: Finished difference Result 1607 states and 2001 transitions. [2020-11-12 03:01:48,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-12 03:01:48,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2020-11-12 03:01:48,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:48,682 INFO L225 Difference]: With dead ends: 1607 [2020-11-12 03:01:48,683 INFO L226 Difference]: Without dead ends: 1303 [2020-11-12 03:01:48,684 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-11-12 03:01:48,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2020-11-12 03:01:48,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 964. [2020-11-12 03:01:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 852 states have (on average 1.3368544600938967) internal successors, (1139), 963 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1139 transitions. [2020-11-12 03:01:48,719 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1139 transitions. Word has length 33 [2020-11-12 03:01:48,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:48,720 INFO L481 AbstractCegarLoop]: Abstraction has 964 states and 1139 transitions. [2020-11-12 03:01:48,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:48,720 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1139 transitions. [2020-11-12 03:01:48,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 03:01:48,724 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:48,725 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:48,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-12 03:01:48,725 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:48,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:48,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1900462950, now seen corresponding path program 1 times [2020-11-12 03:01:48,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:48,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074658113] [2020-11-12 03:01:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:48,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074658113] [2020-11-12 03:01:48,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859506891] [2020-11-12 03:01:48,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:49,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-12 03:01:49,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:49,367 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:49,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:49,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:49,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-11-12 03:01:49,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862606832] [2020-11-12 03:01:49,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-12 03:01:49,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:49,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-12 03:01:49,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-12 03:01:49,414 INFO L87 Difference]: Start difference. First operand 964 states and 1139 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:49,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:49,691 INFO L93 Difference]: Finished difference Result 1971 states and 2405 transitions. [2020-11-12 03:01:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-12 03:01:49,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2020-11-12 03:01:49,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:49,701 INFO L225 Difference]: With dead ends: 1971 [2020-11-12 03:01:49,701 INFO L226 Difference]: Without dead ends: 1643 [2020-11-12 03:01:49,702 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:01:49,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2020-11-12 03:01:49,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 974. [2020-11-12 03:01:49,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 862 states have (on average 1.3468677494199537) internal successors, (1161), 973 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1161 transitions. [2020-11-12 03:01:49,738 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1161 transitions. Word has length 38 [2020-11-12 03:01:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:49,739 INFO L481 AbstractCegarLoop]: Abstraction has 974 states and 1161 transitions. [2020-11-12 03:01:49,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1161 transitions. [2020-11-12 03:01:49,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 03:01:49,741 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:49,741 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:49,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:49,951 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:49,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:49,952 INFO L82 PathProgramCache]: Analyzing trace with hash -2086129541, now seen corresponding path program 1 times [2020-11-12 03:01:49,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:49,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943559395] [2020-11-12 03:01:49,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:50,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943559395] [2020-11-12 03:01:50,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 03:01:50,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-12 03:01:50,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613546189] [2020-11-12 03:01:50,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-12 03:01:50,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:50,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-12 03:01:50,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-12 03:01:50,111 INFO L87 Difference]: Start difference. First operand 974 states and 1161 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:50,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:50,252 INFO L93 Difference]: Finished difference Result 1584 states and 1939 transitions. [2020-11-12 03:01:50,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-12 03:01:50,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2020-11-12 03:01:50,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:50,261 INFO L225 Difference]: With dead ends: 1584 [2020-11-12 03:01:50,261 INFO L226 Difference]: Without dead ends: 1432 [2020-11-12 03:01:50,262 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-11-12 03:01:50,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2020-11-12 03:01:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1011. [2020-11-12 03:01:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 899 states have (on average 1.3448275862068966) internal successors, (1209), 1010 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1209 transitions. [2020-11-12 03:01:50,318 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1209 transitions. Word has length 38 [2020-11-12 03:01:50,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:50,318 INFO L481 AbstractCegarLoop]: Abstraction has 1011 states and 1209 transitions. [2020-11-12 03:01:50,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:50,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1209 transitions. [2020-11-12 03:01:50,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 03:01:50,320 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:50,320 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:50,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-12 03:01:50,320 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:50,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:50,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1264515541, now seen corresponding path program 2 times [2020-11-12 03:01:50,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:50,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358883068] [2020-11-12 03:01:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:50,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358883068] [2020-11-12 03:01:50,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 03:01:50,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-12 03:01:50,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75943264] [2020-11-12 03:01:50,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-12 03:01:50,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:50,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-12 03:01:50,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-12 03:01:50,452 INFO L87 Difference]: Start difference. First operand 1011 states and 1209 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:50,670 INFO L93 Difference]: Finished difference Result 1856 states and 2322 transitions. [2020-11-12 03:01:50,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-12 03:01:50,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2020-11-12 03:01:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:50,679 INFO L225 Difference]: With dead ends: 1856 [2020-11-12 03:01:50,679 INFO L226 Difference]: Without dead ends: 1616 [2020-11-12 03:01:50,680 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-11-12 03:01:50,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2020-11-12 03:01:50,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1026. [2020-11-12 03:01:50,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 914 states have (on average 1.3435448577680524) internal successors, (1228), 1025 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1228 transitions. [2020-11-12 03:01:50,712 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1228 transitions. Word has length 38 [2020-11-12 03:01:50,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:50,712 INFO L481 AbstractCegarLoop]: Abstraction has 1026 states and 1228 transitions. [2020-11-12 03:01:50,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1228 transitions. [2020-11-12 03:01:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 03:01:50,714 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:50,714 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:50,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-12 03:01:50,715 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:50,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:50,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1498478156, now seen corresponding path program 1 times [2020-11-12 03:01:50,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:50,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666178366] [2020-11-12 03:01:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:50,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666178366] [2020-11-12 03:01:50,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013456348] [2020-11-12 03:01:50,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:50,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-12 03:01:50,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:51,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:51,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:51,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-11-12 03:01:51,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082923178] [2020-11-12 03:01:51,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-12 03:01:51,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:51,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-12 03:01:51,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-11-12 03:01:51,149 INFO L87 Difference]: Start difference. First operand 1026 states and 1228 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:51,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:51,393 INFO L93 Difference]: Finished difference Result 2083 states and 2691 transitions. [2020-11-12 03:01:51,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-12 03:01:51,394 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2020-11-12 03:01:51,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:51,402 INFO L225 Difference]: With dead ends: 2083 [2020-11-12 03:01:51,402 INFO L226 Difference]: Without dead ends: 1603 [2020-11-12 03:01:51,403 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:01:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2020-11-12 03:01:51,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1134. [2020-11-12 03:01:51,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1022 states have (on average 1.3209393346379648) internal successors, (1350), 1133 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:51,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1350 transitions. [2020-11-12 03:01:51,442 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1350 transitions. Word has length 38 [2020-11-12 03:01:51,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:51,442 INFO L481 AbstractCegarLoop]: Abstraction has 1134 states and 1350 transitions. [2020-11-12 03:01:51,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:51,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1350 transitions. [2020-11-12 03:01:51,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-12 03:01:51,445 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:51,445 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:51,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:51,661 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:51,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:51,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1859891804, now seen corresponding path program 1 times [2020-11-12 03:01:51,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:51,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909705644] [2020-11-12 03:01:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:51,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909705644] [2020-11-12 03:01:51,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142007073] [2020-11-12 03:01:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:51,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 03:01:51,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:52,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:52,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:52,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-12 03:01:52,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863512143] [2020-11-12 03:01:52,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 03:01:52,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:52,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 03:01:52,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-12 03:01:52,184 INFO L87 Difference]: Start difference. First operand 1134 states and 1350 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:52,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:52,414 INFO L93 Difference]: Finished difference Result 1786 states and 2178 transitions. [2020-11-12 03:01:52,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-12 03:01:52,415 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2020-11-12 03:01:52,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:52,424 INFO L225 Difference]: With dead ends: 1786 [2020-11-12 03:01:52,425 INFO L226 Difference]: Without dead ends: 1634 [2020-11-12 03:01:52,425 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:01:52,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2020-11-12 03:01:52,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1159. [2020-11-12 03:01:52,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1047 states have (on average 1.32378223495702) internal successors, (1386), 1158 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:52,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1386 transitions. [2020-11-12 03:01:52,458 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1386 transitions. Word has length 43 [2020-11-12 03:01:52,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:52,460 INFO L481 AbstractCegarLoop]: Abstraction has 1159 states and 1386 transitions. [2020-11-12 03:01:52,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:52,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1386 transitions. [2020-11-12 03:01:52,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-12 03:01:52,462 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:52,462 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:52,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:52,677 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:52,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:52,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1038277804, now seen corresponding path program 2 times [2020-11-12 03:01:52,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:52,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438991047] [2020-11-12 03:01:52,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:52,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438991047] [2020-11-12 03:01:52,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286623522] [2020-11-12 03:01:52,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:01:52,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:01:52,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:01:52,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:01:52,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:52,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:53,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:53,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-11-12 03:01:53,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325261883] [2020-11-12 03:01:53,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-12 03:01:53,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:53,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-12 03:01:53,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-11-12 03:01:53,008 INFO L87 Difference]: Start difference. First operand 1159 states and 1386 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:53,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:53,436 INFO L93 Difference]: Finished difference Result 2201 states and 2785 transitions. [2020-11-12 03:01:53,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-12 03:01:53,437 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2020-11-12 03:01:53,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:53,446 INFO L225 Difference]: With dead ends: 2201 [2020-11-12 03:01:53,447 INFO L226 Difference]: Without dead ends: 1873 [2020-11-12 03:01:53,447 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-11-12 03:01:53,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2020-11-12 03:01:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1184. [2020-11-12 03:01:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1072 states have (on average 1.3218283582089552) internal successors, (1417), 1183 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1417 transitions. [2020-11-12 03:01:53,488 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1417 transitions. Word has length 43 [2020-11-12 03:01:53,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:53,489 INFO L481 AbstractCegarLoop]: Abstraction has 1184 states and 1417 transitions. [2020-11-12 03:01:53,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:53,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1417 transitions. [2020-11-12 03:01:53,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-12 03:01:53,490 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:53,490 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:53,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:53,704 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:53,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:53,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1801206438, now seen corresponding path program 1 times [2020-11-12 03:01:53,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:53,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229017129] [2020-11-12 03:01:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:53,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229017129] [2020-11-12 03:01:53,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857180392] [2020-11-12 03:01:53,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:53,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 03:01:53,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:54,039 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:54,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:54,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-12 03:01:54,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390929803] [2020-11-12 03:01:54,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 03:01:54,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:54,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 03:01:54,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-12 03:01:54,051 INFO L87 Difference]: Start difference. First operand 1184 states and 1417 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:54,334 INFO L93 Difference]: Finished difference Result 1961 states and 2393 transitions. [2020-11-12 03:01:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-12 03:01:54,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2020-11-12 03:01:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:54,344 INFO L225 Difference]: With dead ends: 1961 [2020-11-12 03:01:54,345 INFO L226 Difference]: Without dead ends: 1809 [2020-11-12 03:01:54,345 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:01:54,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2020-11-12 03:01:54,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1233. [2020-11-12 03:01:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1121 states have (on average 1.3140053523639608) internal successors, (1473), 1232 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:54,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1473 transitions. [2020-11-12 03:01:54,389 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1473 transitions. Word has length 43 [2020-11-12 03:01:54,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:54,389 INFO L481 AbstractCegarLoop]: Abstraction has 1233 states and 1473 transitions. [2020-11-12 03:01:54,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:54,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1473 transitions. [2020-11-12 03:01:54,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-12 03:01:54,392 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:54,392 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:54,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-12 03:01:54,606 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:54,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:54,607 INFO L82 PathProgramCache]: Analyzing trace with hash -2146566760, now seen corresponding path program 2 times [2020-11-12 03:01:54,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:54,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425361025] [2020-11-12 03:01:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:54,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425361025] [2020-11-12 03:01:54,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110984111] [2020-11-12 03:01:54,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:01:54,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:01:54,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:01:54,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 03:01:54,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:54,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:01:54,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:54,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:54,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-12 03:01:54,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594801556] [2020-11-12 03:01:54,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 03:01:54,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:54,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 03:01:54,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-12 03:01:54,989 INFO L87 Difference]: Start difference. First operand 1233 states and 1473 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:55,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:55,734 INFO L93 Difference]: Finished difference Result 2612 states and 3329 transitions. [2020-11-12 03:01:55,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 03:01:55,735 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2020-11-12 03:01:55,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:55,746 INFO L225 Difference]: With dead ends: 2612 [2020-11-12 03:01:55,746 INFO L226 Difference]: Without dead ends: 2132 [2020-11-12 03:01:55,748 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=287, Invalid=973, Unknown=0, NotChecked=0, Total=1260 [2020-11-12 03:01:55,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2020-11-12 03:01:55,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 1323. [2020-11-12 03:01:55,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1211 states have (on average 1.3030553261767135) internal successors, (1578), 1322 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 1578 transitions. [2020-11-12 03:01:55,818 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 1578 transitions. Word has length 43 [2020-11-12 03:01:55,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:55,819 INFO L481 AbstractCegarLoop]: Abstraction has 1323 states and 1578 transitions. [2020-11-12 03:01:55,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:55,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 1578 transitions. [2020-11-12 03:01:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:01:55,822 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:55,822 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:56,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:56,036 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:56,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:56,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1095210246, now seen corresponding path program 2 times [2020-11-12 03:01:56,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:56,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650611320] [2020-11-12 03:01:56,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:56,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650611320] [2020-11-12 03:01:56,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906321804] [2020-11-12 03:01:56,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:01:56,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:01:56,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:01:56,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:01:56,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:56,560 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:56,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:56,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:56,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-11-12 03:01:56,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704221508] [2020-11-12 03:01:56,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 03:01:56,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:56,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 03:01:56,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-12 03:01:56,616 INFO L87 Difference]: Start difference. First operand 1323 states and 1578 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:56,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:56,994 INFO L93 Difference]: Finished difference Result 2399 states and 2922 transitions. [2020-11-12 03:01:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-12 03:01:56,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-12 03:01:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:57,006 INFO L225 Difference]: With dead ends: 2399 [2020-11-12 03:01:57,006 INFO L226 Difference]: Without dead ends: 2071 [2020-11-12 03:01:57,007 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2020-11-12 03:01:57,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2020-11-12 03:01:57,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1333. [2020-11-12 03:01:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1221 states have (on average 1.3104013104013104) internal successors, (1600), 1332 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:57,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1600 transitions. [2020-11-12 03:01:57,052 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1600 transitions. Word has length 48 [2020-11-12 03:01:57,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:57,052 INFO L481 AbstractCegarLoop]: Abstraction has 1333 states and 1600 transitions. [2020-11-12 03:01:57,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1600 transitions. [2020-11-12 03:01:57,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:01:57,055 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:57,055 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:57,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:57,270 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:57,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:57,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1403585051, now seen corresponding path program 3 times [2020-11-12 03:01:57,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:57,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172228203] [2020-11-12 03:01:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:57,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172228203] [2020-11-12 03:01:57,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178498874] [2020-11-12 03:01:57,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:01:57,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 03:01:57,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:01:57,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:01:57,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:57,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:57,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:57,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-11-12 03:01:57,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424753856] [2020-11-12 03:01:57,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-12 03:01:57,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:57,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-12 03:01:57,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-12 03:01:57,572 INFO L87 Difference]: Start difference. First operand 1333 states and 1600 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:57,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:57,748 INFO L93 Difference]: Finished difference Result 2076 states and 2536 transitions. [2020-11-12 03:01:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-12 03:01:57,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-12 03:01:57,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:57,759 INFO L225 Difference]: With dead ends: 2076 [2020-11-12 03:01:57,759 INFO L226 Difference]: Without dead ends: 1924 [2020-11-12 03:01:57,759 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-11-12 03:01:57,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-11-12 03:01:57,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1358. [2020-11-12 03:01:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1246 states have (on average 1.3130016051364366) internal successors, (1636), 1357 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:57,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 1636 transitions. [2020-11-12 03:01:57,804 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 1636 transitions. Word has length 48 [2020-11-12 03:01:57,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:57,804 INFO L481 AbstractCegarLoop]: Abstraction has 1358 states and 1636 transitions. [2020-11-12 03:01:57,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:57,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 1636 transitions. [2020-11-12 03:01:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:01:57,806 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:57,806 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:58,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-12 03:01:58,022 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:58,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash -2069768245, now seen corresponding path program 4 times [2020-11-12 03:01:58,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:58,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123603308] [2020-11-12 03:01:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:58,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123603308] [2020-11-12 03:01:58,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641036492] [2020-11-12 03:01:58,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:01:58,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:01:58,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:01:58,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:01:58,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:58,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:01:58,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:58,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:58,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 03:01:58,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133532012] [2020-11-12 03:01:58,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 03:01:58,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:58,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 03:01:58,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-11-12 03:01:58,462 INFO L87 Difference]: Start difference. First operand 1358 states and 1636 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:59,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:59,043 INFO L93 Difference]: Finished difference Result 2497 states and 3160 transitions. [2020-11-12 03:01:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 03:01:59,049 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-12 03:01:59,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:59,059 INFO L225 Difference]: With dead ends: 2497 [2020-11-12 03:01:59,060 INFO L226 Difference]: Without dead ends: 2169 [2020-11-12 03:01:59,060 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2020-11-12 03:01:59,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2020-11-12 03:01:59,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1358. [2020-11-12 03:01:59,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1246 states have (on average 1.3130016051364366) internal successors, (1636), 1357 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:59,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 1636 transitions. [2020-11-12 03:01:59,104 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 1636 transitions. Word has length 48 [2020-11-12 03:01:59,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:59,104 INFO L481 AbstractCegarLoop]: Abstraction has 1358 states and 1636 transitions. [2020-11-12 03:01:59,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:59,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 1636 transitions. [2020-11-12 03:01:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:01:59,106 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:59,106 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:59,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:59,322 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:59,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:59,323 INFO L82 PathProgramCache]: Analyzing trace with hash 769715997, now seen corresponding path program 1 times [2020-11-12 03:01:59,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:59,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256381007] [2020-11-12 03:01:59,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:59,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256381007] [2020-11-12 03:01:59,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947556005] [2020-11-12 03:01:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:59,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:01:59,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:59,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:59,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:59,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 03:01:59,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159510853] [2020-11-12 03:01:59,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 03:01:59,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:59,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 03:01:59,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-11-12 03:01:59,704 INFO L87 Difference]: Start difference. First operand 1358 states and 1636 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:00,058 INFO L93 Difference]: Finished difference Result 2210 states and 2702 transitions. [2020-11-12 03:02:00,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-12 03:02:00,061 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-12 03:02:00,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:00,071 INFO L225 Difference]: With dead ends: 2210 [2020-11-12 03:02:00,071 INFO L226 Difference]: Without dead ends: 2058 [2020-11-12 03:02:00,072 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2020-11-12 03:02:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2020-11-12 03:02:00,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1358. [2020-11-12 03:02:00,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1246 states have (on average 1.3130016051364366) internal successors, (1636), 1357 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 1636 transitions. [2020-11-12 03:02:00,111 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 1636 transitions. Word has length 48 [2020-11-12 03:02:00,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:00,111 INFO L481 AbstractCegarLoop]: Abstraction has 1358 states and 1636 transitions. [2020-11-12 03:02:00,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 1636 transitions. [2020-11-12 03:02:00,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:02:00,113 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:00,113 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:00,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-12 03:02:00,328 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:00,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:00,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1116910095, now seen corresponding path program 2 times [2020-11-12 03:02:00,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:00,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108842105] [2020-11-12 03:02:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:00,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108842105] [2020-11-12 03:02:00,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987918444] [2020-11-12 03:02:00,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:00,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:00,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:00,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:02:00,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:00,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:00,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:00,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:00,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 03:02:00,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467581688] [2020-11-12 03:02:00,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 03:02:00,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:00,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 03:02:00,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-11-12 03:02:00,778 INFO L87 Difference]: Start difference. First operand 1358 states and 1636 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:01,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:01,578 INFO L93 Difference]: Finished difference Result 2696 states and 3401 transitions. [2020-11-12 03:02:01,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 03:02:01,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-12 03:02:01,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:01,599 INFO L225 Difference]: With dead ends: 2696 [2020-11-12 03:02:01,599 INFO L226 Difference]: Without dead ends: 2368 [2020-11-12 03:02:01,600 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=336, Invalid=1146, Unknown=0, NotChecked=0, Total=1482 [2020-11-12 03:02:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2020-11-12 03:02:01,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 1358. [2020-11-12 03:02:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1246 states have (on average 1.3130016051364366) internal successors, (1636), 1357 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 1636 transitions. [2020-11-12 03:02:01,683 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 1636 transitions. Word has length 48 [2020-11-12 03:02:01,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:01,683 INFO L481 AbstractCegarLoop]: Abstraction has 1358 states and 1636 transitions. [2020-11-12 03:02:01,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:01,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 1636 transitions. [2020-11-12 03:02:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:02:01,687 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:01,688 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:01,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-12 03:02:01,902 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:01,903 INFO L82 PathProgramCache]: Analyzing trace with hash 945366927, now seen corresponding path program 3 times [2020-11-12 03:02:01,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:01,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301510680] [2020-11-12 03:02:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:02,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301510680] [2020-11-12 03:02:02,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057261765] [2020-11-12 03:02:02,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:02,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-12 03:02:02,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:02,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:02:02,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:02,269 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:02,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:02,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 03:02:02,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220566201] [2020-11-12 03:02:02,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 03:02:02,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:02,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 03:02:02,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-11-12 03:02:02,283 INFO L87 Difference]: Start difference. First operand 1358 states and 1636 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:02,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:02,694 INFO L93 Difference]: Finished difference Result 2370 states and 2894 transitions. [2020-11-12 03:02:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-12 03:02:02,695 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-12 03:02:02,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:02,707 INFO L225 Difference]: With dead ends: 2370 [2020-11-12 03:02:02,708 INFO L226 Difference]: Without dead ends: 2218 [2020-11-12 03:02:02,708 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2020-11-12 03:02:02,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2020-11-12 03:02:02,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1412. [2020-11-12 03:02:02,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1300 states have (on average 1.31) internal successors, (1703), 1411 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 1703 transitions. [2020-11-12 03:02:02,756 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 1703 transitions. Word has length 48 [2020-11-12 03:02:02,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:02,757 INFO L481 AbstractCegarLoop]: Abstraction has 1412 states and 1703 transitions. [2020-11-12 03:02:02,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:02,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 1703 transitions. [2020-11-12 03:02:02,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:02:02,762 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:02,762 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:02,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-12 03:02:02,977 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:02,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:02,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1345409599, now seen corresponding path program 4 times [2020-11-12 03:02:02,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:02,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396500840] [2020-11-12 03:02:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:03,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396500840] [2020-11-12 03:02:03,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198120313] [2020-11-12 03:02:03,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:03,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:02:03,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:03,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:02:03,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:03,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:03,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:03,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:03,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 03:02:03,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014210292] [2020-11-12 03:02:03,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 03:02:03,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:03,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 03:02:03,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-11-12 03:02:03,334 INFO L87 Difference]: Start difference. First operand 1412 states and 1703 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:04,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:04,493 INFO L93 Difference]: Finished difference Result 3197 states and 4049 transitions. [2020-11-12 03:02:04,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 03:02:04,496 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-12 03:02:04,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:04,503 INFO L225 Difference]: With dead ends: 3197 [2020-11-12 03:02:04,503 INFO L226 Difference]: Without dead ends: 2717 [2020-11-12 03:02:04,504 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=488, Invalid=1674, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 03:02:04,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2020-11-12 03:02:04,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 1497. [2020-11-12 03:02:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1385 states have (on average 1.3025270758122744) internal successors, (1804), 1496 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 1804 transitions. [2020-11-12 03:02:04,554 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 1804 transitions. Word has length 48 [2020-11-12 03:02:04,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:04,555 INFO L481 AbstractCegarLoop]: Abstraction has 1497 states and 1804 transitions. [2020-11-12 03:02:04,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:04,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 1804 transitions. [2020-11-12 03:02:04,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:04,557 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:04,558 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:04,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-12 03:02:04,774 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:04,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:04,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1996849156, now seen corresponding path program 5 times [2020-11-12 03:02:04,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:04,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51687523] [2020-11-12 03:02:04,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:04,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51687523] [2020-11-12 03:02:04,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078405466] [2020-11-12 03:02:04,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:05,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 03:02:05,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:05,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:05,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:05,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:05,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:05,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:05,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706095776] [2020-11-12 03:02:05,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:05,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:05,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:05,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:05,215 INFO L87 Difference]: Start difference. First operand 1497 states and 1804 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:05,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:05,455 INFO L93 Difference]: Finished difference Result 2315 states and 2825 transitions. [2020-11-12 03:02:05,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-12 03:02:05,456 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:05,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:05,458 INFO L225 Difference]: With dead ends: 2315 [2020-11-12 03:02:05,459 INFO L226 Difference]: Without dead ends: 2163 [2020-11-12 03:02:05,459 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2020-11-12 03:02:05,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2020-11-12 03:02:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1522. [2020-11-12 03:02:05,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1410 states have (on average 1.3049645390070923) internal successors, (1840), 1521 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:05,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 1840 transitions. [2020-11-12 03:02:05,492 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 1840 transitions. Word has length 53 [2020-11-12 03:02:05,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:05,492 INFO L481 AbstractCegarLoop]: Abstraction has 1522 states and 1840 transitions. [2020-11-12 03:02:05,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:05,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 1840 transitions. [2020-11-12 03:02:05,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:05,494 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:05,494 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:05,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:05,708 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:05,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:05,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1476504140, now seen corresponding path program 6 times [2020-11-12 03:02:05,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:05,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494118840] [2020-11-12 03:02:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:05,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494118840] [2020-11-12 03:02:05,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222717081] [2020-11-12 03:02:05,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:05,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 03:02:05,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:05,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:02:05,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:06,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:06,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:06,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2020-11-12 03:02:06,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729103035] [2020-11-12 03:02:06,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 03:02:06,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:06,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 03:02:06,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-11-12 03:02:06,044 INFO L87 Difference]: Start difference. First operand 1522 states and 1840 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:06,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:06,517 INFO L93 Difference]: Finished difference Result 2826 states and 3554 transitions. [2020-11-12 03:02:06,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 03:02:06,518 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:06,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:06,522 INFO L225 Difference]: With dead ends: 2826 [2020-11-12 03:02:06,522 INFO L226 Difference]: Without dead ends: 2498 [2020-11-12 03:02:06,522 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2020-11-12 03:02:06,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2020-11-12 03:02:06,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 1522. [2020-11-12 03:02:06,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1410 states have (on average 1.3049645390070923) internal successors, (1840), 1521 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:06,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 1840 transitions. [2020-11-12 03:02:06,558 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 1840 transitions. Word has length 53 [2020-11-12 03:02:06,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:06,558 INFO L481 AbstractCegarLoop]: Abstraction has 1522 states and 1840 transitions. [2020-11-12 03:02:06,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:06,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 1840 transitions. [2020-11-12 03:02:06,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:06,560 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:06,560 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:06,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:06,774 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:06,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1362980102, now seen corresponding path program 5 times [2020-11-12 03:02:06,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:06,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705423876] [2020-11-12 03:02:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:06,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705423876] [2020-11-12 03:02:06,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928526720] [2020-11-12 03:02:06,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:07,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 03:02:07,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:07,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:07,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:07,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:07,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:07,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:07,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216837010] [2020-11-12 03:02:07,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:07,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:07,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:07,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:07,381 INFO L87 Difference]: Start difference. First operand 1522 states and 1840 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:07,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:07,916 INFO L93 Difference]: Finished difference Result 2529 states and 3087 transitions. [2020-11-12 03:02:07,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-12 03:02:07,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:07,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:07,920 INFO L225 Difference]: With dead ends: 2529 [2020-11-12 03:02:07,920 INFO L226 Difference]: Without dead ends: 2377 [2020-11-12 03:02:07,921 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-11-12 03:02:07,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2020-11-12 03:02:07,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 1522. [2020-11-12 03:02:07,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1410 states have (on average 1.3049645390070923) internal successors, (1840), 1521 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:07,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 1840 transitions. [2020-11-12 03:02:07,953 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 1840 transitions. Word has length 53 [2020-11-12 03:02:07,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:07,953 INFO L481 AbstractCegarLoop]: Abstraction has 1522 states and 1840 transitions. [2020-11-12 03:02:07,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:07,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 1840 transitions. [2020-11-12 03:02:07,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:07,958 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:07,959 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:08,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:08,171 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:08,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:08,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1710174200, now seen corresponding path program 6 times [2020-11-12 03:02:08,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:08,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183400083] [2020-11-12 03:02:08,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:08,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183400083] [2020-11-12 03:02:08,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209958005] [2020-11-12 03:02:08,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:08,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 03:02:08,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:08,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:08,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:08,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:08,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:08,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:08,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:08,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701283833] [2020-11-12 03:02:08,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:08,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:08,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:08,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:08,669 INFO L87 Difference]: Start difference. First operand 1522 states and 1840 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:09,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:09,615 INFO L93 Difference]: Finished difference Result 2926 states and 3682 transitions. [2020-11-12 03:02:09,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 03:02:09,615 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:09,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:09,618 INFO L225 Difference]: With dead ends: 2926 [2020-11-12 03:02:09,619 INFO L226 Difference]: Without dead ends: 2598 [2020-11-12 03:02:09,619 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=399, Invalid=1407, Unknown=0, NotChecked=0, Total=1806 [2020-11-12 03:02:09,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2020-11-12 03:02:09,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 1522. [2020-11-12 03:02:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1410 states have (on average 1.3049645390070923) internal successors, (1840), 1521 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:09,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 1840 transitions. [2020-11-12 03:02:09,667 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 1840 transitions. Word has length 53 [2020-11-12 03:02:09,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:09,668 INFO L481 AbstractCegarLoop]: Abstraction has 1522 states and 1840 transitions. [2020-11-12 03:02:09,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:09,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 1840 transitions. [2020-11-12 03:02:09,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:09,670 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:09,670 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:09,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-12 03:02:09,884 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:09,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:09,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1538631032, now seen corresponding path program 7 times [2020-11-12 03:02:09,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:09,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880590004] [2020-11-12 03:02:09,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:10,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880590004] [2020-11-12 03:02:10,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151653277] [2020-11-12 03:02:10,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:10,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:10,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:10,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:10,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:10,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:10,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917136122] [2020-11-12 03:02:10,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:10,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:10,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:10,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:10,357 INFO L87 Difference]: Start difference. First operand 1522 states and 1840 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:10,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:10,990 INFO L93 Difference]: Finished difference Result 2617 states and 3199 transitions. [2020-11-12 03:02:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-12 03:02:10,991 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:10,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:10,995 INFO L225 Difference]: With dead ends: 2617 [2020-11-12 03:02:10,995 INFO L226 Difference]: Without dead ends: 2465 [2020-11-12 03:02:10,995 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-11-12 03:02:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2020-11-12 03:02:11,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1516. [2020-11-12 03:02:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1404 states have (on average 1.3041310541310542) internal successors, (1831), 1515 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 1831 transitions. [2020-11-12 03:02:11,027 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 1831 transitions. Word has length 53 [2020-11-12 03:02:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:11,027 INFO L481 AbstractCegarLoop]: Abstraction has 1516 states and 1831 transitions. [2020-11-12 03:02:11,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 1831 transitions. [2020-11-12 03:02:11,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:11,030 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:11,030 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:11,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-12 03:02:11,246 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:11,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:11,246 INFO L82 PathProgramCache]: Analyzing trace with hash -752145494, now seen corresponding path program 8 times [2020-11-12 03:02:11,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:11,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966893448] [2020-11-12 03:02:11,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:11,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966893448] [2020-11-12 03:02:11,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168861091] [2020-11-12 03:02:11,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:11,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:11,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:11,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:11,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:11,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:11,807 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:11,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:11,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:11,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737360420] [2020-11-12 03:02:11,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:11,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:11,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:11,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:11,828 INFO L87 Difference]: Start difference. First operand 1516 states and 1831 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:13,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:13,284 INFO L93 Difference]: Finished difference Result 3025 states and 3807 transitions. [2020-11-12 03:02:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 03:02:13,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:13,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:13,288 INFO L225 Difference]: With dead ends: 3025 [2020-11-12 03:02:13,288 INFO L226 Difference]: Without dead ends: 2697 [2020-11-12 03:02:13,289 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=543, Invalid=1809, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 03:02:13,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2020-11-12 03:02:13,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 1511. [2020-11-12 03:02:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1399 states have (on average 1.300929235167977) internal successors, (1820), 1510 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:13,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 1820 transitions. [2020-11-12 03:02:13,324 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 1820 transitions. Word has length 53 [2020-11-12 03:02:13,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:13,324 INFO L481 AbstractCegarLoop]: Abstraction has 1511 states and 1820 transitions. [2020-11-12 03:02:13,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:13,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 1820 transitions. [2020-11-12 03:02:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:13,327 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:13,327 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:13,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-12 03:02:13,540 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:13,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:13,541 INFO L82 PathProgramCache]: Analyzing trace with hash -753227568, now seen corresponding path program 9 times [2020-11-12 03:02:13,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:13,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536681277] [2020-11-12 03:02:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:13,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536681277] [2020-11-12 03:02:13,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990390934] [2020-11-12 03:02:13,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:13,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 03:02:13,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:13,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:13,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:13,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:13,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:13,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:13,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575256483] [2020-11-12 03:02:13,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:13,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:13,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:13,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:13,990 INFO L87 Difference]: Start difference. First operand 1511 states and 1820 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:14,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:14,723 INFO L93 Difference]: Finished difference Result 2964 states and 3651 transitions. [2020-11-12 03:02:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-12 03:02:14,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:14,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:14,729 INFO L225 Difference]: With dead ends: 2964 [2020-11-12 03:02:14,729 INFO L226 Difference]: Without dead ends: 2660 [2020-11-12 03:02:14,730 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2020-11-12 03:02:14,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2020-11-12 03:02:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 1611. [2020-11-12 03:02:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1499 states have (on average 1.294863242161441) internal successors, (1941), 1610 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:14,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 1941 transitions. [2020-11-12 03:02:14,764 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 1941 transitions. Word has length 53 [2020-11-12 03:02:14,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:14,765 INFO L481 AbstractCegarLoop]: Abstraction has 1611 states and 1941 transitions. [2020-11-12 03:02:14,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:14,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 1941 transitions. [2020-11-12 03:02:14,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:14,767 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:14,768 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:14,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-12 03:02:14,981 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:14,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1009872878, now seen corresponding path program 10 times [2020-11-12 03:02:14,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:14,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130433070] [2020-11-12 03:02:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:15,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130433070] [2020-11-12 03:02:15,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441464782] [2020-11-12 03:02:15,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:15,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:02:15,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:15,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:02:15,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:15,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:15,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:15,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:15,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613494392] [2020-11-12 03:02:15,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:15,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:15,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:15,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:15,431 INFO L87 Difference]: Start difference. First operand 1611 states and 1941 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:16,072 INFO L93 Difference]: Finished difference Result 2892 states and 3521 transitions. [2020-11-12 03:02:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 03:02:16,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:16,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:16,077 INFO L225 Difference]: With dead ends: 2892 [2020-11-12 03:02:16,078 INFO L226 Difference]: Without dead ends: 2740 [2020-11-12 03:02:16,078 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2020-11-12 03:02:16,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2020-11-12 03:02:16,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1636. [2020-11-12 03:02:16,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1524 states have (on average 1.2939632545931758) internal successors, (1972), 1635 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1972 transitions. [2020-11-12 03:02:16,114 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1972 transitions. Word has length 53 [2020-11-12 03:02:16,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:16,114 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 1972 transitions. [2020-11-12 03:02:16,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:16,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1972 transitions. [2020-11-12 03:02:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:16,117 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:16,117 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:16,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-12 03:02:16,331 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:16,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:16,332 INFO L82 PathProgramCache]: Analyzing trace with hash 482396802, now seen corresponding path program 11 times [2020-11-12 03:02:16,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:16,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242926046] [2020-11-12 03:02:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:16,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242926046] [2020-11-12 03:02:16,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733662572] [2020-11-12 03:02:16,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:16,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 03:02:16,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:16,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:16,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:16,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:16,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:16,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:16,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 03:02:16,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818829488] [2020-11-12 03:02:16,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 03:02:16,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:16,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 03:02:16,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-11-12 03:02:16,791 INFO L87 Difference]: Start difference. First operand 1636 states and 1972 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:18,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:18,607 INFO L93 Difference]: Finished difference Result 4354 states and 5602 transitions. [2020-11-12 03:02:18,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-12 03:02:18,608 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:18,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:18,614 INFO L225 Difference]: With dead ends: 4354 [2020-11-12 03:02:18,615 INFO L226 Difference]: Without dead ends: 3610 [2020-11-12 03:02:18,616 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=771, Invalid=2889, Unknown=0, NotChecked=0, Total=3660 [2020-11-12 03:02:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2020-11-12 03:02:18,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 1866. [2020-11-12 03:02:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1754 states have (on average 1.2850627137970354) internal successors, (2254), 1865 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 2254 transitions. [2020-11-12 03:02:18,660 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 2254 transitions. Word has length 53 [2020-11-12 03:02:18,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:18,661 INFO L481 AbstractCegarLoop]: Abstraction has 1866 states and 2254 transitions. [2020-11-12 03:02:18,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:18,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 2254 transitions. [2020-11-12 03:02:18,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:18,664 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:18,664 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:18,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:18,879 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:18,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:18,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1917297602, now seen corresponding path program 12 times [2020-11-12 03:02:18,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:18,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249959208] [2020-11-12 03:02:18,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:19,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249959208] [2020-11-12 03:02:19,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079897367] [2020-11-12 03:02:19,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:19,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 03:02:19,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:19,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:19,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:19,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:19,290 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:19,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:19,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:19,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449668126] [2020-11-12 03:02:19,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:19,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:19,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:19,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:19,300 INFO L87 Difference]: Start difference. First operand 1866 states and 2254 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:20,945 INFO L93 Difference]: Finished difference Result 3828 states and 4795 transitions. [2020-11-12 03:02:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-12 03:02:20,945 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:20,954 INFO L225 Difference]: With dead ends: 3828 [2020-11-12 03:02:20,954 INFO L226 Difference]: Without dead ends: 3500 [2020-11-12 03:02:20,955 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=771, Invalid=2535, Unknown=0, NotChecked=0, Total=3306 [2020-11-12 03:02:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2020-11-12 03:02:20,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 1886. [2020-11-12 03:02:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1774 states have (on average 1.286358511837655) internal successors, (2282), 1885 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 2282 transitions. [2020-11-12 03:02:20,996 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 2282 transitions. Word has length 53 [2020-11-12 03:02:20,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:20,997 INFO L481 AbstractCegarLoop]: Abstraction has 1886 states and 2282 transitions. [2020-11-12 03:02:20,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:20,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 2282 transitions. [2020-11-12 03:02:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:21,000 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:21,000 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:21,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-12 03:02:21,216 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:21,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:21,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1381804116, now seen corresponding path program 13 times [2020-11-12 03:02:21,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:21,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695119958] [2020-11-12 03:02:21,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:21,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695119958] [2020-11-12 03:02:21,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121117417] [2020-11-12 03:02:21,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:21,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:21,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:21,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:21,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:21,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:21,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014231122] [2020-11-12 03:02:21,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:21,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:21,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:21,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:21,610 INFO L87 Difference]: Start difference. First operand 1886 states and 2282 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:22,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:22,040 INFO L93 Difference]: Finished difference Result 3130 states and 3841 transitions. [2020-11-12 03:02:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-12 03:02:22,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:22,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:22,044 INFO L225 Difference]: With dead ends: 3130 [2020-11-12 03:02:22,044 INFO L226 Difference]: Without dead ends: 2978 [2020-11-12 03:02:22,045 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2020-11-12 03:02:22,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2978 states. [2020-11-12 03:02:22,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2978 to 1897. [2020-11-12 03:02:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1785 states have (on average 1.2879551820728292) internal successors, (2299), 1896 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2299 transitions. [2020-11-12 03:02:22,084 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2299 transitions. Word has length 53 [2020-11-12 03:02:22,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:22,084 INFO L481 AbstractCegarLoop]: Abstraction has 1897 states and 2299 transitions. [2020-11-12 03:02:22,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:22,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2299 transitions. [2020-11-12 03:02:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:22,088 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:22,088 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:22,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-12 03:02:22,303 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:22,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:22,303 INFO L82 PathProgramCache]: Analyzing trace with hash -518764706, now seen corresponding path program 14 times [2020-11-12 03:02:22,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:22,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662680462] [2020-11-12 03:02:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:22,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662680462] [2020-11-12 03:02:22,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375336787] [2020-11-12 03:02:22,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:22,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:22,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:22,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:22,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:22,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:22,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:22,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:22,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540998500] [2020-11-12 03:02:22,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:22,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:22,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:22,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:22,690 INFO L87 Difference]: Start difference. First operand 1897 states and 2299 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:23,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:23,347 INFO L93 Difference]: Finished difference Result 3311 states and 4060 transitions. [2020-11-12 03:02:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-12 03:02:23,353 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:23,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:23,357 INFO L225 Difference]: With dead ends: 3311 [2020-11-12 03:02:23,357 INFO L226 Difference]: Without dead ends: 3159 [2020-11-12 03:02:23,358 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2020-11-12 03:02:23,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2020-11-12 03:02:23,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 1867. [2020-11-12 03:02:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1755 states have (on average 1.286039886039886) internal successors, (2257), 1866 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:23,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2257 transitions. [2020-11-12 03:02:23,426 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2257 transitions. Word has length 53 [2020-11-12 03:02:23,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:23,426 INFO L481 AbstractCegarLoop]: Abstraction has 1867 states and 2257 transitions. [2020-11-12 03:02:23,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2257 transitions. [2020-11-12 03:02:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:23,432 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:23,432 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:23,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:23,632 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:23,633 INFO L82 PathProgramCache]: Analyzing trace with hash -382888138, now seen corresponding path program 15 times [2020-11-12 03:02:23,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:23,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108690819] [2020-11-12 03:02:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:23,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108690819] [2020-11-12 03:02:23,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299502158] [2020-11-12 03:02:23,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:23,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 03:02:23,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:23,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:23,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:23,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:24,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:24,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:24,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:24,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218660726] [2020-11-12 03:02:24,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:24,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:24,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:24,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:24,008 INFO L87 Difference]: Start difference. First operand 1867 states and 2257 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:25,206 INFO L93 Difference]: Finished difference Result 3715 states and 4648 transitions. [2020-11-12 03:02:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-12 03:02:25,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:25,211 INFO L225 Difference]: With dead ends: 3715 [2020-11-12 03:02:25,211 INFO L226 Difference]: Without dead ends: 3387 [2020-11-12 03:02:25,212 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2020-11-12 03:02:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3387 states. [2020-11-12 03:02:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3387 to 1875. [2020-11-12 03:02:25,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1763 states have (on average 1.2858763471355643) internal successors, (2267), 1874 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:25,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2267 transitions. [2020-11-12 03:02:25,253 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2267 transitions. Word has length 53 [2020-11-12 03:02:25,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:25,253 INFO L481 AbstractCegarLoop]: Abstraction has 1875 states and 2267 transitions. [2020-11-12 03:02:25,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:25,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2267 transitions. [2020-11-12 03:02:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:25,257 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:25,257 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:25,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:25,472 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:25,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:25,472 INFO L82 PathProgramCache]: Analyzing trace with hash -702095706, now seen corresponding path program 3 times [2020-11-12 03:02:25,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:25,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782086609] [2020-11-12 03:02:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:25,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782086609] [2020-11-12 03:02:25,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282715510] [2020-11-12 03:02:25,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:25,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-12 03:02:25,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:25,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:25,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:25,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-12 03:02:25,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-11-12 03:02:25,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383532834] [2020-11-12 03:02:25,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-12 03:02:25,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:25,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-12 03:02:25,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-11-12 03:02:25,705 INFO L87 Difference]: Start difference. First operand 1875 states and 2267 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:25,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:25,949 INFO L93 Difference]: Finished difference Result 3187 states and 3902 transitions. [2020-11-12 03:02:25,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-12 03:02:25,953 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:25,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:25,956 INFO L225 Difference]: With dead ends: 3187 [2020-11-12 03:02:25,956 INFO L226 Difference]: Without dead ends: 3166 [2020-11-12 03:02:25,956 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2020-11-12 03:02:25,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2020-11-12 03:02:26,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 2368. [2020-11-12 03:02:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2280 states have (on average 1.3859649122807018) internal successors, (3160), 2367 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 3160 transitions. [2020-11-12 03:02:26,013 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 3160 transitions. Word has length 58 [2020-11-12 03:02:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:26,014 INFO L481 AbstractCegarLoop]: Abstraction has 2368 states and 3160 transitions. [2020-11-12 03:02:26,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 3160 transitions. [2020-11-12 03:02:26,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:26,018 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:26,018 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:26,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-12 03:02:26,231 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:26,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:26,232 INFO L82 PathProgramCache]: Analyzing trace with hash -393720901, now seen corresponding path program 7 times [2020-11-12 03:02:26,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:26,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496495477] [2020-11-12 03:02:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:26,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496495477] [2020-11-12 03:02:26,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736340689] [2020-11-12 03:02:26,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:26,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:26,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:26,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:26,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:26,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:26,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050198469] [2020-11-12 03:02:26,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:26,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:26,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:26,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:26,772 INFO L87 Difference]: Start difference. First operand 2368 states and 3160 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:27,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:27,102 INFO L93 Difference]: Finished difference Result 3226 states and 4196 transitions. [2020-11-12 03:02:27,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-12 03:02:27,103 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:27,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:27,106 INFO L225 Difference]: With dead ends: 3226 [2020-11-12 03:02:27,106 INFO L226 Difference]: Without dead ends: 3093 [2020-11-12 03:02:27,106 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-11-12 03:02:27,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2020-11-12 03:02:27,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 2352. [2020-11-12 03:02:27,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2264 states have (on average 1.3869257950530036) internal successors, (3140), 2351 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 3140 transitions. [2020-11-12 03:02:27,149 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 3140 transitions. Word has length 58 [2020-11-12 03:02:27,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:27,149 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 3140 transitions. [2020-11-12 03:02:27,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:27,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 3140 transitions. [2020-11-12 03:02:27,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:27,154 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:27,154 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:27,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:27,368 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:27,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:27,368 INFO L82 PathProgramCache]: Analyzing trace with hash 427893099, now seen corresponding path program 8 times [2020-11-12 03:02:27,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:27,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381945270] [2020-11-12 03:02:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:27,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381945270] [2020-11-12 03:02:27,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564005528] [2020-11-12 03:02:27,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:27,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:27,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:27,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 03:02:27,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:27,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:27,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:27,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2020-11-12 03:02:27,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352642877] [2020-11-12 03:02:27,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 03:02:27,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:27,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 03:02:27,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-11-12 03:02:27,722 INFO L87 Difference]: Start difference. First operand 2352 states and 3140 transitions. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:28,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:28,334 INFO L93 Difference]: Finished difference Result 4295 states and 5615 transitions. [2020-11-12 03:02:28,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-12 03:02:28,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:28,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:28,338 INFO L225 Difference]: With dead ends: 4295 [2020-11-12 03:02:28,339 INFO L226 Difference]: Without dead ends: 3949 [2020-11-12 03:02:28,339 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2020-11-12 03:02:28,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3949 states. [2020-11-12 03:02:28,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3949 to 2384. [2020-11-12 03:02:28,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2296 states have (on average 1.384581881533101) internal successors, (3179), 2383 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 3179 transitions. [2020-11-12 03:02:28,433 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 3179 transitions. Word has length 58 [2020-11-12 03:02:28,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:28,434 INFO L481 AbstractCegarLoop]: Abstraction has 2384 states and 3179 transitions. [2020-11-12 03:02:28,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:28,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 3179 transitions. [2020-11-12 03:02:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:28,438 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:28,439 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:28,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-12 03:02:28,650 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:28,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:28,652 INFO L82 PathProgramCache]: Analyzing trace with hash -851939025, now seen corresponding path program 16 times [2020-11-12 03:02:28,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:28,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713557944] [2020-11-12 03:02:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:28,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713557944] [2020-11-12 03:02:28,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348510095] [2020-11-12 03:02:28,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:28,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:02:28,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:28,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 03:02:28,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:29,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:29,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:29,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:02:29,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425313708] [2020-11-12 03:02:29,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:02:29,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:29,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:02:29,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:02:29,676 INFO L87 Difference]: Start difference. First operand 2384 states and 3179 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:30,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:30,421 INFO L93 Difference]: Finished difference Result 3957 states and 5174 transitions. [2020-11-12 03:02:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 03:02:30,422 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:30,426 INFO L225 Difference]: With dead ends: 3957 [2020-11-12 03:02:30,426 INFO L226 Difference]: Without dead ends: 3715 [2020-11-12 03:02:30,427 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=273, Invalid=917, Unknown=0, NotChecked=0, Total=1190 [2020-11-12 03:02:30,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3715 states. [2020-11-12 03:02:30,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3715 to 2409. [2020-11-12 03:02:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2321 states have (on average 1.3830245583800087) internal successors, (3210), 2408 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 3210 transitions. [2020-11-12 03:02:30,472 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 3210 transitions. Word has length 58 [2020-11-12 03:02:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:30,473 INFO L481 AbstractCegarLoop]: Abstraction has 2409 states and 3210 transitions. [2020-11-12 03:02:30,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 3210 transitions. [2020-11-12 03:02:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:30,476 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:30,477 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:30,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:30,678 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:30,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:30,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1152251745, now seen corresponding path program 17 times [2020-11-12 03:02:30,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:30,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818326824] [2020-11-12 03:02:30,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:30,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818326824] [2020-11-12 03:02:30,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688819620] [2020-11-12 03:02:30,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:30,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 03:02:30,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:30,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:30,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:31,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:31,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:31,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:31,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:31,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512520925] [2020-11-12 03:02:31,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:31,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:31,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:31,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:31,334 INFO L87 Difference]: Start difference. First operand 2409 states and 3210 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:33,403 INFO L93 Difference]: Finished difference Result 5418 states and 7247 transitions. [2020-11-12 03:02:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-12 03:02:33,404 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:33,408 INFO L225 Difference]: With dead ends: 5418 [2020-11-12 03:02:33,408 INFO L226 Difference]: Without dead ends: 4764 [2020-11-12 03:02:33,409 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=720, Invalid=2702, Unknown=0, NotChecked=0, Total=3422 [2020-11-12 03:02:33,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4764 states. [2020-11-12 03:02:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4764 to 2453. [2020-11-12 03:02:33,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2365 states have (on average 1.387737843551797) internal successors, (3282), 2452 states have internal predecessors, (3282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3282 transitions. [2020-11-12 03:02:33,453 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3282 transitions. Word has length 58 [2020-11-12 03:02:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:33,454 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 3282 transitions. [2020-11-12 03:02:33,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3282 transitions. [2020-11-12 03:02:33,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:33,458 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:33,458 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:33,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-12 03:02:33,674 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:33,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:33,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1151169671, now seen corresponding path program 18 times [2020-11-12 03:02:33,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:33,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501998679] [2020-11-12 03:02:33,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:33,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501998679] [2020-11-12 03:02:33,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561968197] [2020-11-12 03:02:33,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:33,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 03:02:33,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:33,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:33,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:34,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:34,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:34,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:02:34,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042337063] [2020-11-12 03:02:34,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:02:34,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:34,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:02:34,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:02:34,253 INFO L87 Difference]: Start difference. First operand 2453 states and 3282 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:35,152 INFO L93 Difference]: Finished difference Result 4325 states and 5686 transitions. [2020-11-12 03:02:35,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-12 03:02:35,153 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:35,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:35,157 INFO L225 Difference]: With dead ends: 4325 [2020-11-12 03:02:35,157 INFO L226 Difference]: Without dead ends: 4033 [2020-11-12 03:02:35,158 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 03:02:35,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4033 states. [2020-11-12 03:02:35,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4033 to 2483. [2020-11-12 03:02:35,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2395 states have (on average 1.3878914405010438) internal successors, (3324), 2482 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 3324 transitions. [2020-11-12 03:02:35,201 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 3324 transitions. Word has length 58 [2020-11-12 03:02:35,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:35,202 INFO L481 AbstractCegarLoop]: Abstraction has 2483 states and 3324 transitions. [2020-11-12 03:02:35,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 3324 transitions. [2020-11-12 03:02:35,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:35,206 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:35,206 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:35,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-12 03:02:35,420 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:35,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:35,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1908173255, now seen corresponding path program 19 times [2020-11-12 03:02:35,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:35,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050422537] [2020-11-12 03:02:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:35,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050422537] [2020-11-12 03:02:35,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41783488] [2020-11-12 03:02:35,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:35,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:35,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:35,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:35,979 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:35,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:35,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:36,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:36,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:36,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998435726] [2020-11-12 03:02:36,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:36,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:36,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:36,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:36,039 INFO L87 Difference]: Start difference. First operand 2483 states and 3324 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:38,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:38,527 INFO L93 Difference]: Finished difference Result 5499 states and 7337 transitions. [2020-11-12 03:02:38,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-12 03:02:38,528 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:38,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:38,532 INFO L225 Difference]: With dead ends: 5499 [2020-11-12 03:02:38,532 INFO L226 Difference]: Without dead ends: 4841 [2020-11-12 03:02:38,534 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=961, Invalid=3461, Unknown=0, NotChecked=0, Total=4422 [2020-11-12 03:02:38,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4841 states. [2020-11-12 03:02:38,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4841 to 2534. [2020-11-12 03:02:38,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2446 states have (on average 1.3871627146361407) internal successors, (3393), 2533 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 3393 transitions. [2020-11-12 03:02:38,584 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 3393 transitions. Word has length 58 [2020-11-12 03:02:38,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:38,584 INFO L481 AbstractCegarLoop]: Abstraction has 2534 states and 3393 transitions. [2020-11-12 03:02:38,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:38,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 3393 transitions. [2020-11-12 03:02:38,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:38,589 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:38,589 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:38,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-12 03:02:38,804 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:38,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:38,804 INFO L82 PathProgramCache]: Analyzing trace with hash -239846355, now seen corresponding path program 20 times [2020-11-12 03:02:38,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:38,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260823594] [2020-11-12 03:02:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:38,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260823594] [2020-11-12 03:02:38,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582758251] [2020-11-12 03:02:38,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:39,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:39,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:39,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:39,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:39,308 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:39,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:39,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:02:39,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483713901] [2020-11-12 03:02:39,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:02:39,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:39,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:02:39,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:02:39,322 INFO L87 Difference]: Start difference. First operand 2534 states and 3393 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:40,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:40,427 INFO L93 Difference]: Finished difference Result 4103 states and 5324 transitions. [2020-11-12 03:02:40,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-12 03:02:40,428 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:40,431 INFO L225 Difference]: With dead ends: 4103 [2020-11-12 03:02:40,432 INFO L226 Difference]: Without dead ends: 3911 [2020-11-12 03:02:40,432 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2020-11-12 03:02:40,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3911 states. [2020-11-12 03:02:40,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3911 to 2524. [2020-11-12 03:02:40,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2436 states have (on average 1.3838259441707716) internal successors, (3371), 2523 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:40,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 3371 transitions. [2020-11-12 03:02:40,491 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 3371 transitions. Word has length 58 [2020-11-12 03:02:40,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:40,492 INFO L481 AbstractCegarLoop]: Abstraction has 2524 states and 3371 transitions. [2020-11-12 03:02:40,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:40,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 3371 transitions. [2020-11-12 03:02:40,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:40,496 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:40,496 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:40,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-12 03:02:40,696 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:40,697 INFO L82 PathProgramCache]: Analyzing trace with hash -103969787, now seen corresponding path program 21 times [2020-11-12 03:02:40,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:40,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212971384] [2020-11-12 03:02:40,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:40,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212971384] [2020-11-12 03:02:40,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570503220] [2020-11-12 03:02:40,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:40,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 03:02:40,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:40,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:40,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:41,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:41,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:41,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:41,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:41,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:41,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:41,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668108838] [2020-11-12 03:02:41,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:41,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:41,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:41,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:41,399 INFO L87 Difference]: Start difference. First operand 2524 states and 3371 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:43,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:43,909 INFO L93 Difference]: Finished difference Result 5557 states and 7423 transitions. [2020-11-12 03:02:43,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-12 03:02:43,910 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:43,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:43,914 INFO L225 Difference]: With dead ends: 5557 [2020-11-12 03:02:43,914 INFO L226 Difference]: Without dead ends: 4967 [2020-11-12 03:02:43,915 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=823, Invalid=2959, Unknown=0, NotChecked=0, Total=3782 [2020-11-12 03:02:43,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4967 states. [2020-11-12 03:02:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4967 to 2530. [2020-11-12 03:02:43,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2442 states have (on average 1.386158886158886) internal successors, (3385), 2529 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3385 transitions. [2020-11-12 03:02:43,962 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3385 transitions. Word has length 58 [2020-11-12 03:02:43,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:43,962 INFO L481 AbstractCegarLoop]: Abstraction has 2530 states and 3385 transitions. [2020-11-12 03:02:43,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:43,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3385 transitions. [2020-11-12 03:02:43,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:43,966 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:43,966 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:44,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-12 03:02:44,182 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:44,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:44,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1237364593, now seen corresponding path program 22 times [2020-11-12 03:02:44,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:44,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26683913] [2020-11-12 03:02:44,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:44,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26683913] [2020-11-12 03:02:44,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328850897] [2020-11-12 03:02:44,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:44,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:02:44,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:44,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 03:02:44,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:44,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:44,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:44,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:02:44,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773810603] [2020-11-12 03:02:44,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:02:44,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:44,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:02:44,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:02:44,704 INFO L87 Difference]: Start difference. First operand 2530 states and 3385 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:45,850 INFO L93 Difference]: Finished difference Result 4757 states and 6274 transitions. [2020-11-12 03:02:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-12 03:02:45,851 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:45,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:45,856 INFO L225 Difference]: With dead ends: 4757 [2020-11-12 03:02:45,856 INFO L226 Difference]: Without dead ends: 4415 [2020-11-12 03:02:45,857 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=436, Invalid=1286, Unknown=0, NotChecked=0, Total=1722 [2020-11-12 03:02:45,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4415 states. [2020-11-12 03:02:45,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4415 to 2669. [2020-11-12 03:02:45,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 2581 states have (on average 1.3831848120883379) internal successors, (3570), 2668 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:45,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 3570 transitions. [2020-11-12 03:02:45,897 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 3570 transitions. Word has length 58 [2020-11-12 03:02:45,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:45,897 INFO L481 AbstractCegarLoop]: Abstraction has 2669 states and 3570 transitions. [2020-11-12 03:02:45,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:45,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 3570 transitions. [2020-11-12 03:02:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:45,901 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:45,902 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:46,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-12 03:02:46,116 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:46,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:46,116 INFO L82 PathProgramCache]: Analyzing trace with hash 522593123, now seen corresponding path program 23 times [2020-11-12 03:02:46,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:46,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597660463] [2020-11-12 03:02:46,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:46,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597660463] [2020-11-12 03:02:46,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438152700] [2020-11-12 03:02:46,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:46,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 03:02:46,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:46,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:46,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:46,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:46,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:46,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:02:46,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116638051] [2020-11-12 03:02:46,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:02:46,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:46,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:02:46,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:02:46,652 INFO L87 Difference]: Start difference. First operand 2669 states and 3570 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:47,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:47,604 INFO L93 Difference]: Finished difference Result 4767 states and 6240 transitions. [2020-11-12 03:02:47,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 03:02:47,605 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:47,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:47,609 INFO L225 Difference]: With dead ends: 4767 [2020-11-12 03:02:47,609 INFO L226 Difference]: Without dead ends: 4475 [2020-11-12 03:02:47,609 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=411, Invalid=1229, Unknown=0, NotChecked=0, Total=1640 [2020-11-12 03:02:47,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4475 states. [2020-11-12 03:02:47,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4475 to 2679. [2020-11-12 03:02:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2679 states, 2591 states have (on average 1.3863373214974912) internal successors, (3592), 2678 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:47,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2679 states to 2679 states and 3592 transitions. [2020-11-12 03:02:47,641 INFO L78 Accepts]: Start accepts. Automaton has 2679 states and 3592 transitions. Word has length 58 [2020-11-12 03:02:47,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:47,641 INFO L481 AbstractCegarLoop]: Abstraction has 2679 states and 3592 transitions. [2020-11-12 03:02:47,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:47,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2679 states and 3592 transitions. [2020-11-12 03:02:47,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:47,646 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:47,646 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:47,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-12 03:02:47,847 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:47,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:47,847 INFO L82 PathProgramCache]: Analyzing trace with hash 769687391, now seen corresponding path program 24 times [2020-11-12 03:02:47,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:47,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836386617] [2020-11-12 03:02:47,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:48,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836386617] [2020-11-12 03:02:48,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304148165] [2020-11-12 03:02:48,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:48,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 03:02:48,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:48,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-12 03:02:48,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:48,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:48,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:48,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-11-12 03:02:48,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021447383] [2020-11-12 03:02:48,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 03:02:48,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:48,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 03:02:48,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-11-12 03:02:48,308 INFO L87 Difference]: Start difference. First operand 2679 states and 3592 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:49,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:49,872 INFO L93 Difference]: Finished difference Result 6183 states and 8303 transitions. [2020-11-12 03:02:49,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-12 03:02:49,873 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:49,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:49,878 INFO L225 Difference]: With dead ends: 6183 [2020-11-12 03:02:49,878 INFO L226 Difference]: Without dead ends: 5444 [2020-11-12 03:02:49,879 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=549, Invalid=2313, Unknown=0, NotChecked=0, Total=2862 [2020-11-12 03:02:49,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5444 states. [2020-11-12 03:02:49,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5444 to 2739. [2020-11-12 03:02:49,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2651 states have (on average 1.3866465484722745) internal successors, (3676), 2738 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:49,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3676 transitions. [2020-11-12 03:02:49,919 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3676 transitions. Word has length 58 [2020-11-12 03:02:49,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:49,920 INFO L481 AbstractCegarLoop]: Abstraction has 2739 states and 3676 transitions. [2020-11-12 03:02:49,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:49,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3676 transitions. [2020-11-12 03:02:49,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:49,924 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:49,924 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:50,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:50,131 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:50,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:50,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2090379105, now seen corresponding path program 25 times [2020-11-12 03:02:50,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:50,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603390520] [2020-11-12 03:02:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:50,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:50,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603390520] [2020-11-12 03:02:50,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220977519] [2020-11-12 03:02:50,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:50,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:50,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:50,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:50,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:50,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:50,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:50,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:50,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:50,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941816214] [2020-11-12 03:02:50,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:50,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:50,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:50,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:50,771 INFO L87 Difference]: Start difference. First operand 2739 states and 3676 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:54,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:54,169 INFO L93 Difference]: Finished difference Result 7491 states and 10253 transitions. [2020-11-12 03:02:54,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-12 03:02:54,173 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:54,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:54,181 INFO L225 Difference]: With dead ends: 7491 [2020-11-12 03:02:54,181 INFO L226 Difference]: Without dead ends: 6337 [2020-11-12 03:02:54,182 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2234 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1372, Invalid=5108, Unknown=0, NotChecked=0, Total=6480 [2020-11-12 03:02:54,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6337 states. [2020-11-12 03:02:54,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6337 to 2873. [2020-11-12 03:02:54,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2873 states, 2785 states have (on average 1.3824057450628366) internal successors, (3850), 2872 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 3850 transitions. [2020-11-12 03:02:54,244 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 3850 transitions. Word has length 58 [2020-11-12 03:02:54,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:54,244 INFO L481 AbstractCegarLoop]: Abstraction has 2873 states and 3850 transitions. [2020-11-12 03:02:54,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 3850 transitions. [2020-11-12 03:02:54,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:54,249 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:54,249 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:54,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-12 03:02:54,450 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:54,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1385632533, now seen corresponding path program 26 times [2020-11-12 03:02:54,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:54,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915496098] [2020-11-12 03:02:54,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:54,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915496098] [2020-11-12 03:02:54,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164878708] [2020-11-12 03:02:54,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:54,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:54,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:54,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:54,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:54,949 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:54,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:54,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:02:54,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675361245] [2020-11-12 03:02:54,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:02:54,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:54,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:02:54,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:02:54,958 INFO L87 Difference]: Start difference. First operand 2873 states and 3850 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:56,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:56,582 INFO L93 Difference]: Finished difference Result 5865 states and 7602 transitions. [2020-11-12 03:02:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-12 03:02:56,583 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:56,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:56,590 INFO L225 Difference]: With dead ends: 5865 [2020-11-12 03:02:56,590 INFO L226 Difference]: Without dead ends: 5573 [2020-11-12 03:02:56,590 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=652, Invalid=2210, Unknown=0, NotChecked=0, Total=2862 [2020-11-12 03:02:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5573 states. [2020-11-12 03:02:56,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5573 to 2864. [2020-11-12 03:02:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2776 states have (on average 1.3757204610951008) internal successors, (3819), 2863 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:56,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 3819 transitions. [2020-11-12 03:02:56,631 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 3819 transitions. Word has length 58 [2020-11-12 03:02:56,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:56,631 INFO L481 AbstractCegarLoop]: Abstraction has 2864 states and 3819 transitions. [2020-11-12 03:02:56,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 3819 transitions. [2020-11-12 03:02:56,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:56,635 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:56,635 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:56,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:56,849 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:56,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:56,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1521509101, now seen corresponding path program 27 times [2020-11-12 03:02:56,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:56,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003867131] [2020-11-12 03:02:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:57,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003867131] [2020-11-12 03:02:57,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647853076] [2020-11-12 03:02:57,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:02:57,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 03:02:57,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:57,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:57,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:57,316 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:57,343 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:57,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:57,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:57,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045008851] [2020-11-12 03:02:57,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:57,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:57,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:57,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:57,352 INFO L87 Difference]: Start difference. First operand 2864 states and 3819 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:59,813 INFO L93 Difference]: Finished difference Result 7208 states and 9598 transitions. [2020-11-12 03:02:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-11-12 03:02:59,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:59,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:59,820 INFO L225 Difference]: With dead ends: 7208 [2020-11-12 03:02:59,820 INFO L226 Difference]: Without dead ends: 6449 [2020-11-12 03:02:59,821 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1206, Invalid=4344, Unknown=0, NotChecked=0, Total=5550 [2020-11-12 03:02:59,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2020-11-12 03:02:59,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 2918. [2020-11-12 03:02:59,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2918 states, 2830 states have (on average 1.3798586572438163) internal successors, (3905), 2917 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:59,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2918 states to 2918 states and 3905 transitions. [2020-11-12 03:02:59,865 INFO L78 Accepts]: Start accepts. Automaton has 2918 states and 3905 transitions. Word has length 58 [2020-11-12 03:02:59,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:59,866 INFO L481 AbstractCegarLoop]: Abstraction has 2918 states and 3905 transitions. [2020-11-12 03:02:59,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:59,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2918 states and 3905 transitions. [2020-11-12 03:02:59,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:59,870 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:59,870 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:00,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-12 03:03:00,074 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:00,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:00,074 INFO L82 PathProgramCache]: Analyzing trace with hash 940897161, now seen corresponding path program 3 times [2020-11-12 03:03:00,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:00,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440184503] [2020-11-12 03:03:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:00,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440184503] [2020-11-12 03:03:00,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870974076] [2020-11-12 03:03:00,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:03:00,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-12 03:03:00,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:00,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:00,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:00,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:00,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:00,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:00,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187377802] [2020-11-12 03:03:00,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:00,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:00,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:00,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:00,633 INFO L87 Difference]: Start difference. First operand 2918 states and 3905 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:01,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:01,386 INFO L93 Difference]: Finished difference Result 5029 states and 6670 transitions. [2020-11-12 03:03:01,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-12 03:03:01,387 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:01,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:01,391 INFO L225 Difference]: With dead ends: 5029 [2020-11-12 03:03:01,391 INFO L226 Difference]: Without dead ends: 4687 [2020-11-12 03:03:01,392 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=366, Invalid=966, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 03:03:01,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2020-11-12 03:03:01,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 2973. [2020-11-12 03:03:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2885 states have (on average 1.3788561525129983) internal successors, (3978), 2972 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:01,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3978 transitions. [2020-11-12 03:03:01,433 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3978 transitions. Word has length 58 [2020-11-12 03:03:01,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:01,433 INFO L481 AbstractCegarLoop]: Abstraction has 2973 states and 3978 transitions. [2020-11-12 03:03:01,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:01,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3978 transitions. [2020-11-12 03:03:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:01,436 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:01,436 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:01,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:01,637 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:01,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:01,638 INFO L82 PathProgramCache]: Analyzing trace with hash -704957315, now seen corresponding path program 28 times [2020-11-12 03:03:01,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:01,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630485018] [2020-11-12 03:03:01,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:01,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630485018] [2020-11-12 03:03:01,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379624084] [2020-11-12 03:03:01,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:03:01,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:03:01,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:01,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:01,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:02,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:02,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:02,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:03:02,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715703123] [2020-11-12 03:03:02,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:03:02,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:02,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:03:02,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:03:02,135 INFO L87 Difference]: Start difference. First operand 2973 states and 3978 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:02,883 INFO L93 Difference]: Finished difference Result 4985 states and 6570 transitions. [2020-11-12 03:03:02,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-12 03:03:02,884 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:02,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:02,888 INFO L225 Difference]: With dead ends: 4985 [2020-11-12 03:03:02,888 INFO L226 Difference]: Without dead ends: 4693 [2020-11-12 03:03:02,889 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2020-11-12 03:03:02,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4693 states. [2020-11-12 03:03:02,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4693 to 2998. [2020-11-12 03:03:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2910 states have (on average 1.3776632302405498) internal successors, (4009), 2997 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 4009 transitions. [2020-11-12 03:03:02,926 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 4009 transitions. Word has length 58 [2020-11-12 03:03:02,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:02,926 INFO L481 AbstractCegarLoop]: Abstraction has 2998 states and 4009 transitions. [2020-11-12 03:03:02,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:02,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 4009 transitions. [2020-11-12 03:03:02,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:02,929 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:02,929 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:03,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-12 03:03:03,130 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:03,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:03,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1927695613, now seen corresponding path program 29 times [2020-11-12 03:03:03,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:03,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796459351] [2020-11-12 03:03:03,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:03,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796459351] [2020-11-12 03:03:03,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613898817] [2020-11-12 03:03:03,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:03:03,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 03:03:03,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:03,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:03,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:03,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:03,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:03,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:03:03,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83994917] [2020-11-12 03:03:03,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:03:03,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:03,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:03:03,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:03:03,616 INFO L87 Difference]: Start difference. First operand 2998 states and 4009 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:04,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:04,090 INFO L93 Difference]: Finished difference Result 4480 states and 5863 transitions. [2020-11-12 03:03:04,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-12 03:03:04,091 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:04,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:04,095 INFO L225 Difference]: With dead ends: 4480 [2020-11-12 03:03:04,096 INFO L226 Difference]: Without dead ends: 4288 [2020-11-12 03:03:04,096 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2020-11-12 03:03:04,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2020-11-12 03:03:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 2998. [2020-11-12 03:03:04,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2910 states have (on average 1.3776632302405498) internal successors, (4009), 2997 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:04,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 4009 transitions. [2020-11-12 03:03:04,130 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 4009 transitions. Word has length 58 [2020-11-12 03:03:04,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:04,130 INFO L481 AbstractCegarLoop]: Abstraction has 2998 states and 4009 transitions. [2020-11-12 03:03:04,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:04,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 4009 transitions. [2020-11-12 03:03:04,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:04,134 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:04,134 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:04,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-12 03:03:04,334 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:04,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:04,335 INFO L82 PathProgramCache]: Analyzing trace with hash -637239175, now seen corresponding path program 4 times [2020-11-12 03:03:04,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:04,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054917162] [2020-11-12 03:03:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:04,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054917162] [2020-11-12 03:03:04,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097928780] [2020-11-12 03:03:04,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:04,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:03:04,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:04,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 03:03:04,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:04,831 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:04,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:04,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:04,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:04,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360071873] [2020-11-12 03:03:04,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:04,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:04,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:04,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:04,907 INFO L87 Difference]: Start difference. First operand 2998 states and 4009 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:07,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:07,023 INFO L93 Difference]: Finished difference Result 7083 states and 9497 transitions. [2020-11-12 03:03:07,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-12 03:03:07,024 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:07,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:07,029 INFO L225 Difference]: With dead ends: 7083 [2020-11-12 03:03:07,029 INFO L226 Difference]: Without dead ends: 6167 [2020-11-12 03:03:07,030 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=966, Invalid=3456, Unknown=0, NotChecked=0, Total=4422 [2020-11-12 03:03:07,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6167 states. [2020-11-12 03:03:07,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6167 to 3038. [2020-11-12 03:03:07,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 2950 states have (on average 1.3708474576271186) internal successors, (4044), 3037 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 4044 transitions. [2020-11-12 03:03:07,068 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 4044 transitions. Word has length 58 [2020-11-12 03:03:07,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:07,068 INFO L481 AbstractCegarLoop]: Abstraction has 3038 states and 4044 transitions. [2020-11-12 03:03:07,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 4044 transitions. [2020-11-12 03:03:07,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:07,072 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:07,072 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:07,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-12 03:03:07,274 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:07,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:07,275 INFO L82 PathProgramCache]: Analyzing trace with hash -629377031, now seen corresponding path program 30 times [2020-11-12 03:03:07,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:07,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101101677] [2020-11-12 03:03:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:07,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101101677] [2020-11-12 03:03:07,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946847601] [2020-11-12 03:03:07,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:03:07,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 03:03:07,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:07,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:07,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:07,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:07,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:07,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:07,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:07,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902431516] [2020-11-12 03:03:07,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:07,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:07,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:07,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:07,819 INFO L87 Difference]: Start difference. First operand 3038 states and 4044 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:10,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:10,021 INFO L93 Difference]: Finished difference Result 7463 states and 9892 transitions. [2020-11-12 03:03:10,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-12 03:03:10,022 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:10,029 INFO L225 Difference]: With dead ends: 7463 [2020-11-12 03:03:10,029 INFO L226 Difference]: Without dead ends: 6729 [2020-11-12 03:03:10,029 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=913, Invalid=3247, Unknown=0, NotChecked=0, Total=4160 [2020-11-12 03:03:10,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6729 states. [2020-11-12 03:03:10,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6729 to 3047. [2020-11-12 03:03:10,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3047 states, 2959 states have (on average 1.3730990199391686) internal successors, (4063), 3046 states have internal predecessors, (4063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:10,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3047 states to 3047 states and 4063 transitions. [2020-11-12 03:03:10,077 INFO L78 Accepts]: Start accepts. Automaton has 3047 states and 4063 transitions. Word has length 58 [2020-11-12 03:03:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:10,077 INFO L481 AbstractCegarLoop]: Abstraction has 3047 states and 4063 transitions. [2020-11-12 03:03:10,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:10,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3047 states and 4063 transitions. [2020-11-12 03:03:10,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:10,081 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:10,081 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:10,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-11-12 03:03:10,282 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:10,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:10,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1481267475, now seen corresponding path program 31 times [2020-11-12 03:03:10,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:10,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392508668] [2020-11-12 03:03:10,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:10,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392508668] [2020-11-12 03:03:10,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495247688] [2020-11-12 03:03:10,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:03:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:10,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:10,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:10,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:10,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:10,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-12 03:03:10,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268130591] [2020-11-12 03:03:10,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 03:03:10,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:10,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 03:03:10,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-11-12 03:03:10,786 INFO L87 Difference]: Start difference. First operand 3047 states and 4063 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:11,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:11,655 INFO L93 Difference]: Finished difference Result 5377 states and 7049 transitions. [2020-11-12 03:03:11,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 03:03:11,656 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:11,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:11,661 INFO L225 Difference]: With dead ends: 5377 [2020-11-12 03:03:11,661 INFO L226 Difference]: Without dead ends: 5085 [2020-11-12 03:03:11,661 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=326, Invalid=1156, Unknown=0, NotChecked=0, Total=1482 [2020-11-12 03:03:11,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5085 states. [2020-11-12 03:03:11,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5085 to 3042. [2020-11-12 03:03:11,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3042 states, 2954 states have (on average 1.3716993906567367) internal successors, (4052), 3041 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:11,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3042 states to 3042 states and 4052 transitions. [2020-11-12 03:03:11,712 INFO L78 Accepts]: Start accepts. Automaton has 3042 states and 4052 transitions. Word has length 58 [2020-11-12 03:03:11,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:11,712 INFO L481 AbstractCegarLoop]: Abstraction has 3042 states and 4052 transitions. [2020-11-12 03:03:11,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:11,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3042 states and 4052 transitions. [2020-11-12 03:03:11,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:11,715 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:11,715 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:11,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:11,916 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:11,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:11,917 INFO L82 PathProgramCache]: Analyzing trace with hash -119120379, now seen corresponding path program 32 times [2020-11-12 03:03:11,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:11,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636237361] [2020-11-12 03:03:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:12,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636237361] [2020-11-12 03:03:12,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657259394] [2020-11-12 03:03:12,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:03:12,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:03:12,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:12,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:12,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:12,427 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:12,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:12,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:12,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:12,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:12,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:12,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509110654] [2020-11-12 03:03:12,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:12,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:12,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:12,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:12,575 INFO L87 Difference]: Start difference. First operand 3042 states and 4052 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:15,322 INFO L93 Difference]: Finished difference Result 7379 states and 9707 transitions. [2020-11-12 03:03:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-12 03:03:15,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:15,329 INFO L225 Difference]: With dead ends: 7379 [2020-11-12 03:03:15,329 INFO L226 Difference]: Without dead ends: 6715 [2020-11-12 03:03:15,330 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1076, Invalid=4180, Unknown=0, NotChecked=0, Total=5256 [2020-11-12 03:03:15,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6715 states. [2020-11-12 03:03:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6715 to 3057. [2020-11-12 03:03:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3057 states, 2969 states have (on average 1.3678006062647357) internal successors, (4061), 3056 states have internal predecessors, (4061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 4061 transitions. [2020-11-12 03:03:15,378 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 4061 transitions. Word has length 58 [2020-11-12 03:03:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:15,378 INFO L481 AbstractCegarLoop]: Abstraction has 3057 states and 4061 transitions. [2020-11-12 03:03:15,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 4061 transitions. [2020-11-12 03:03:15,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:15,382 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:15,382 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:15,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:15,595 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:15,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:15,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1660723240, now seen corresponding path program 33 times [2020-11-12 03:03:15,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:15,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338950858] [2020-11-12 03:03:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:15,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338950858] [2020-11-12 03:03:15,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637392140] [2020-11-12 03:03:15,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:03:15,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-12 03:03:15,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:15,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:15,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:16,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:16,290 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:16,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:16,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:16,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:16,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589967243] [2020-11-12 03:03:16,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:16,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:16,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:16,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:03:16,344 INFO L87 Difference]: Start difference. First operand 3057 states and 4061 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:17,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:17,323 INFO L93 Difference]: Finished difference Result 5117 states and 6617 transitions. [2020-11-12 03:03:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-12 03:03:17,324 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:03:17,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:17,329 INFO L225 Difference]: With dead ends: 5117 [2020-11-12 03:03:17,330 INFO L226 Difference]: Without dead ends: 4925 [2020-11-12 03:03:17,330 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=371, Invalid=1269, Unknown=0, NotChecked=0, Total=1640 [2020-11-12 03:03:17,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4925 states. [2020-11-12 03:03:17,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4925 to 3072. [2020-11-12 03:03:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3072 states, 2984 states have (on average 1.3679624664879357) internal successors, (4082), 3071 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3072 states to 3072 states and 4082 transitions. [2020-11-12 03:03:17,369 INFO L78 Accepts]: Start accepts. Automaton has 3072 states and 4082 transitions. Word has length 63 [2020-11-12 03:03:17,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:17,369 INFO L481 AbstractCegarLoop]: Abstraction has 3072 states and 4082 transitions. [2020-11-12 03:03:17,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:17,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3072 states and 4082 transitions. [2020-11-12 03:03:17,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:17,371 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:17,371 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:17,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-11-12 03:03:17,573 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:17,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:17,574 INFO L82 PathProgramCache]: Analyzing trace with hash -457503288, now seen corresponding path program 34 times [2020-11-12 03:03:17,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:17,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190397094] [2020-11-12 03:03:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:17,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190397094] [2020-11-12 03:03:17,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875121233] [2020-11-12 03:03:17,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:03:17,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:03:17,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:17,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:17,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:18,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:18,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:18,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:18,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:18,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:18,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:18,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972763138] [2020-11-12 03:03:18,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:18,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:18,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:18,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:03:18,287 INFO L87 Difference]: Start difference. First operand 3072 states and 4082 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:20,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:20,456 INFO L93 Difference]: Finished difference Result 5993 states and 7761 transitions. [2020-11-12 03:03:20,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-12 03:03:20,457 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:03:20,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:20,463 INFO L225 Difference]: With dead ends: 5993 [2020-11-12 03:03:20,463 INFO L226 Difference]: Without dead ends: 5647 [2020-11-12 03:03:20,464 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=767, Invalid=2773, Unknown=0, NotChecked=0, Total=3540 [2020-11-12 03:03:20,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5647 states. [2020-11-12 03:03:20,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5647 to 3197. [2020-11-12 03:03:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3109 states have (on average 1.3666773882277259) internal successors, (4249), 3196 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:20,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 4249 transitions. [2020-11-12 03:03:20,506 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 4249 transitions. Word has length 63 [2020-11-12 03:03:20,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:20,506 INFO L481 AbstractCegarLoop]: Abstraction has 3197 states and 4249 transitions. [2020-11-12 03:03:20,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:20,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 4249 transitions. [2020-11-12 03:03:20,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:20,509 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:20,509 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:20,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:20,710 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:20,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:20,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1287820186, now seen corresponding path program 35 times [2020-11-12 03:03:20,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:20,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018840478] [2020-11-12 03:03:20,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:20,980 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:20,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018840478] [2020-11-12 03:03:20,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399778161] [2020-11-12 03:03:20,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:03:21,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-12 03:03:21,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:21,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:21,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:21,431 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:21,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:21,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:21,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:21,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:21,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904273805] [2020-11-12 03:03:21,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:21,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:21,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:21,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:03:21,492 INFO L87 Difference]: Start difference. First operand 3197 states and 4249 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:22,727 INFO L93 Difference]: Finished difference Result 5342 states and 6866 transitions. [2020-11-12 03:03:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-12 03:03:22,728 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:03:22,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:22,733 INFO L225 Difference]: With dead ends: 5342 [2020-11-12 03:03:22,733 INFO L226 Difference]: Without dead ends: 5209 [2020-11-12 03:03:22,733 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=441, Invalid=1451, Unknown=0, NotChecked=0, Total=1892 [2020-11-12 03:03:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5209 states. [2020-11-12 03:03:22,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5209 to 3207. [2020-11-12 03:03:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3119 states have (on average 1.3693491503687079) internal successors, (4271), 3206 states have internal predecessors, (4271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:22,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4271 transitions. [2020-11-12 03:03:22,778 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 4271 transitions. Word has length 63 [2020-11-12 03:03:22,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:22,778 INFO L481 AbstractCegarLoop]: Abstraction has 3207 states and 4271 transitions. [2020-11-12 03:03:22,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:22,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 4271 transitions. [2020-11-12 03:03:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:22,781 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:22,782 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:22,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-12 03:03:22,994 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:22,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:22,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1578009826, now seen corresponding path program 36 times [2020-11-12 03:03:22,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:22,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244037168] [2020-11-12 03:03:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:23,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244037168] [2020-11-12 03:03:23,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682367954] [2020-11-12 03:03:23,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:03:23,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 03:03:23,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:23,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:23,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:23,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:23,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:23,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:23,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:23,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:23,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:23,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919296324] [2020-11-12 03:03:23,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:23,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:23,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:23,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:03:23,828 INFO L87 Difference]: Start difference. First operand 3207 states and 4271 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:27,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:27,069 INFO L93 Difference]: Finished difference Result 7082 states and 9296 transitions. [2020-11-12 03:03:27,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-11-12 03:03:27,071 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:03:27,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:27,077 INFO L225 Difference]: With dead ends: 7082 [2020-11-12 03:03:27,077 INFO L226 Difference]: Without dead ends: 6492 [2020-11-12 03:03:27,077 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1116, Invalid=3996, Unknown=0, NotChecked=0, Total=5112 [2020-11-12 03:03:27,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6492 states. [2020-11-12 03:03:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6492 to 3257. [2020-11-12 03:03:27,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 3169 states have (on average 1.3673082991479961) internal successors, (4333), 3256 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 4333 transitions. [2020-11-12 03:03:27,137 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 4333 transitions. Word has length 63 [2020-11-12 03:03:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:27,137 INFO L481 AbstractCegarLoop]: Abstraction has 3257 states and 4333 transitions. [2020-11-12 03:03:27,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:27,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 4333 transitions. [2020-11-12 03:03:27,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:27,140 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:27,140 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:27,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-12 03:03:27,340 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:27,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1048630570, now seen corresponding path program 37 times [2020-11-12 03:03:27,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:27,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693999323] [2020-11-12 03:03:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:27,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693999323] [2020-11-12 03:03:27,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585547933] [2020-11-12 03:03:27,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:03:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:27,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:27,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:29,318 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:29,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:29,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:29,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:29,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145753760] [2020-11-12 03:03:29,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:29,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:29,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:29,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=403, Unknown=2, NotChecked=0, Total=506 [2020-11-12 03:03:29,354 INFO L87 Difference]: Start difference. First operand 3257 states and 4333 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:40,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:40,053 INFO L93 Difference]: Finished difference Result 5709 states and 7307 transitions. [2020-11-12 03:03:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-12 03:03:40,054 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:03:40,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:40,059 INFO L225 Difference]: With dead ends: 5709 [2020-11-12 03:03:40,059 INFO L226 Difference]: Without dead ends: 5576 [2020-11-12 03:03:40,060 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=566, Invalid=2084, Unknown=2, NotChecked=0, Total=2652 [2020-11-12 03:03:40,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2020-11-12 03:03:40,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 3253. [2020-11-12 03:03:40,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3253 states, 3165 states have (on average 1.3665086887835702) internal successors, (4325), 3252 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3253 states to 3253 states and 4325 transitions. [2020-11-12 03:03:40,123 INFO L78 Accepts]: Start accepts. Automaton has 3253 states and 4325 transitions. Word has length 63 [2020-11-12 03:03:40,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:40,123 INFO L481 AbstractCegarLoop]: Abstraction has 3253 states and 4325 transitions. [2020-11-12 03:03:40,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3253 states and 4325 transitions. [2020-11-12 03:03:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:40,126 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:40,126 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:40,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-12 03:03:40,327 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:40,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:40,328 INFO L82 PathProgramCache]: Analyzing trace with hash -912754002, now seen corresponding path program 38 times [2020-11-12 03:03:40,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:40,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760918576] [2020-11-12 03:03:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:40,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760918576] [2020-11-12 03:03:40,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141771619] [2020-11-12 03:03:40,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:03:40,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:03:40,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:40,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:40,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:43,113 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:43,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:43,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:43,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:43,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:43,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315120361] [2020-11-12 03:03:43,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:43,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:43,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:43,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=384, Unknown=1, NotChecked=0, Total=506 [2020-11-12 03:03:43,385 INFO L87 Difference]: Start difference. First operand 3253 states and 4325 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:47,847 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-12 03:03:50,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:50,834 INFO L93 Difference]: Finished difference Result 6479 states and 8251 transitions. [2020-11-12 03:03:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-12 03:03:50,835 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:03:50,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:50,840 INFO L225 Difference]: With dead ends: 6479 [2020-11-12 03:03:50,841 INFO L226 Difference]: Without dead ends: 6269 [2020-11-12 03:03:50,841 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=998, Invalid=3423, Unknown=1, NotChecked=0, Total=4422 [2020-11-12 03:03:50,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6269 states. [2020-11-12 03:03:50,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6269 to 3272. [2020-11-12 03:03:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 3184 states have (on average 1.36714824120603) internal successors, (4353), 3271 states have internal predecessors, (4353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 4353 transitions. [2020-11-12 03:03:50,891 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 4353 transitions. Word has length 63 [2020-11-12 03:03:50,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:50,892 INFO L481 AbstractCegarLoop]: Abstraction has 3272 states and 4353 transitions. [2020-11-12 03:03:50,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:50,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 4353 transitions. [2020-11-12 03:03:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:50,894 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:50,894 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:51,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-12 03:03:51,095 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:51,096 INFO L82 PathProgramCache]: Analyzing trace with hash 428580378, now seen corresponding path program 39 times [2020-11-12 03:03:51,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:51,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624589963] [2020-11-12 03:03:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:51,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624589963] [2020-11-12 03:03:51,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442153498] [2020-11-12 03:03:51,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:03:51,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 03:03:51,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:51,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:51,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:51,936 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:51,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:51,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:51,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:51,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:51,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:51,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:51,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:52,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:52,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:52,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128204564] [2020-11-12 03:03:52,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:52,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:52,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:52,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:03:52,043 INFO L87 Difference]: Start difference. First operand 3272 states and 4353 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:54,079 INFO L93 Difference]: Finished difference Result 6306 states and 8187 transitions. [2020-11-12 03:03:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-12 03:03:54,081 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:03:54,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:54,087 INFO L225 Difference]: With dead ends: 6306 [2020-11-12 03:03:54,087 INFO L226 Difference]: Without dead ends: 6014 [2020-11-12 03:03:54,087 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=519, Invalid=1643, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 03:03:54,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6014 states. [2020-11-12 03:03:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6014 to 3347. [2020-11-12 03:03:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3347 states, 3259 states have (on average 1.3642221540349802) internal successors, (4446), 3346 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:54,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3347 states to 3347 states and 4446 transitions. [2020-11-12 03:03:54,132 INFO L78 Accepts]: Start accepts. Automaton has 3347 states and 4446 transitions. Word has length 63 [2020-11-12 03:03:54,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:54,133 INFO L481 AbstractCegarLoop]: Abstraction has 3347 states and 4446 transitions. [2020-11-12 03:03:54,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:54,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3347 states and 4446 transitions. [2020-11-12 03:03:54,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:54,135 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:54,135 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:54,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-12 03:03:54,339 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:54,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:54,340 INFO L82 PathProgramCache]: Analyzing trace with hash -286191092, now seen corresponding path program 40 times [2020-11-12 03:03:54,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:54,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906707596] [2020-11-12 03:03:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:54,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906707596] [2020-11-12 03:03:54,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93008564] [2020-11-12 03:03:54,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:03:54,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:03:54,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:54,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:54,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:55,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:55,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:55,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:55,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:55,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:55,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467915832] [2020-11-12 03:03:55,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:55,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:55,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:55,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:03:55,270 INFO L87 Difference]: Start difference. First operand 3347 states and 4446 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:57,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:57,169 INFO L93 Difference]: Finished difference Result 6091 states and 7930 transitions. [2020-11-12 03:03:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-12 03:03:57,170 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:03:57,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:57,176 INFO L225 Difference]: With dead ends: 6091 [2020-11-12 03:03:57,176 INFO L226 Difference]: Without dead ends: 5799 [2020-11-12 03:03:57,176 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 03:03:57,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5799 states. [2020-11-12 03:03:57,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5799 to 3382. [2020-11-12 03:03:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3382 states, 3294 states have (on average 1.3658166363084396) internal successors, (4499), 3381 states have internal predecessors, (4499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 4499 transitions. [2020-11-12 03:03:57,219 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 4499 transitions. Word has length 63 [2020-11-12 03:03:57,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:57,220 INFO L481 AbstractCegarLoop]: Abstraction has 3382 states and 4499 transitions. [2020-11-12 03:03:57,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:57,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 4499 transitions. [2020-11-12 03:03:57,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:57,223 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:57,223 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:57,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:57,423 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:57,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:57,424 INFO L82 PathProgramCache]: Analyzing trace with hash -39096824, now seen corresponding path program 41 times [2020-11-12 03:03:57,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:57,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979281396] [2020-11-12 03:03:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:57,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979281396] [2020-11-12 03:03:57,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324830247] [2020-11-12 03:03:57,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:03:57,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 03:03:57,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:57,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:57,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:58,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:58,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:58,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:58,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:58,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:58,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:58,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869966423] [2020-11-12 03:03:58,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:58,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:58,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:58,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:03:58,327 INFO L87 Difference]: Start difference. First operand 3382 states and 4499 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:04:02,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:04:02,761 INFO L93 Difference]: Finished difference Result 7589 states and 10040 transitions. [2020-11-12 03:04:02,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-12 03:04:02,763 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:04:02,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:04:02,769 INFO L225 Difference]: With dead ends: 7589 [2020-11-12 03:04:02,769 INFO L226 Difference]: Without dead ends: 6856 [2020-11-12 03:04:02,770 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1267, Invalid=4585, Unknown=0, NotChecked=0, Total=5852 [2020-11-12 03:04:02,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6856 states. [2020-11-12 03:04:02,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6856 to 3437. [2020-11-12 03:04:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3437 states, 3349 states have (on average 1.3651836369065393) internal successors, (4572), 3436 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:04:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 4572 transitions. [2020-11-12 03:04:02,818 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 4572 transitions. Word has length 63 [2020-11-12 03:04:02,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:04:02,818 INFO L481 AbstractCegarLoop]: Abstraction has 3437 states and 4572 transitions. [2020-11-12 03:04:02,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:04:02,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 4572 transitions. [2020-11-12 03:04:02,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:04:02,822 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:04:02,822 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:04:03,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:04:03,023 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:04:03,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:04:03,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1395803976, now seen corresponding path program 42 times [2020-11-12 03:04:03,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:04:03,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2617921] [2020-11-12 03:04:03,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:04:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:04:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:04:03,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2617921] [2020-11-12 03:04:03,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708207888] [2020-11-12 03:04:03,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:04:03,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 03:04:03,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:04:03,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:04:03,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:04:03,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:04:04,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:04:04,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:04:04,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:04:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:04:04,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:04:04,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:04:04,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224448495] [2020-11-12 03:04:04,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:04:04,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:04:04,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:04:04,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:04:04,302 INFO L87 Difference]: Start difference. First operand 3437 states and 4572 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:04:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:04:10,467 INFO L93 Difference]: Finished difference Result 8103 states and 10614 transitions. [2020-11-12 03:04:10,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-12 03:04:10,469 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:04:10,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:04:10,475 INFO L225 Difference]: With dead ends: 8103 [2020-11-12 03:04:10,475 INFO L226 Difference]: Without dead ends: 7425 [2020-11-12 03:04:10,476 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1434, Invalid=5208, Unknown=0, NotChecked=0, Total=6642 [2020-11-12 03:04:10,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7425 states. [2020-11-12 03:04:10,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7425 to 3472. [2020-11-12 03:04:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 3384 states have (on average 1.366725768321513) internal successors, (4625), 3471 states have internal predecessors, (4625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:04:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 4625 transitions. [2020-11-12 03:04:10,527 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 4625 transitions. Word has length 63 [2020-11-12 03:04:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:04:10,527 INFO L481 AbstractCegarLoop]: Abstraction has 3472 states and 4625 transitions. [2020-11-12 03:04:10,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:04:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 4625 transitions. [2020-11-12 03:04:10,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:04:10,530 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:04:10,530 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:04:10,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-11-12 03:04:10,732 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:04:10,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:04:10,733 INFO L82 PathProgramCache]: Analyzing trace with hash 576848318, now seen corresponding path program 43 times [2020-11-12 03:04:10,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:04:10,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084437748] [2020-11-12 03:04:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:04:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:04:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:04:11,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084437748] [2020-11-12 03:04:11,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753051480] [2020-11-12 03:04:11,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:04:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:04:11,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:04:11,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:04:11,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:04:11,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:04:11,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:04:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:04:11,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:04:11,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:04:11,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102002948] [2020-11-12 03:04:11,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:04:11,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:04:11,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:04:11,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:04:11,670 INFO L87 Difference]: Start difference. First operand 3472 states and 4625 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:04:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:04:14,669 INFO L93 Difference]: Finished difference Result 6784 states and 8781 transitions. [2020-11-12 03:04:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-12 03:04:14,670 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:04:14,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:04:14,677 INFO L225 Difference]: With dead ends: 6784 [2020-11-12 03:04:14,677 INFO L226 Difference]: Without dead ends: 6492 [2020-11-12 03:04:14,677 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=781, Invalid=2759, Unknown=0, NotChecked=0, Total=3540 [2020-11-12 03:04:14,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6492 states. [2020-11-12 03:04:14,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6492 to 3462. [2020-11-12 03:04:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3462 states, 3374 states have (on average 1.3618850029638412) internal successors, (4595), 3461 states have internal predecessors, (4595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:04:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 4595 transitions. [2020-11-12 03:04:14,725 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 4595 transitions. Word has length 63 [2020-11-12 03:04:14,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:04:14,726 INFO L481 AbstractCegarLoop]: Abstraction has 3462 states and 4595 transitions. [2020-11-12 03:04:14,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:04:14,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 4595 transitions. [2020-11-12 03:04:14,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:04:14,729 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:04:14,729 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:04:14,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:04:14,930 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:04:14,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:04:14,931 INFO L82 PathProgramCache]: Analyzing trace with hash 712724886, now seen corresponding path program 44 times [2020-11-12 03:04:14,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:04:14,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025251819] [2020-11-12 03:04:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:04:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:04:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:04:15,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025251819] [2020-11-12 03:04:15,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170469066] [2020-11-12 03:04:15,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:04:15,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:04:15,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:04:15,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:04:15,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:04:15,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:04:17,956 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:04:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:04:17,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:04:17,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:04:17,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590409552] [2020-11-12 03:04:17,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:04:17,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:04:17,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:04:17,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=386, Unknown=1, NotChecked=0, Total=506 [2020-11-12 03:04:17,974 INFO L87 Difference]: Start difference. First operand 3462 states and 4595 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:04:22,697 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-11-12 03:04:27,355 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-12 03:04:29,474 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 34 [2020-11-12 03:04:46,085 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-11-12 03:04:50,319 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-11-12 03:05:42,079 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-11-12 03:06:00,692 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-11-12 03:06:08,974 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 34 [2020-11-12 03:06:35,806 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 33 [2020-11-12 03:06:40,082 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-11-12 03:08:25,322 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-11-12 03:09:08,807 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-11-12 03:09:15,030 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2020-11-12 03:11:15,222 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-11-12 03:12:01,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:12:01,421 INFO L93 Difference]: Finished difference Result 8401 states and 10926 transitions. [2020-11-12 03:12:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-11-12 03:12:01,423 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:12:01,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:12:01,429 INFO L225 Difference]: With dead ends: 8401 [2020-11-12 03:12:01,429 INFO L226 Difference]: Without dead ends: 7811 [2020-11-12 03:12:01,430 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 149.7s TimeCoverageRelationStatistics Valid=1511, Invalid=5587, Unknown=42, NotChecked=0, Total=7140 [2020-11-12 03:12:01,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7811 states. [2020-11-12 03:12:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7811 to 3492. [2020-11-12 03:12:01,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3404 states have (on average 1.3645710928319623) internal successors, (4645), 3491 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:01,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 4645 transitions. [2020-11-12 03:12:01,479 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 4645 transitions. Word has length 63 [2020-11-12 03:12:01,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:12:01,479 INFO L481 AbstractCegarLoop]: Abstraction has 3492 states and 4645 transitions. [2020-11-12 03:12:01,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:01,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 4645 transitions. [2020-11-12 03:12:01,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:12:01,483 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:12:01,483 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:12:01,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-11-12 03:12:01,691 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:12:01,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:12:01,692 INFO L82 PathProgramCache]: Analyzing trace with hash 862344050, now seen corresponding path program 45 times [2020-11-12 03:12:01,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:12:01,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002545678] [2020-11-12 03:12:01,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:12:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:12:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:02,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002545678] [2020-11-12 03:12:02,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218249878] [2020-11-12 03:12:02,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:12:02,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-12 03:12:02,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:12:02,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:12:02,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:12:02,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:02,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:12:02,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:12:02,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061100220] [2020-11-12 03:12:02,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:12:02,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:12:02,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:12:02,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:12:02,883 INFO L87 Difference]: Start difference. First operand 3492 states and 4645 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:05,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:12:05,744 INFO L93 Difference]: Finished difference Result 6642 states and 8659 transitions. [2020-11-12 03:12:05,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-12 03:12:05,746 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:12:05,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:12:05,752 INFO L225 Difference]: With dead ends: 6642 [2020-11-12 03:12:05,753 INFO L226 Difference]: Without dead ends: 6300 [2020-11-12 03:12:05,753 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=596, Invalid=1756, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 03:12:05,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2020-11-12 03:12:05,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 3566. [2020-11-12 03:12:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3566 states, 3478 states have (on average 1.361414606095457) internal successors, (4735), 3565 states have internal predecessors, (4735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 4735 transitions. [2020-11-12 03:12:05,818 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 4735 transitions. Word has length 63 [2020-11-12 03:12:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:12:05,818 INFO L481 AbstractCegarLoop]: Abstraction has 3566 states and 4735 transitions. [2020-11-12 03:12:05,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:05,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 4735 transitions. [2020-11-12 03:12:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:12:05,821 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:12:05,822 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:12:06,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:12:06,037 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:12:06,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:12:06,037 INFO L82 PathProgramCache]: Analyzing trace with hash 147572580, now seen corresponding path program 46 times [2020-11-12 03:12:06,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:12:06,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990607216] [2020-11-12 03:12:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:12:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:12:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:06,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990607216] [2020-11-12 03:12:06,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737057314] [2020-11-12 03:12:06,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:12:06,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:12:06,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:12:06,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:12:06,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:12:07,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:07,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:07,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:07,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:12:07,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:12:07,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649101119] [2020-11-12 03:12:07,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:12:07,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:12:07,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:12:07,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:12:07,287 INFO L87 Difference]: Start difference. First operand 3566 states and 4735 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:12:10,534 INFO L93 Difference]: Finished difference Result 6774 states and 8783 transitions. [2020-11-12 03:12:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-12 03:12:10,536 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:12:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:12:10,542 INFO L225 Difference]: With dead ends: 6774 [2020-11-12 03:12:10,542 INFO L226 Difference]: Without dead ends: 6482 [2020-11-12 03:12:10,543 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=675, Invalid=1977, Unknown=0, NotChecked=0, Total=2652 [2020-11-12 03:12:10,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6482 states. [2020-11-12 03:12:10,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6482 to 3651. [2020-11-12 03:12:10,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3651 states, 3563 states have (on average 1.3612124614089252) internal successors, (4850), 3650 states have internal predecessors, (4850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 4850 transitions. [2020-11-12 03:12:10,615 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 4850 transitions. Word has length 63 [2020-11-12 03:12:10,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:12:10,615 INFO L481 AbstractCegarLoop]: Abstraction has 3651 states and 4850 transitions. [2020-11-12 03:12:10,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:10,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 4850 transitions. [2020-11-12 03:12:10,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:12:10,618 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:12:10,618 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:12:10,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-11-12 03:12:10,823 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:12:10,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:12:10,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1232378876, now seen corresponding path program 47 times [2020-11-12 03:12:10,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:12:10,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708948570] [2020-11-12 03:12:10,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:12:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:12:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:11,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708948570] [2020-11-12 03:12:11,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326848760] [2020-11-12 03:12:11,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:12:11,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 03:12:11,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:12:11,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:12:11,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:12:11,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:11,963 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:11,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:11,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:11,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:11,979 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:11,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:11,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:12,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:12:12,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:12:12,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243589136] [2020-11-12 03:12:12,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:12:12,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:12:12,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:12:12,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:12:12,147 INFO L87 Difference]: Start difference. First operand 3651 states and 4850 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:15,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:12:15,430 INFO L93 Difference]: Finished difference Result 6769 states and 8780 transitions. [2020-11-12 03:12:15,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-12 03:12:15,433 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:12:15,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:12:15,439 INFO L225 Difference]: With dead ends: 6769 [2020-11-12 03:12:15,439 INFO L226 Difference]: Without dead ends: 6477 [2020-11-12 03:12:15,439 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=641, Invalid=1909, Unknown=0, NotChecked=0, Total=2550 [2020-11-12 03:12:15,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6477 states. [2020-11-12 03:12:15,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6477 to 3681. [2020-11-12 03:12:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3681 states, 3593 states have (on average 1.3615363206234345) internal successors, (4892), 3680 states have internal predecessors, (4892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 4892 transitions. [2020-11-12 03:12:15,515 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 4892 transitions. Word has length 63 [2020-11-12 03:12:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:12:15,516 INFO L481 AbstractCegarLoop]: Abstraction has 3681 states and 4892 transitions. [2020-11-12 03:12:15,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 4892 transitions. [2020-11-12 03:12:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:12:15,519 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:12:15,519 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:12:15,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:12:15,720 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:12:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:12:15,721 INFO L82 PathProgramCache]: Analyzing trace with hash 132112946, now seen corresponding path program 48 times [2020-11-12 03:12:15,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:12:15,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702858038] [2020-11-12 03:12:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:12:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:12:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:16,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702858038] [2020-11-12 03:12:16,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120719075] [2020-11-12 03:12:16,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:12:16,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-12 03:12:16,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:12:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:12:16,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:12:16,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:16,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:12:16,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:12:16,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640731131] [2020-11-12 03:12:16,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:12:16,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:12:16,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:12:16,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:12:16,756 INFO L87 Difference]: Start difference. First operand 3681 states and 4892 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:19,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:12:19,676 INFO L93 Difference]: Finished difference Result 6781 states and 8844 transitions. [2020-11-12 03:12:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-12 03:12:19,678 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:12:19,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:12:19,685 INFO L225 Difference]: With dead ends: 6781 [2020-11-12 03:12:19,685 INFO L226 Difference]: Without dead ends: 6439 [2020-11-12 03:12:19,686 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=754, Invalid=2326, Unknown=0, NotChecked=0, Total=3080 [2020-11-12 03:12:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6439 states. [2020-11-12 03:12:19,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6439 to 3651. [2020-11-12 03:12:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3651 states, 3563 states have (on average 1.3612124614089252) internal successors, (4850), 3650 states have internal predecessors, (4850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 4850 transitions. [2020-11-12 03:12:19,737 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 4850 transitions. Word has length 63 [2020-11-12 03:12:19,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:12:19,737 INFO L481 AbstractCegarLoop]: Abstraction has 3651 states and 4850 transitions. [2020-11-12 03:12:19,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:19,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 4850 transitions. [2020-11-12 03:12:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:12:19,742 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:12:19,742 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:12:19,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-11-12 03:12:19,958 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:12:19,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:12:19,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1118911398, now seen corresponding path program 49 times [2020-11-12 03:12:19,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:12:19,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173246797] [2020-11-12 03:12:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:12:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:12:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:20,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173246797] [2020-11-12 03:12:20,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660494059] [2020-11-12 03:12:20,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:12:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:12:20,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:12:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:12:20,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:21,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:12:21,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:12:21,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659019176] [2020-11-12 03:12:21,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:12:21,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:12:21,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:12:21,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:12:21,036 INFO L87 Difference]: Start difference. First operand 3651 states and 4850 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:23,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:12:23,266 INFO L93 Difference]: Finished difference Result 6097 states and 7876 transitions. [2020-11-12 03:12:23,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-12 03:12:23,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:12:23,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:12:23,275 INFO L225 Difference]: With dead ends: 6097 [2020-11-12 03:12:23,275 INFO L226 Difference]: Without dead ends: 5905 [2020-11-12 03:12:23,275 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=551, Invalid=1705, Unknown=0, NotChecked=0, Total=2256 [2020-11-12 03:12:23,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5905 states. [2020-11-12 03:12:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5905 to 3656. [2020-11-12 03:12:23,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3568 states have (on average 1.3623878923766817) internal successors, (4861), 3655 states have internal predecessors, (4861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 4861 transitions. [2020-11-12 03:12:23,322 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 4861 transitions. Word has length 63 [2020-11-12 03:12:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:12:23,322 INFO L481 AbstractCegarLoop]: Abstraction has 3656 states and 4861 transitions. [2020-11-12 03:12:23,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 4861 transitions. [2020-11-12 03:12:23,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:12:23,325 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:12:23,325 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:12:23,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-12 03:12:23,529 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:12:23,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:12:23,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1718596446, now seen corresponding path program 50 times [2020-11-12 03:12:23,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:12:23,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701113155] [2020-11-12 03:12:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:12:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:12:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:23,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701113155] [2020-11-12 03:12:23,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760472341] [2020-11-12 03:12:23,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:12:24,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:12:24,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:12:24,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:12:24,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:12:24,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:24,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:24,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:12:24,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:12:24,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061320263] [2020-11-12 03:12:24,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:12:24,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:12:24,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:12:24,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:12:24,610 INFO L87 Difference]: Start difference. First operand 3656 states and 4861 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:12:31,475 INFO L93 Difference]: Finished difference Result 8278 states and 11127 transitions. [2020-11-12 03:12:31,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-11-12 03:12:31,477 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:12:31,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:12:31,484 INFO L225 Difference]: With dead ends: 8278 [2020-11-12 03:12:31,484 INFO L226 Difference]: Without dead ends: 7287 [2020-11-12 03:12:31,485 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2495 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1636, Invalid=5846, Unknown=0, NotChecked=0, Total=7482 [2020-11-12 03:12:31,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7287 states. [2020-11-12 03:12:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7287 to 3796. [2020-11-12 03:12:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3708 states have (on average 1.3576051779935274) internal successors, (5034), 3795 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:31,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 5034 transitions. [2020-11-12 03:12:31,540 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 5034 transitions. Word has length 63 [2020-11-12 03:12:31,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:12:31,541 INFO L481 AbstractCegarLoop]: Abstraction has 3796 states and 5034 transitions. [2020-11-12 03:12:31,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:31,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 5034 transitions. [2020-11-12 03:12:31,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:12:31,544 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:12:31,544 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:12:31,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:12:31,746 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:12:31,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:12:31,747 INFO L82 PathProgramCache]: Analyzing trace with hash -283695646, now seen corresponding path program 51 times [2020-11-12 03:12:31,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:12:31,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358652739] [2020-11-12 03:12:31,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:12:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:12:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:32,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358652739] [2020-11-12 03:12:32,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104583145] [2020-11-12 03:12:32,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 03:12:32,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-12 03:12:32,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:12:32,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:12:32,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:12:32,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:12:32,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:12:32,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:12:33,020 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:12:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:12:33,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:12:33,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:12:33,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137039894] [2020-11-12 03:12:33,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:12:33,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:12:33,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:12:33,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:12:33,185 INFO L87 Difference]: Start difference. First operand 3796 states and 5034 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:12:34,227 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 24 [2020-11-12 03:12:39,671 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-11-12 03:12:40,792 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 23 [2020-11-12 03:12:42,922 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 45 [2020-11-12 03:12:58,357 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 52 [2020-11-12 03:13:00,651 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 46 [2020-11-12 03:13:06,175 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-11-12 03:13:34,763 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 42 [2020-11-12 03:14:54,861 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 49 [2020-11-12 03:15:15,424 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-11-12 03:15:44,227 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 54 DAG size of output: 52 Received shutdown request... [2020-11-12 03:15:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-12 03:15:56,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:15:56,658 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-12 03:15:56,664 WARN L250 ceAbstractionStarter]: Timeout [2020-11-12 03:15:56,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 03:15:56 BasicIcfg [2020-11-12 03:15:56,664 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-12 03:15:56,665 INFO L168 Benchmark]: Toolchain (without parser) took 851685.36 ms. Allocated memory was 310.4 MB in the beginning and 587.2 MB in the end (delta: 276.8 MB). Free memory was 284.9 MB in the beginning and 301.7 MB in the end (delta: -16.8 MB). Peak memory consumption was 261.4 MB. Max. memory is 16.0 GB. [2020-11-12 03:15:56,665 INFO L168 Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 310.4 MB. Free memory is still 280.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-12 03:15:56,665 INFO L168 Benchmark]: CACSL2BoogieTranslator took 692.30 ms. Allocated memory is still 310.4 MB. Free memory was 284.2 MB in the beginning and 284.7 MB in the end (delta: -480.3 kB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. [2020-11-12 03:15:56,666 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.16 ms. Allocated memory is still 310.4 MB. Free memory was 284.7 MB in the beginning and 282.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-12 03:15:56,666 INFO L168 Benchmark]: Boogie Preprocessor took 29.13 ms. Allocated memory is still 310.4 MB. Free memory was 282.7 MB in the beginning and 281.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-12 03:15:56,666 INFO L168 Benchmark]: RCFGBuilder took 529.77 ms. Allocated memory is still 310.4 MB. Free memory was 281.6 MB in the beginning and 261.3 MB in the end (delta: 20.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2020-11-12 03:15:56,667 INFO L168 Benchmark]: TraceAbstraction took 850349.21 ms. Allocated memory was 310.4 MB in the beginning and 587.2 MB in the end (delta: 276.8 MB). Free memory was 261.0 MB in the beginning and 301.7 MB in the end (delta: -40.6 MB). Peak memory consumption was 238.8 MB. Max. memory is 16.0 GB. [2020-11-12 03:15:56,668 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68 ms. Allocated memory is still 310.4 MB. Free memory is still 280.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 692.30 ms. Allocated memory is still 310.4 MB. Free memory was 284.2 MB in the beginning and 284.7 MB in the end (delta: -480.3 kB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 67.16 ms. Allocated memory is still 310.4 MB. Free memory was 284.7 MB in the beginning and 282.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 29.13 ms. Allocated memory is still 310.4 MB. Free memory was 282.7 MB in the beginning and 281.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 529.77 ms. Allocated memory is still 310.4 MB. Free memory was 281.6 MB in the beginning and 261.3 MB in the end (delta: 20.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 850349.21 ms. Allocated memory was 310.4 MB in the beginning and 587.2 MB in the end (delta: 276.8 MB). Free memory was 261.0 MB in the beginning and 301.7 MB in the end (delta: -40.6 MB). Peak memory consumption was 238.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (3796states) and FLOYD_HOARE automaton (currently 56 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 68 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 850.2s, OverallIterations: 72, TraceHistogramMax: 6, AutomataDifference: 782.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.3s, HoareTripleCheckerStatistics: 5746 SDtfs, 50245 SDslu, 66656 SDs, 0 SdLazy, 12052 SolverSat, 4897 SolverUnsat, 210 SolverUnknown, 0 SolverNotchecked, 434.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6309 GetRequests, 3276 SyntacticMatches, 31 SemanticMatches, 3001 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47715 ImplicationChecksByTransitivity, 357.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3796occurred in iteration=71, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.3s AutomataMinimizationTime, 71 MinimizatonAttempts, 125814 StatesRemovedByMinimization, 71 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 42.7s InterpolantComputationTime, 7662 NumberOfCodeBlocks, 7662 NumberOfCodeBlocksAsserted, 247 NumberOfCheckSat, 7523 ConstructedInterpolants, 9 QuantifiedInterpolants, 3408736 SizeOfPredicates, 279 NumberOfNonLiveVariables, 9144 ConjunctsInSsa, 862 ConjunctsInUnsatCore, 139 InterpolantComputations, 6 PerfectInterpolantSequences, 103/2946 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