/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.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-6f57305 [2021-01-26 14:17:11,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-26 14:17:11,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-26 14:17:11,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-26 14:17:11,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-26 14:17:11,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-26 14:17:11,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-26 14:17:11,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-26 14:17:11,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-26 14:17:11,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-26 14:17:11,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-26 14:17:11,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-26 14:17:11,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-26 14:17:11,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-26 14:17:11,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-26 14:17:11,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-26 14:17:11,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-26 14:17:11,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-26 14:17:11,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-26 14:17:11,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-26 14:17:11,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-26 14:17:11,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-26 14:17:11,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-26 14:17:11,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-26 14:17:11,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-26 14:17:11,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-26 14:17:11,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-26 14:17:11,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-26 14:17:11,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-26 14:17:11,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-26 14:17:11,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-26 14:17:11,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-26 14:17:11,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-26 14:17:11,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-26 14:17:11,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-26 14:17:11,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-26 14:17:11,200 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.epf [2021-01-26 14:17:11,255 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-26 14:17:11,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-26 14:17:11,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-26 14:17:11,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-26 14:17:11,258 INFO L138 SettingsManager]: * Use SBE=true [2021-01-26 14:17:11,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-26 14:17:11,258 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-26 14:17:11,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-26 14:17:11,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-26 14:17:11,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-26 14:17:11,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-26 14:17:11,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-26 14:17:11,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-26 14:17:11,260 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-26 14:17:11,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-26 14:17:11,260 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-26 14:17:11,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-26 14:17:11,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-26 14:17:11,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-26 14:17:11,261 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-26 14:17:11,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-26 14:17:11,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-26 14:17:11,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-26 14:17:11,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-26 14:17:11,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-26 14:17:11,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-26 14:17:11,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-26 14:17:11,263 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-26 14:17:11,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-26 14:17:11,263 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-26 14:17:11,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-26 14:17:11,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-26 14:17:11,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-26 14:17:11,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-26 14:17:11,722 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-26 14:17:11,723 INFO L275 PluginConnector]: CDTParser initialized [2021-01-26 14:17:11,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2021-01-26 14:17:11,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f7025835/9f3e665be4e74ece993d68da0cb5cd52/FLAGeb7f2a5c2 [2021-01-26 14:17:12,545 INFO L306 CDTParser]: Found 1 translation units. [2021-01-26 14:17:12,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2021-01-26 14:17:12,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f7025835/9f3e665be4e74ece993d68da0cb5cd52/FLAGeb7f2a5c2 [2021-01-26 14:17:12,737 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f7025835/9f3e665be4e74ece993d68da0cb5cd52 [2021-01-26 14:17:12,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-26 14:17:12,753 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-26 14:17:12,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-26 14:17:12,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-26 14:17:12,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-26 14:17:12,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.01 02:17:12" (1/1) ... [2021-01-26 14:17:12,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@667cf232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:12, skipping insertion in model container [2021-01-26 14:17:12,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.01 02:17:12" (1/1) ... [2021-01-26 14:17:12,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-26 14:17:12,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-26 14:17:13,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-26 14:17:13,334 INFO L203 MainTranslator]: Completed pre-run [2021-01-26 14:17:13,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-26 14:17:13,515 INFO L208 MainTranslator]: Completed translation [2021-01-26 14:17:13,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:13 WrapperNode [2021-01-26 14:17:13,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-26 14:17:13,517 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-26 14:17:13,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-26 14:17:13,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-26 14:17:13,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:13" (1/1) ... [2021-01-26 14:17:13,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:13" (1/1) ... [2021-01-26 14:17:13,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-26 14:17:13,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-26 14:17:13,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-26 14:17:13,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-26 14:17:13,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:13" (1/1) ... [2021-01-26 14:17:13,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:13" (1/1) ... [2021-01-26 14:17:13,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:13" (1/1) ... [2021-01-26 14:17:13,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:13" (1/1) ... [2021-01-26 14:17:13,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:13" (1/1) ... [2021-01-26 14:17:13,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:13" (1/1) ... [2021-01-26 14:17:13,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:13" (1/1) ... [2021-01-26 14:17:13,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-26 14:17:13,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-26 14:17:13,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-26 14:17:13,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-26 14:17:13,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:13" (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 [2021-01-26 14:17:13,676 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-26 14:17:13,676 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-26 14:17:13,677 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-26 14:17:13,677 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-26 14:17:13,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-26 14:17:13,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-26 14:17:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-26 14:17:13,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-26 14:17:13,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-26 14:17:13,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-26 14:17:13,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-26 14:17:13,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-26 14:17:13,699 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-26 14:17:14,223 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-26 14:17:14,224 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-26 14:17:14,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.01 02:17:14 BoogieIcfgContainer [2021-01-26 14:17:14,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-26 14:17:14,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-26 14:17:14,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-26 14:17:14,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-26 14:17:14,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.01 02:17:12" (1/3) ... [2021-01-26 14:17:14,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147bd21a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.01 02:17:14, skipping insertion in model container [2021-01-26 14:17:14,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:13" (2/3) ... [2021-01-26 14:17:14,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147bd21a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.01 02:17:14, skipping insertion in model container [2021-01-26 14:17:14,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.01 02:17:14" (3/3) ... [2021-01-26 14:17:14,241 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2021-01-26 14:17:14,258 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-26 14:17:14,259 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-26 14:17:14,263 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-26 14:17:14,264 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-26 14:17:14,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,311 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,311 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,311 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,312 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,312 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,312 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,313 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,313 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,314 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,314 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,314 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,314 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,316 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,316 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,316 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,316 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,317 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,317 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,317 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,317 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,317 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,318 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,318 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,318 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,318 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,320 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,320 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,320 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,321 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,321 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,321 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,321 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,322 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,322 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,323 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,323 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,323 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,324 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,325 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,325 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,326 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,326 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,327 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,327 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,327 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,327 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,328 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,328 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,329 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,329 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,329 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,329 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,329 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,330 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,330 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,330 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,332 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,333 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,336 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,336 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,336 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,336 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,337 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,337 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,343 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,344 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,345 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,345 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,345 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,345 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:14,354 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-26 14:17:14,369 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-26 14:17:14,409 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-26 14:17:14,409 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-26 14:17:14,409 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-26 14:17:14,409 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-26 14:17:14,409 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-26 14:17:14,410 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-26 14:17:14,411 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-26 14:17:14,411 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-26 14:17:14,427 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2021-01-26 14:17:14,577 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) [2021-01-26 14:17:14,588 INFO L276 IsEmpty]: Start isEmpty. Operand 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) [2021-01-26 14:17:14,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-26 14:17:14,603 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:14,604 INFO L504 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] [2021-01-26 14:17:14,604 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:14,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:14,611 INFO L82 PathProgramCache]: Analyzing trace with hash 2143390317, now seen corresponding path program 1 times [2021-01-26 14:17:14,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:14,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461680258] [2021-01-26 14:17:14,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:15,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461680258] [2021-01-26 14:17:15,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:15,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-26 14:17:15,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441957753] [2021-01-26 14:17:15,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-26 14:17:15,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:15,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-26 14:17:15,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-26 14:17:15,104 INFO L87 Difference]: Start difference. First operand 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) 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) [2021-01-26 14:17:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:15,327 INFO L93 Difference]: Finished difference Result 4034 states and 11738 transitions. [2021-01-26 14:17:15,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-26 14:17:15,330 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 [2021-01-26 14:17:15,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:15,359 INFO L225 Difference]: With dead ends: 4034 [2021-01-26 14:17:15,359 INFO L226 Difference]: Without dead ends: 1472 [2021-01-26 14:17:15,361 INFO L769 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 [2021-01-26 14:17:15,361 INFO L78 Accepts]: Start accepts. Automaton has 1472 states. Word has length 28 [2021-01-26 14:17:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:15,363 INFO L481 AbstractCegarLoop]: Abstraction has 1472 states. [2021-01-26 14:17:15,363 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) [2021-01-26 14:17:15,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states. [2021-01-26 14:17:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-26 14:17:15,372 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:15,372 INFO L504 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] [2021-01-26 14:17:15,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-26 14:17:15,373 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:15,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:15,374 INFO L82 PathProgramCache]: Analyzing trace with hash 409143693, now seen corresponding path program 1 times [2021-01-26 14:17:15,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:15,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790943790] [2021-01-26 14:17:15,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:15,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790943790] [2021-01-26 14:17:15,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:15,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-26 14:17:15,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833940811] [2021-01-26 14:17:15,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-26 14:17:15,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:15,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-26 14:17:15,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-26 14:17:15,565 INFO L87 Difference]: Start difference. First operand 1472 states. 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) [2021-01-26 14:17:15,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:15,706 INFO L93 Difference]: Finished difference Result 1856 states and 4981 transitions. [2021-01-26 14:17:15,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-26 14:17:15,707 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 [2021-01-26 14:17:15,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:15,719 INFO L225 Difference]: With dead ends: 1856 [2021-01-26 14:17:15,719 INFO L226 Difference]: Without dead ends: 1552 [2021-01-26 14:17:15,720 INFO L769 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 [2021-01-26 14:17:15,720 INFO L78 Accepts]: Start accepts. Automaton has 1552 states. Word has length 33 [2021-01-26 14:17:15,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:15,721 INFO L481 AbstractCegarLoop]: Abstraction has 1552 states. [2021-01-26 14:17:15,722 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) [2021-01-26 14:17:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states. [2021-01-26 14:17:15,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-26 14:17:15,725 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:15,725 INFO L504 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] [2021-01-26 14:17:15,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-26 14:17:15,725 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:15,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:15,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1822434001, now seen corresponding path program 2 times [2021-01-26 14:17:15,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:15,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581320006] [2021-01-26 14:17:15,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:15,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581320006] [2021-01-26 14:17:15,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:15,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-26 14:17:15,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446294294] [2021-01-26 14:17:15,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-26 14:17:15,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:15,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-26 14:17:15,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-26 14:17:15,851 INFO L87 Difference]: Start difference. First operand 1552 states. 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) [2021-01-26 14:17:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:16,007 INFO L93 Difference]: Finished difference Result 2064 states and 5525 transitions. [2021-01-26 14:17:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-26 14:17:16,008 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 [2021-01-26 14:17:16,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:16,021 INFO L225 Difference]: With dead ends: 2064 [2021-01-26 14:17:16,022 INFO L226 Difference]: Without dead ends: 1742 [2021-01-26 14:17:16,022 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:17:16,022 INFO L78 Accepts]: Start accepts. Automaton has 1742 states. Word has length 33 [2021-01-26 14:17:16,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:16,023 INFO L481 AbstractCegarLoop]: Abstraction has 1742 states. [2021-01-26 14:17:16,023 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) [2021-01-26 14:17:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1742 states. [2021-01-26 14:17:16,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-26 14:17:16,026 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:16,027 INFO L504 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] [2021-01-26 14:17:16,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-26 14:17:16,027 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:16,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:16,028 INFO L82 PathProgramCache]: Analyzing trace with hash 26886563, now seen corresponding path program 1 times [2021-01-26 14:17:16,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:16,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955470601] [2021-01-26 14:17:16,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:16,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955470601] [2021-01-26 14:17:16,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:16,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-26 14:17:16,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560572796] [2021-01-26 14:17:16,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-26 14:17:16,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:16,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-26 14:17:16,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-26 14:17:16,271 INFO L87 Difference]: Start difference. First operand 1742 states. 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) [2021-01-26 14:17:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:16,406 INFO L93 Difference]: Finished difference Result 2254 states and 6000 transitions. [2021-01-26 14:17:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-26 14:17:16,407 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 [2021-01-26 14:17:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:16,422 INFO L225 Difference]: With dead ends: 2254 [2021-01-26 14:17:16,422 INFO L226 Difference]: Without dead ends: 1996 [2021-01-26 14:17:16,422 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-26 14:17:16,423 INFO L78 Accepts]: Start accepts. Automaton has 1996 states. Word has length 33 [2021-01-26 14:17:16,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:16,423 INFO L481 AbstractCegarLoop]: Abstraction has 1996 states. [2021-01-26 14:17:16,423 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) [2021-01-26 14:17:16,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states. [2021-01-26 14:17:16,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:16,428 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:16,429 INFO L504 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] [2021-01-26 14:17:16,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-26 14:17:16,429 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:16,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:16,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1836185505, now seen corresponding path program 1 times [2021-01-26 14:17:16,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:16,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385532671] [2021-01-26 14:17:16,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:16,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385532671] [2021-01-26 14:17:16,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:16,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-26 14:17:16,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923305322] [2021-01-26 14:17:16,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-26 14:17:16,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:16,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-26 14:17:16,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-26 14:17:16,587 INFO L87 Difference]: Start difference. First operand 1996 states. 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) [2021-01-26 14:17:16,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:16,698 INFO L93 Difference]: Finished difference Result 2188 states and 5771 transitions. [2021-01-26 14:17:16,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-26 14:17:16,699 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 [2021-01-26 14:17:16,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:16,714 INFO L225 Difference]: With dead ends: 2188 [2021-01-26 14:17:16,714 INFO L226 Difference]: Without dead ends: 2036 [2021-01-26 14:17:16,715 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-01-26 14:17:16,715 INFO L78 Accepts]: Start accepts. Automaton has 2036 states. Word has length 38 [2021-01-26 14:17:16,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:16,716 INFO L481 AbstractCegarLoop]: Abstraction has 2036 states. [2021-01-26 14:17:16,716 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) [2021-01-26 14:17:16,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states. [2021-01-26 14:17:16,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:16,720 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:16,720 INFO L504 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] [2021-01-26 14:17:16,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-26 14:17:16,721 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:16,721 INFO L82 PathProgramCache]: Analyzing trace with hash 703073151, now seen corresponding path program 2 times [2021-01-26 14:17:16,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:16,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686658883] [2021-01-26 14:17:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:16,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686658883] [2021-01-26 14:17:16,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:16,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-26 14:17:16,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466303104] [2021-01-26 14:17:16,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-26 14:17:16,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:16,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-26 14:17:16,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-26 14:17:16,853 INFO L87 Difference]: Start difference. First operand 2036 states. 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) [2021-01-26 14:17:17,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:17,011 INFO L93 Difference]: Finished difference Result 2564 states and 6715 transitions. [2021-01-26 14:17:17,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-26 14:17:17,012 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 [2021-01-26 14:17:17,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:17,029 INFO L225 Difference]: With dead ends: 2564 [2021-01-26 14:17:17,029 INFO L226 Difference]: Without dead ends: 2306 [2021-01-26 14:17:17,030 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-01-26 14:17:17,030 INFO L78 Accepts]: Start accepts. Automaton has 2306 states. Word has length 38 [2021-01-26 14:17:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:17,030 INFO L481 AbstractCegarLoop]: Abstraction has 2306 states. [2021-01-26 14:17:17,030 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) [2021-01-26 14:17:17,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states. [2021-01-26 14:17:17,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:17,035 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:17,035 INFO L504 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] [2021-01-26 14:17:17,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-26 14:17:17,036 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:17,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:17,036 INFO L82 PathProgramCache]: Analyzing trace with hash -127797699, now seen corresponding path program 3 times [2021-01-26 14:17:17,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:17,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600783857] [2021-01-26 14:17:17,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:17,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600783857] [2021-01-26 14:17:17,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:17,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-26 14:17:17,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024446333] [2021-01-26 14:17:17,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-26 14:17:17,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:17,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-26 14:17:17,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-26 14:17:17,172 INFO L87 Difference]: Start difference. First operand 2306 states. 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) [2021-01-26 14:17:17,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:17,375 INFO L93 Difference]: Finished difference Result 3042 states and 7862 transitions. [2021-01-26 14:17:17,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-26 14:17:17,376 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 [2021-01-26 14:17:17,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:17,394 INFO L225 Difference]: With dead ends: 3042 [2021-01-26 14:17:17,395 INFO L226 Difference]: Without dead ends: 2736 [2021-01-26 14:17:17,395 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:17:17,395 INFO L78 Accepts]: Start accepts. Automaton has 2736 states. Word has length 38 [2021-01-26 14:17:17,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:17,396 INFO L481 AbstractCegarLoop]: Abstraction has 2736 states. [2021-01-26 14:17:17,396 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) [2021-01-26 14:17:17,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states. [2021-01-26 14:17:17,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:17,400 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:17,401 INFO L504 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] [2021-01-26 14:17:17,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-26 14:17:17,401 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:17,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:17,402 INFO L82 PathProgramCache]: Analyzing trace with hash -2059823446, now seen corresponding path program 1 times [2021-01-26 14:17:17,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:17,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121485690] [2021-01-26 14:17:17,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:17,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121485690] [2021-01-26 14:17:17,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083453483] [2021-01-26 14:17:17,589 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 [2021-01-26 14:17:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:17,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-26 14:17:17,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:17,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:17,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:17,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-01-26 14:17:17,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439976429] [2021-01-26 14:17:17,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-26 14:17:17,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:17,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-26 14:17:17,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:17:17,836 INFO L87 Difference]: Start difference. First operand 2736 states. 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) [2021-01-26 14:17:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:17,978 INFO L93 Difference]: Finished difference Result 3120 states and 7937 transitions. [2021-01-26 14:17:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-26 14:17:17,979 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 38 [2021-01-26 14:17:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:17,998 INFO L225 Difference]: With dead ends: 3120 [2021-01-26 14:17:17,999 INFO L226 Difference]: Without dead ends: 2816 [2021-01-26 14:17:17,999 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:18,000 INFO L78 Accepts]: Start accepts. Automaton has 2816 states. Word has length 38 [2021-01-26 14:17:18,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:18,000 INFO L481 AbstractCegarLoop]: Abstraction has 2816 states. [2021-01-26 14:17:18,000 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) [2021-01-26 14:17:18,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states. [2021-01-26 14:17:18,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:18,004 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:18,004 INFO L504 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] [2021-01-26 14:17:18,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-26 14:17:18,220 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:18,221 INFO L82 PathProgramCache]: Analyzing trace with hash -364831632, now seen corresponding path program 2 times [2021-01-26 14:17:18,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:18,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099286467] [2021-01-26 14:17:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:18,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099286467] [2021-01-26 14:17:18,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504901935] [2021-01-26 14:17:18,334 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 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 [2021-01-26 14:17:18,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:18,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:18,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-26 14:17:18,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:18,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:18,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:18,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-01-26 14:17:18,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974688853] [2021-01-26 14:17:18,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-26 14:17:18,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:18,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-26 14:17:18,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:17:18,516 INFO L87 Difference]: Start difference. First operand 2816 states. 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) [2021-01-26 14:17:18,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:18,687 INFO L93 Difference]: Finished difference Result 3200 states and 8097 transitions. [2021-01-26 14:17:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-26 14:17:18,688 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 38 [2021-01-26 14:17:18,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:18,698 INFO L225 Difference]: With dead ends: 3200 [2021-01-26 14:17:18,698 INFO L226 Difference]: Without dead ends: 2896 [2021-01-26 14:17:18,699 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-01-26 14:17:18,699 INFO L78 Accepts]: Start accepts. Automaton has 2896 states. Word has length 38 [2021-01-26 14:17:18,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:18,699 INFO L481 AbstractCegarLoop]: Abstraction has 2896 states. [2021-01-26 14:17:18,699 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) [2021-01-26 14:17:18,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states. [2021-01-26 14:17:18,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:18,704 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:18,704 INFO L504 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] [2021-01-26 14:17:18,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:18,918 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:18,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:18,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1048458676, now seen corresponding path program 3 times [2021-01-26 14:17:18,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:18,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729471542] [2021-01-26 14:17:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:19,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729471542] [2021-01-26 14:17:19,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563211579] [2021-01-26 14:17:19,032 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 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 [2021-01-26 14:17:19,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-26 14:17:19,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:19,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-26 14:17:19,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:19,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:19,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:19,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:19,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-01-26 14:17:19,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447661598] [2021-01-26 14:17:19,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-26 14:17:19,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:19,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-26 14:17:19,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:17:19,220 INFO L87 Difference]: Start difference. First operand 2896 states. 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) [2021-01-26 14:17:19,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:19,500 INFO L93 Difference]: Finished difference Result 3408 states and 8641 transitions. [2021-01-26 14:17:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-26 14:17:19,501 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 38 [2021-01-26 14:17:19,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:19,509 INFO L225 Difference]: With dead ends: 3408 [2021-01-26 14:17:19,509 INFO L226 Difference]: Without dead ends: 3086 [2021-01-26 14:17:19,510 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:19,510 INFO L78 Accepts]: Start accepts. Automaton has 3086 states. Word has length 38 [2021-01-26 14:17:19,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:19,511 INFO L481 AbstractCegarLoop]: Abstraction has 3086 states. [2021-01-26 14:17:19,511 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) [2021-01-26 14:17:19,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states. [2021-01-26 14:17:19,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:19,517 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:19,517 INFO L504 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] [2021-01-26 14:17:19,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-26 14:17:19,732 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:19,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:19,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1809094268, now seen corresponding path program 1 times [2021-01-26 14:17:19,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:19,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277846870] [2021-01-26 14:17:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:19,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277846870] [2021-01-26 14:17:19,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244691297] [2021-01-26 14:17:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-01-26 14:17:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:20,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:20,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:20,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:20,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:20,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:20,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999535122] [2021-01-26 14:17:20,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:20,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:20,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:20,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:20,138 INFO L87 Difference]: Start difference. First operand 3086 states. 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) [2021-01-26 14:17:20,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:20,345 INFO L93 Difference]: Finished difference Result 3470 states and 8732 transitions. [2021-01-26 14:17:20,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-26 14:17:20,346 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 [2021-01-26 14:17:20,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:20,355 INFO L225 Difference]: With dead ends: 3470 [2021-01-26 14:17:20,355 INFO L226 Difference]: Without dead ends: 3166 [2021-01-26 14:17:20,356 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:17:20,356 INFO L78 Accepts]: Start accepts. Automaton has 3166 states. Word has length 43 [2021-01-26 14:17:20,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:20,357 INFO L481 AbstractCegarLoop]: Abstraction has 3166 states. [2021-01-26 14:17:20,357 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) [2021-01-26 14:17:20,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3166 states. [2021-01-26 14:17:20,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:20,364 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:20,365 INFO L504 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] [2021-01-26 14:17:20,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:20,579 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:20,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:20,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1432941800, now seen corresponding path program 2 times [2021-01-26 14:17:20,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:20,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768194262] [2021-01-26 14:17:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:20,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768194262] [2021-01-26 14:17:20,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642959849] [2021-01-26 14:17:20,707 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 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 [2021-01-26 14:17:20,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:20,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:20,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:20,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:20,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:20,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:20,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:20,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146262552] [2021-01-26 14:17:20,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:20,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:20,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:20,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:20,903 INFO L87 Difference]: Start difference. First operand 3166 states. 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) [2021-01-26 14:17:21,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:21,145 INFO L93 Difference]: Finished difference Result 3358 states and 8444 transitions. [2021-01-26 14:17:21,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-26 14:17:21,146 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 [2021-01-26 14:17:21,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:21,156 INFO L225 Difference]: With dead ends: 3358 [2021-01-26 14:17:21,157 INFO L226 Difference]: Without dead ends: 3206 [2021-01-26 14:17:21,157 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:17:21,157 INFO L78 Accepts]: Start accepts. Automaton has 3206 states. Word has length 43 [2021-01-26 14:17:21,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:21,158 INFO L481 AbstractCegarLoop]: Abstraction has 3206 states. [2021-01-26 14:17:21,158 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) [2021-01-26 14:17:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states. [2021-01-26 14:17:21,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:21,165 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:21,165 INFO L504 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] [2021-01-26 14:17:21,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-26 14:17:21,381 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:21,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:21,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1083428478, now seen corresponding path program 3 times [2021-01-26 14:17:21,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:21,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128842630] [2021-01-26 14:17:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:21,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128842630] [2021-01-26 14:17:21,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943095568] [2021-01-26 14:17:21,559 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 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 [2021-01-26 14:17:21,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-26 14:17:21,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:21,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:21,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:21,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:21,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:21,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:21,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062386391] [2021-01-26 14:17:21,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:21,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:21,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:21,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:21,737 INFO L87 Difference]: Start difference. First operand 3206 states. 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) [2021-01-26 14:17:21,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:21,993 INFO L93 Difference]: Finished difference Result 3590 states and 8972 transitions. [2021-01-26 14:17:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-26 14:17:21,994 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 [2021-01-26 14:17:21,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:22,006 INFO L225 Difference]: With dead ends: 3590 [2021-01-26 14:17:22,006 INFO L226 Difference]: Without dead ends: 3286 [2021-01-26 14:17:22,007 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:17:22,007 INFO L78 Accepts]: Start accepts. Automaton has 3286 states. Word has length 43 [2021-01-26 14:17:22,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:22,007 INFO L481 AbstractCegarLoop]: Abstraction has 3286 states. [2021-01-26 14:17:22,007 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) [2021-01-26 14:17:22,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states. [2021-01-26 14:17:22,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:22,014 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:22,015 INFO L504 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] [2021-01-26 14:17:22,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:22,228 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:22,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:22,229 INFO L82 PathProgramCache]: Analyzing trace with hash 615590430, now seen corresponding path program 4 times [2021-01-26 14:17:22,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:22,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501442724] [2021-01-26 14:17:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:22,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501442724] [2021-01-26 14:17:22,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013914471] [2021-01-26 14:17:22,380 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 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 [2021-01-26 14:17:22,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:17:22,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:22,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:22,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:22,536 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:22,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:22,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:22,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:22,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073951144] [2021-01-26 14:17:22,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:22,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:22,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:22,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:22,555 INFO L87 Difference]: Start difference. First operand 3286 states. 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) [2021-01-26 14:17:22,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:22,988 INFO L93 Difference]: Finished difference Result 4444 states and 11047 transitions. [2021-01-26 14:17:22,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-26 14:17:22,989 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 [2021-01-26 14:17:22,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:23,001 INFO L225 Difference]: With dead ends: 4444 [2021-01-26 14:17:23,001 INFO L226 Difference]: Without dead ends: 4080 [2021-01-26 14:17:23,002 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2021-01-26 14:17:23,002 INFO L78 Accepts]: Start accepts. Automaton has 4080 states. Word has length 43 [2021-01-26 14:17:23,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:23,002 INFO L481 AbstractCegarLoop]: Abstraction has 4080 states. [2021-01-26 14:17:23,002 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) [2021-01-26 14:17:23,003 INFO L276 IsEmpty]: Start isEmpty. Operand 4080 states. [2021-01-26 14:17:23,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:23,008 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:23,009 INFO L504 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] [2021-01-26 14:17:23,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-26 14:17:23,225 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:23,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:23,227 INFO L82 PathProgramCache]: Analyzing trace with hash -215280420, now seen corresponding path program 5 times [2021-01-26 14:17:23,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:23,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429651594] [2021-01-26 14:17:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:23,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429651594] [2021-01-26 14:17:23,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788702163] [2021-01-26 14:17:23,420 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 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 [2021-01-26 14:17:23,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:23,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:23,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:23,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:23,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:23,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:23,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:23,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-26 14:17:23,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414722596] [2021-01-26 14:17:23,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-26 14:17:23,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:23,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-26 14:17:23,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:17:23,649 INFO L87 Difference]: Start difference. First operand 4080 states. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:24,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:24,550 INFO L93 Difference]: Finished difference Result 6294 states and 15608 transitions. [2021-01-26 14:17:24,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-26 14:17:24,551 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 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 [2021-01-26 14:17:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:24,570 INFO L225 Difference]: With dead ends: 6294 [2021-01-26 14:17:24,571 INFO L226 Difference]: Without dead ends: 5390 [2021-01-26 14:17:24,572 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-01-26 14:17:24,572 INFO L78 Accepts]: Start accepts. Automaton has 5390 states. Word has length 43 [2021-01-26 14:17:24,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:24,572 INFO L481 AbstractCegarLoop]: Abstraction has 5390 states. [2021-01-26 14:17:24,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:24,573 INFO L276 IsEmpty]: Start isEmpty. Operand 5390 states. [2021-01-26 14:17:24,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:24,580 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:24,580 INFO L504 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] [2021-01-26 14:17:24,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-26 14:17:24,795 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:24,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:24,796 INFO L82 PathProgramCache]: Analyzing trace with hash -55830870, now seen corresponding path program 1 times [2021-01-26 14:17:24,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:24,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725393791] [2021-01-26 14:17:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:24,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725393791] [2021-01-26 14:17:24,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515893313] [2021-01-26 14:17:24,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-01-26 14:17:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:25,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:25,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:25,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:25,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:25,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:25,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:25,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-26 14:17:25,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561253458] [2021-01-26 14:17:25,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-26 14:17:25,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:25,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-26 14:17:25,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:17:25,244 INFO L87 Difference]: Start difference. First operand 5390 states. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:25,991 INFO L93 Difference]: Finished difference Result 7028 states and 17199 transitions. [2021-01-26 14:17:25,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-26 14:17:25,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 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 [2021-01-26 14:17:25,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:26,008 INFO L225 Difference]: With dead ends: 7028 [2021-01-26 14:17:26,008 INFO L226 Difference]: Without dead ends: 6440 [2021-01-26 14:17:26,009 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=828, Unknown=0, NotChecked=0, Total=1056 [2021-01-26 14:17:26,009 INFO L78 Accepts]: Start accepts. Automaton has 6440 states. Word has length 43 [2021-01-26 14:17:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:26,009 INFO L481 AbstractCegarLoop]: Abstraction has 6440 states. [2021-01-26 14:17:26,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:26,010 INFO L276 IsEmpty]: Start isEmpty. Operand 6440 states. [2021-01-26 14:17:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:26,020 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:26,020 INFO L504 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] [2021-01-26 14:17:26,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-26 14:17:26,233 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:26,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:26,234 INFO L82 PathProgramCache]: Analyzing trace with hash -773458049, now seen corresponding path program 6 times [2021-01-26 14:17:26,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:26,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861094498] [2021-01-26 14:17:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:26,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861094498] [2021-01-26 14:17:26,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135316311] [2021-01-26 14:17:26,433 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 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 [2021-01-26 14:17:26,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:17:26,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:26,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:26,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:26,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:26,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:26,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:26,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905650041] [2021-01-26 14:17:26,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:26,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:26,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:26,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:26,685 INFO L87 Difference]: Start difference. First operand 6440 states. 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) [2021-01-26 14:17:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:26,960 INFO L93 Difference]: Finished difference Result 6752 states and 16277 transitions. [2021-01-26 14:17:26,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-26 14:17:26,961 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 [2021-01-26 14:17:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:26,968 INFO L225 Difference]: With dead ends: 6752 [2021-01-26 14:17:26,969 INFO L226 Difference]: Without dead ends: 6600 [2021-01-26 14:17:26,969 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:17:26,969 INFO L78 Accepts]: Start accepts. Automaton has 6600 states. Word has length 48 [2021-01-26 14:17:26,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:26,970 INFO L481 AbstractCegarLoop]: Abstraction has 6600 states. [2021-01-26 14:17:26,970 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) [2021-01-26 14:17:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 6600 states. [2021-01-26 14:17:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:26,979 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:26,979 INFO L504 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] [2021-01-26 14:17:27,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-26 14:17:27,196 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:27,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:27,197 INFO L82 PathProgramCache]: Analyzing trace with hash -629767183, now seen corresponding path program 1 times [2021-01-26 14:17:27,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:27,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183879670] [2021-01-26 14:17:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:27,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183879670] [2021-01-26 14:17:27,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789085033] [2021-01-26 14:17:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-01-26 14:17:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:27,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:27,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:27,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:27,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:27,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:27,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703244485] [2021-01-26 14:17:27,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:27,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:27,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:27,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:27,581 INFO L87 Difference]: Start difference. First operand 6600 states. 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) [2021-01-26 14:17:27,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:27,903 INFO L93 Difference]: Finished difference Result 6792 states and 16357 transitions. [2021-01-26 14:17:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-26 14:17:27,908 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 [2021-01-26 14:17:27,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:27,919 INFO L225 Difference]: With dead ends: 6792 [2021-01-26 14:17:27,919 INFO L226 Difference]: Without dead ends: 6640 [2021-01-26 14:17:27,920 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:17:27,920 INFO L78 Accepts]: Start accepts. Automaton has 6640 states. Word has length 48 [2021-01-26 14:17:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:27,920 INFO L481 AbstractCegarLoop]: Abstraction has 6640 states. [2021-01-26 14:17:27,920 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) [2021-01-26 14:17:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 6640 states. [2021-01-26 14:17:27,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:27,930 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:27,930 INFO L504 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] [2021-01-26 14:17:28,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-26 14:17:28,145 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:28,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2054932487, now seen corresponding path program 2 times [2021-01-26 14:17:28,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:28,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153581185] [2021-01-26 14:17:28,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:28,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153581185] [2021-01-26 14:17:28,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206751982] [2021-01-26 14:17:28,280 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 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 [2021-01-26 14:17:28,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:28,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:28,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:28,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:28,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:28,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:28,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:28,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701325895] [2021-01-26 14:17:28,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:28,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:28,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:28,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:28,504 INFO L87 Difference]: Start difference. First operand 6640 states. 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) [2021-01-26 14:17:28,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:28,885 INFO L93 Difference]: Finished difference Result 6832 states and 16437 transitions. [2021-01-26 14:17:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-26 14:17:28,886 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 [2021-01-26 14:17:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:28,895 INFO L225 Difference]: With dead ends: 6832 [2021-01-26 14:17:28,896 INFO L226 Difference]: Without dead ends: 6680 [2021-01-26 14:17:28,896 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-01-26 14:17:28,896 INFO L78 Accepts]: Start accepts. Automaton has 6680 states. Word has length 48 [2021-01-26 14:17:28,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:28,897 INFO L481 AbstractCegarLoop]: Abstraction has 6680 states. [2021-01-26 14:17:28,897 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) [2021-01-26 14:17:28,897 INFO L276 IsEmpty]: Start isEmpty. Operand 6680 states. [2021-01-26 14:17:28,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:28,906 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:28,906 INFO L504 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] [2021-01-26 14:17:29,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:29,121 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:29,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:29,121 INFO L82 PathProgramCache]: Analyzing trace with hash -172515643, now seen corresponding path program 7 times [2021-01-26 14:17:29,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:29,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310817685] [2021-01-26 14:17:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:29,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310817685] [2021-01-26 14:17:29,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042713019] [2021-01-26 14:17:29,257 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 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 [2021-01-26 14:17:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:29,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:29,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:29,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:29,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:29,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:29,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986612512] [2021-01-26 14:17:29,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:29,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:29,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:29,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:29,494 INFO L87 Difference]: Start difference. First operand 6680 states. 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) [2021-01-26 14:17:29,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:29,792 INFO L93 Difference]: Finished difference Result 6992 states and 16757 transitions. [2021-01-26 14:17:29,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-26 14:17:29,792 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 [2021-01-26 14:17:29,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:29,801 INFO L225 Difference]: With dead ends: 6992 [2021-01-26 14:17:29,801 INFO L226 Difference]: Without dead ends: 6840 [2021-01-26 14:17:29,802 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-01-26 14:17:29,802 INFO L78 Accepts]: Start accepts. Automaton has 6840 states. Word has length 48 [2021-01-26 14:17:29,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:29,802 INFO L481 AbstractCegarLoop]: Abstraction has 6840 states. [2021-01-26 14:17:29,802 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) [2021-01-26 14:17:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states. [2021-01-26 14:17:29,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:29,809 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:29,810 INFO L504 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] [2021-01-26 14:17:30,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-01-26 14:17:30,012 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:30,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:30,013 INFO L82 PathProgramCache]: Analyzing trace with hash -28824777, now seen corresponding path program 3 times [2021-01-26 14:17:30,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:30,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910644914] [2021-01-26 14:17:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:30,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910644914] [2021-01-26 14:17:30,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082356875] [2021-01-26 14:17:30,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:30,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-26 14:17:30,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:30,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:30,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:30,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:30,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:30,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:30,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022819700] [2021-01-26 14:17:30,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:30,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:30,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:30,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:30,456 INFO L87 Difference]: Start difference. First operand 6840 states. 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) [2021-01-26 14:17:30,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:30,771 INFO L93 Difference]: Finished difference Result 7032 states and 16837 transitions. [2021-01-26 14:17:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-26 14:17:30,772 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 [2021-01-26 14:17:30,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:30,780 INFO L225 Difference]: With dead ends: 7032 [2021-01-26 14:17:30,781 INFO L226 Difference]: Without dead ends: 6880 [2021-01-26 14:17:30,781 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-01-26 14:17:30,781 INFO L78 Accepts]: Start accepts. Automaton has 6880 states. Word has length 48 [2021-01-26 14:17:30,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:30,781 INFO L481 AbstractCegarLoop]: Abstraction has 6880 states. [2021-01-26 14:17:30,781 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) [2021-01-26 14:17:30,782 INFO L276 IsEmpty]: Start isEmpty. Operand 6880 states. [2021-01-26 14:17:30,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:30,788 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:30,788 INFO L504 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] [2021-01-26 14:17:31,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:31,004 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:31,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:31,004 INFO L82 PathProgramCache]: Analyzing trace with hash -601883841, now seen corresponding path program 8 times [2021-01-26 14:17:31,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:31,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624938861] [2021-01-26 14:17:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:31,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624938861] [2021-01-26 14:17:31,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040984511] [2021-01-26 14:17:31,147 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 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 [2021-01-26 14:17:31,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:31,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:31,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:31,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:31,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:31,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:31,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:31,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725305877] [2021-01-26 14:17:31,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:31,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:31,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:31,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:31,374 INFO L87 Difference]: Start difference. First operand 6880 states. 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) [2021-01-26 14:17:31,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:31,697 INFO L93 Difference]: Finished difference Result 7232 states and 17237 transitions. [2021-01-26 14:17:31,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-26 14:17:31,698 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 [2021-01-26 14:17:31,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:31,707 INFO L225 Difference]: With dead ends: 7232 [2021-01-26 14:17:31,707 INFO L226 Difference]: Without dead ends: 7080 [2021-01-26 14:17:31,707 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:17:31,707 INFO L78 Accepts]: Start accepts. Automaton has 7080 states. Word has length 48 [2021-01-26 14:17:31,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:31,708 INFO L481 AbstractCegarLoop]: Abstraction has 7080 states. [2021-01-26 14:17:31,708 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) [2021-01-26 14:17:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 7080 states. [2021-01-26 14:17:31,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:31,715 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:31,715 INFO L504 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] [2021-01-26 14:17:31,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-26 14:17:31,916 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:31,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:31,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1900592739, now seen corresponding path program 9 times [2021-01-26 14:17:31,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:31,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244752459] [2021-01-26 14:17:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:32,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244752459] [2021-01-26 14:17:32,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610761355] [2021-01-26 14:17:32,064 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 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 [2021-01-26 14:17:32,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:17:32,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:32,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:32,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:32,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:33,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:33,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:33,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-26 14:17:33,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202743563] [2021-01-26 14:17:33,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-26 14:17:33,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:33,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-26 14:17:33,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=199, Unknown=1, NotChecked=0, Total=272 [2021-01-26 14:17:33,851 INFO L87 Difference]: Start difference. First operand 7080 states. 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) [2021-01-26 14:17:37,752 WARN L193 SmtUtils]: Spent 3.54 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-01-26 14:17:42,067 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-01-26 14:18:26,579 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-01-26 14:21:16,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:16,274 INFO L93 Difference]: Finished difference Result 10527 states and 25585 transitions. [2021-01-26 14:21:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-26 14:21:16,307 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 [2021-01-26 14:21:16,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:16,321 INFO L225 Difference]: With dead ends: 10527 [2021-01-26 14:21:16,321 INFO L226 Difference]: Without dead ends: 9871 [2021-01-26 14:21:16,322 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=369, Invalid=1253, Unknown=18, NotChecked=0, Total=1640 [2021-01-26 14:21:16,322 INFO L78 Accepts]: Start accepts. Automaton has 9871 states. Word has length 48 [2021-01-26 14:21:16,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:16,322 INFO L481 AbstractCegarLoop]: Abstraction has 9871 states. [2021-01-26 14:21:16,323 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) [2021-01-26 14:21:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 9871 states. [2021-01-26 14:21:16,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:21:16,333 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:16,334 INFO L504 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] [2021-01-26 14:21:16,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:16,548 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:16,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:16,549 INFO L82 PathProgramCache]: Analyzing trace with hash 686139833, now seen corresponding path program 10 times [2021-01-26 14:21:16,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:16,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428751695] [2021-01-26 14:21:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:16,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428751695] [2021-01-26 14:21:16,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170074338] [2021-01-26 14:21:16,721 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 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 [2021-01-26 14:21:16,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:21:16,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:16,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:21:16,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:16,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:16,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:16,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:21:16,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419764907] [2021-01-26 14:21:16,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:21:16,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:16,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:21:16,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:21:16,996 INFO L87 Difference]: Start difference. First operand 9871 states. 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) [2021-01-26 14:21:17,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:17,466 INFO L93 Difference]: Finished difference Result 9935 states and 23876 transitions. [2021-01-26 14:21:17,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-26 14:21:17,466 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 [2021-01-26 14:21:17,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:17,479 INFO L225 Difference]: With dead ends: 9935 [2021-01-26 14:21:17,479 INFO L226 Difference]: Without dead ends: 9607 [2021-01-26 14:21:17,479 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-01-26 14:21:17,479 INFO L78 Accepts]: Start accepts. Automaton has 9607 states. Word has length 48 [2021-01-26 14:21:17,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:17,479 INFO L481 AbstractCegarLoop]: Abstraction has 9607 states. [2021-01-26 14:21:17,480 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) [2021-01-26 14:21:17,480 INFO L276 IsEmpty]: Start isEmpty. Operand 9607 states. [2021-01-26 14:21:17,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:21:17,488 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:17,489 INFO L504 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] [2021-01-26 14:21:17,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-26 14:21:17,696 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:17,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:17,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1741143189, now seen corresponding path program 4 times [2021-01-26 14:21:17,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:17,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108858247] [2021-01-26 14:21:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:17,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108858247] [2021-01-26 14:21:17,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656907685] [2021-01-26 14:21:17,860 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 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 [2021-01-26 14:21:17,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:21:17,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:17,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:21:17,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:18,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:21:18,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:18,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:18,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:21:18,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275820109] [2021-01-26 14:21:18,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:21:18,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:18,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:21:18,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:21:18,229 INFO L87 Difference]: Start difference. First operand 9607 states. 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) [2021-01-26 14:21:19,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:19,166 INFO L93 Difference]: Finished difference Result 11118 states and 26703 transitions. [2021-01-26 14:21:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-26 14:21:19,168 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 [2021-01-26 14:21:19,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:19,181 INFO L225 Difference]: With dead ends: 11118 [2021-01-26 14:21:19,181 INFO L226 Difference]: Without dead ends: 10736 [2021-01-26 14:21:19,181 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=284, Invalid=906, Unknown=0, NotChecked=0, Total=1190 [2021-01-26 14:21:19,182 INFO L78 Accepts]: Start accepts. Automaton has 10736 states. Word has length 48 [2021-01-26 14:21:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:19,182 INFO L481 AbstractCegarLoop]: Abstraction has 10736 states. [2021-01-26 14:21:19,182 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) [2021-01-26 14:21:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 10736 states. [2021-01-26 14:21:19,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:21:19,190 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:19,190 INFO L504 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] [2021-01-26 14:21:19,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-26 14:21:19,391 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:19,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:19,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1533122351, now seen corresponding path program 5 times [2021-01-26 14:21:19,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:19,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142357829] [2021-01-26 14:21:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:19,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142357829] [2021-01-26 14:21:19,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139612470] [2021-01-26 14:21:19,592 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 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 [2021-01-26 14:21:19,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:21:19,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:19,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:21:19,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:19,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:19,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:19,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:21:19,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672528656] [2021-01-26 14:21:19,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:21:19,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:19,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:21:19,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:21:19,861 INFO L87 Difference]: Start difference. First operand 10736 states. 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) [2021-01-26 14:21:20,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:20,685 INFO L93 Difference]: Finished difference Result 11486 states and 27277 transitions. [2021-01-26 14:21:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:21:20,686 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 [2021-01-26 14:21:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:20,702 INFO L225 Difference]: With dead ends: 11486 [2021-01-26 14:21:20,703 INFO L226 Difference]: Without dead ends: 11334 [2021-01-26 14:21:20,703 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:21:20,703 INFO L78 Accepts]: Start accepts. Automaton has 11334 states. Word has length 48 [2021-01-26 14:21:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:20,704 INFO L481 AbstractCegarLoop]: Abstraction has 11334 states. [2021-01-26 14:21:20,704 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) [2021-01-26 14:21:20,704 INFO L276 IsEmpty]: Start isEmpty. Operand 11334 states. [2021-01-26 14:21:20,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:21:20,711 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:20,712 INFO L504 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] [2021-01-26 14:21:20,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-26 14:21:20,918 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:20,919 INFO L82 PathProgramCache]: Analyzing trace with hash -119832043, now seen corresponding path program 6 times [2021-01-26 14:21:20,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:20,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405920234] [2021-01-26 14:21:20,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:21,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405920234] [2021-01-26 14:21:21,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596972672] [2021-01-26 14:21:21,104 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 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 [2021-01-26 14:21:21,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:21:21,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:21,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:21:21,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:21,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:21:21,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:21,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:21,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:21:21,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886310834] [2021-01-26 14:21:21,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:21:21,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:21,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:21:21,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:21:21,342 INFO L87 Difference]: Start difference. First operand 11334 states. 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) [2021-01-26 14:21:22,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:22,756 INFO L93 Difference]: Finished difference Result 13045 states and 30585 transitions. [2021-01-26 14:21:22,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-26 14:21:22,757 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 [2021-01-26 14:21:22,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:22,773 INFO L225 Difference]: With dead ends: 13045 [2021-01-26 14:21:22,774 INFO L226 Difference]: Without dead ends: 12379 [2021-01-26 14:21:22,774 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=488, Invalid=1674, Unknown=0, NotChecked=0, Total=2162 [2021-01-26 14:21:22,774 INFO L78 Accepts]: Start accepts. Automaton has 12379 states. Word has length 48 [2021-01-26 14:21:22,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:22,775 INFO L481 AbstractCegarLoop]: Abstraction has 12379 states. [2021-01-26 14:21:22,775 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) [2021-01-26 14:21:22,775 INFO L276 IsEmpty]: Start isEmpty. Operand 12379 states. [2021-01-26 14:21:22,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:21:22,785 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:22,785 INFO L504 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] [2021-01-26 14:21:22,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-26 14:21:22,986 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:22,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:22,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1611394660, now seen corresponding path program 11 times [2021-01-26 14:21:22,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:22,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851513349] [2021-01-26 14:21:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:23,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851513349] [2021-01-26 14:21:23,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762003076] [2021-01-26 14:21:23,221 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 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 [2021-01-26 14:21:23,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:21:23,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:23,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:21:23,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:23,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:23,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:23,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:21:23,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059388719] [2021-01-26 14:21:23,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:21:23,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:23,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:21:23,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:21:23,539 INFO L87 Difference]: Start difference. First operand 12379 states. 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) [2021-01-26 14:21:23,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:23,945 INFO L93 Difference]: Finished difference Result 12696 states and 29495 transitions. [2021-01-26 14:21:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-26 14:21:23,946 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 [2021-01-26 14:21:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:23,968 INFO L225 Difference]: With dead ends: 12696 [2021-01-26 14:21:23,968 INFO L226 Difference]: Without dead ends: 12544 [2021-01-26 14:21:23,968 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-01-26 14:21:23,968 INFO L78 Accepts]: Start accepts. Automaton has 12544 states. Word has length 53 [2021-01-26 14:21:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:23,969 INFO L481 AbstractCegarLoop]: Abstraction has 12544 states. [2021-01-26 14:21:23,969 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) [2021-01-26 14:21:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 12544 states. [2021-01-26 14:21:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:21:23,981 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:23,981 INFO L504 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] [2021-01-26 14:21:24,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-26 14:21:24,182 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:24,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:24,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1987547128, now seen corresponding path program 12 times [2021-01-26 14:21:24,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:24,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951234599] [2021-01-26 14:21:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:24,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951234599] [2021-01-26 14:21:24,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643037304] [2021-01-26 14:21:24,439 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 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 [2021-01-26 14:21:24,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:21:24,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:24,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:21:24,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:24,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:24,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:24,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:21:24,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288145071] [2021-01-26 14:21:24,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:21:24,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:24,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:21:24,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:21:24,803 INFO L87 Difference]: Start difference. First operand 12544 states. 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) [2021-01-26 14:21:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:25,486 INFO L93 Difference]: Finished difference Result 13008 states and 30183 transitions. [2021-01-26 14:21:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-26 14:21:25,487 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 [2021-01-26 14:21:25,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:25,503 INFO L225 Difference]: With dead ends: 13008 [2021-01-26 14:21:25,503 INFO L226 Difference]: Without dead ends: 12704 [2021-01-26 14:21:25,504 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2021-01-26 14:21:25,504 INFO L78 Accepts]: Start accepts. Automaton has 12704 states. Word has length 53 [2021-01-26 14:21:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:25,504 INFO L481 AbstractCegarLoop]: Abstraction has 12704 states. [2021-01-26 14:21:25,504 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) [2021-01-26 14:21:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 12704 states. [2021-01-26 14:21:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:21:25,516 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:25,516 INFO L504 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] [2021-01-26 14:21:25,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:25,717 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:25,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:25,718 INFO L82 PathProgramCache]: Analyzing trace with hash 144817900, now seen corresponding path program 7 times [2021-01-26 14:21:25,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:25,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093940003] [2021-01-26 14:21:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:25,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093940003] [2021-01-26 14:21:25,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881213672] [2021-01-26 14:21:25,913 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 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 [2021-01-26 14:21:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:25,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:21:25,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:26,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:26,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:26,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:21:26,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085469637] [2021-01-26 14:21:26,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:21:26,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:26,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:21:26,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:21:26,187 INFO L87 Difference]: Start difference. First operand 12704 states. 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) [2021-01-26 14:21:26,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:26,715 INFO L93 Difference]: Finished difference Result 12936 states and 29975 transitions. [2021-01-26 14:21:26,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-26 14:21:26,715 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 [2021-01-26 14:21:26,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:26,731 INFO L225 Difference]: With dead ends: 12936 [2021-01-26 14:21:26,731 INFO L226 Difference]: Without dead ends: 12784 [2021-01-26 14:21:26,732 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-01-26 14:21:26,732 INFO L78 Accepts]: Start accepts. Automaton has 12784 states. Word has length 53 [2021-01-26 14:21:26,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:26,732 INFO L481 AbstractCegarLoop]: Abstraction has 12784 states. [2021-01-26 14:21:26,732 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) [2021-01-26 14:21:26,732 INFO L276 IsEmpty]: Start isEmpty. Operand 12784 states. [2021-01-26 14:21:26,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:21:26,746 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:26,746 INFO L504 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] [2021-01-26 14:21:26,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:26,961 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash -253297978, now seen corresponding path program 8 times [2021-01-26 14:21:26,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:26,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157310618] [2021-01-26 14:21:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:27,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157310618] [2021-01-26 14:21:27,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928416974] [2021-01-26 14:21:27,164 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 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 [2021-01-26 14:21:27,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:21:27,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:27,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:21:27,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:27,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:27,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:27,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:21:27,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221457336] [2021-01-26 14:21:27,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:21:27,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:27,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:21:27,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:21:27,482 INFO L87 Difference]: Start difference. First operand 12784 states. 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) [2021-01-26 14:21:28,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:28,005 INFO L93 Difference]: Finished difference Result 13176 states and 30455 transitions. [2021-01-26 14:21:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-26 14:21:28,006 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 [2021-01-26 14:21:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:28,022 INFO L225 Difference]: With dead ends: 13176 [2021-01-26 14:21:28,022 INFO L226 Difference]: Without dead ends: 13024 [2021-01-26 14:21:28,023 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-01-26 14:21:28,023 INFO L78 Accepts]: Start accepts. Automaton has 13024 states. Word has length 53 [2021-01-26 14:21:28,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:28,023 INFO L481 AbstractCegarLoop]: Abstraction has 13024 states. [2021-01-26 14:21:28,024 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) [2021-01-26 14:21:28,024 INFO L276 IsEmpty]: Start isEmpty. Operand 13024 states. [2021-01-26 14:21:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:21:28,038 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:28,039 INFO L504 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] [2021-01-26 14:21:28,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:28,255 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:28,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:28,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1610795128, now seen corresponding path program 9 times [2021-01-26 14:21:28,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:28,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806989767] [2021-01-26 14:21:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:28,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806989767] [2021-01-26 14:21:28,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015041928] [2021-01-26 14:21:28,567 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 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 [2021-01-26 14:21:28,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-26 14:21:28,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:28,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:21:28,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:28,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:28,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:28,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:21:28,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616343871] [2021-01-26 14:21:28,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:21:28,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:28,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:21:28,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:21:28,856 INFO L87 Difference]: Start difference. First operand 13024 states. 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) [2021-01-26 14:21:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:29,453 INFO L93 Difference]: Finished difference Result 13296 states and 30695 transitions. [2021-01-26 14:21:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-26 14:21:29,454 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 [2021-01-26 14:21:29,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:29,473 INFO L225 Difference]: With dead ends: 13296 [2021-01-26 14:21:29,473 INFO L226 Difference]: Without dead ends: 13144 [2021-01-26 14:21:29,474 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-01-26 14:21:29,474 INFO L78 Accepts]: Start accepts. Automaton has 13144 states. Word has length 53 [2021-01-26 14:21:29,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:29,474 INFO L481 AbstractCegarLoop]: Abstraction has 13144 states. [2021-01-26 14:21:29,474 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) [2021-01-26 14:21:29,475 INFO L276 IsEmpty]: Start isEmpty. Operand 13144 states. [2021-01-26 14:21:29,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:21:29,486 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:29,486 INFO L504 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] [2021-01-26 14:21:29,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-26 14:21:29,687 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:29,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:29,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1156131728, now seen corresponding path program 10 times [2021-01-26 14:21:29,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:29,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11182770] [2021-01-26 14:21:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:29,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11182770] [2021-01-26 14:21:29,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260736399] [2021-01-26 14:21:29,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:29,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:21:29,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:29,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:21:29,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:30,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:30,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:30,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:21:30,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577200672] [2021-01-26 14:21:30,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:21:30,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:30,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:21:30,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:21:30,208 INFO L87 Difference]: Start difference. First operand 13144 states. 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) [2021-01-26 14:21:30,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:30,880 INFO L93 Difference]: Finished difference Result 13376 states and 30855 transitions. [2021-01-26 14:21:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-26 14:21:30,881 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 [2021-01-26 14:21:30,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:30,896 INFO L225 Difference]: With dead ends: 13376 [2021-01-26 14:21:30,896 INFO L226 Difference]: Without dead ends: 13224 [2021-01-26 14:21:30,897 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:21:30,897 INFO L78 Accepts]: Start accepts. Automaton has 13224 states. Word has length 53 [2021-01-26 14:21:30,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:30,897 INFO L481 AbstractCegarLoop]: Abstraction has 13224 states. [2021-01-26 14:21:30,898 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) [2021-01-26 14:21:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 13224 states. [2021-01-26 14:21:30,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:21:30,908 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:30,909 INFO L504 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] [2021-01-26 14:21:31,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:31,113 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:31,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1985432118, now seen corresponding path program 11 times [2021-01-26 14:21:31,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:31,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193094384] [2021-01-26 14:21:31,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:31,320 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 9 [2021-01-26 14:21:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:31,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193094384] [2021-01-26 14:21:31,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958656457] [2021-01-26 14:21:31,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:31,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:21:31,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:31,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:21:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:31,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:31,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:31,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:21:31,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629844306] [2021-01-26 14:21:31,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:21:31,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:31,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:21:31,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:21:31,738 INFO L87 Difference]: Start difference. First operand 13224 states. 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) [2021-01-26 14:21:32,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:32,473 INFO L93 Difference]: Finished difference Result 13536 states and 31175 transitions. [2021-01-26 14:21:32,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:21:32,474 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 [2021-01-26 14:21:32,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:32,490 INFO L225 Difference]: With dead ends: 13536 [2021-01-26 14:21:32,491 INFO L226 Difference]: Without dead ends: 13384 [2021-01-26 14:21:32,491 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:21:32,491 INFO L78 Accepts]: Start accepts. Automaton has 13384 states. Word has length 53 [2021-01-26 14:21:32,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:32,492 INFO L481 AbstractCegarLoop]: Abstraction has 13384 states. [2021-01-26 14:21:32,492 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) [2021-01-26 14:21:32,492 INFO L276 IsEmpty]: Start isEmpty. Operand 13384 states. [2021-01-26 14:21:32,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:21:32,507 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:32,507 INFO L504 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] [2021-01-26 14:21:32,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-26 14:21:32,718 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:32,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:32,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1738400478, now seen corresponding path program 13 times [2021-01-26 14:21:32,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:32,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535386281] [2021-01-26 14:21:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:32,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535386281] [2021-01-26 14:21:32,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282774050] [2021-01-26 14:21:32,913 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 [2021-01-26 14:21:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:32,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:21:32,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:33,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:33,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:33,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:21:33,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608844541] [2021-01-26 14:21:33,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:21:33,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:33,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:21:33,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:21:33,199 INFO L87 Difference]: Start difference. First operand 13384 states. 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) [2021-01-26 14:21:33,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:33,664 INFO L93 Difference]: Finished difference Result 13701 states and 31505 transitions. [2021-01-26 14:21:33,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-26 14:21:33,666 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 [2021-01-26 14:21:33,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:33,685 INFO L225 Difference]: With dead ends: 13701 [2021-01-26 14:21:33,685 INFO L226 Difference]: Without dead ends: 13549 [2021-01-26 14:21:33,686 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-01-26 14:21:33,686 INFO L78 Accepts]: Start accepts. Automaton has 13549 states. Word has length 53 [2021-01-26 14:21:33,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:33,686 INFO L481 AbstractCegarLoop]: Abstraction has 13549 states. [2021-01-26 14:21:33,686 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) [2021-01-26 14:21:33,686 INFO L276 IsEmpty]: Start isEmpty. Operand 13549 states. [2021-01-26 14:21:33,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:21:33,698 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:33,699 INFO L504 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] [2021-01-26 14:21:33,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:33,900 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:33,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:33,900 INFO L82 PathProgramCache]: Analyzing trace with hash 2114552946, now seen corresponding path program 14 times [2021-01-26 14:21:33,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:33,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913227003] [2021-01-26 14:21:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:34,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913227003] [2021-01-26 14:21:34,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746864138] [2021-01-26 14:21:34,175 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 [2021-01-26 14:21:34,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:21:34,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:34,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:21:34,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:34,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:34,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:34,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:21:34,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970350418] [2021-01-26 14:21:34,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:21:34,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:34,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:21:34,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:21:34,491 INFO L87 Difference]: Start difference. First operand 13549 states. 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) [2021-01-26 14:21:35,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:35,124 INFO L93 Difference]: Finished difference Result 14013 states and 32193 transitions. [2021-01-26 14:21:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:21:35,125 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 [2021-01-26 14:21:35,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:35,143 INFO L225 Difference]: With dead ends: 14013 [2021-01-26 14:21:35,144 INFO L226 Difference]: Without dead ends: 13709 [2021-01-26 14:21:35,144 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2021-01-26 14:21:35,144 INFO L78 Accepts]: Start accepts. Automaton has 13709 states. Word has length 53 [2021-01-26 14:21:35,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:35,144 INFO L481 AbstractCegarLoop]: Abstraction has 13709 states. [2021-01-26 14:21:35,144 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) [2021-01-26 14:21:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 13709 states. [2021-01-26 14:21:35,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:21:35,155 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:35,155 INFO L504 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] [2021-01-26 14:21:35,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-26 14:21:35,356 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:35,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:35,357 INFO L82 PathProgramCache]: Analyzing trace with hash 271823718, now seen corresponding path program 12 times [2021-01-26 14:21:35,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:35,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297719890] [2021-01-26 14:21:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:35,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297719890] [2021-01-26 14:21:35,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126261941] [2021-01-26 14:21:35,511 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 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 [2021-01-26 14:21:35,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:21:35,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:35,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:21:35,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:35,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:35,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:35,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:21:35,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813495251] [2021-01-26 14:21:35,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:21:35,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:35,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:21:35,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:21:35,792 INFO L87 Difference]: Start difference. First operand 13709 states. 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) [2021-01-26 14:21:36,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:36,565 INFO L93 Difference]: Finished difference Result 13941 states and 31985 transitions. [2021-01-26 14:21:36,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-26 14:21:36,565 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 [2021-01-26 14:21:36,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:36,581 INFO L225 Difference]: With dead ends: 13941 [2021-01-26 14:21:36,582 INFO L226 Difference]: Without dead ends: 13789 [2021-01-26 14:21:36,582 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:21:36,582 INFO L78 Accepts]: Start accepts. Automaton has 13789 states. Word has length 53 [2021-01-26 14:21:36,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:36,582 INFO L481 AbstractCegarLoop]: Abstraction has 13789 states. [2021-01-26 14:21:36,583 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) [2021-01-26 14:21:36,583 INFO L276 IsEmpty]: Start isEmpty. Operand 13789 states. [2021-01-26 14:21:36,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:21:36,593 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:36,594 INFO L504 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] [2021-01-26 14:21:36,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:36,794 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:36,795 INFO L82 PathProgramCache]: Analyzing trace with hash -126292160, now seen corresponding path program 13 times [2021-01-26 14:21:36,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:36,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154282828] [2021-01-26 14:21:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:36,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154282828] [2021-01-26 14:21:36,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451227115] [2021-01-26 14:21:36,973 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 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 [2021-01-26 14:21:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:37,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:21:37,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:37,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:37,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:37,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:21:37,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525980677] [2021-01-26 14:21:37,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:21:37,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:37,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:21:37,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:21:37,276 INFO L87 Difference]: Start difference. First operand 13789 states. 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) [2021-01-26 14:21:37,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:37,876 INFO L93 Difference]: Finished difference Result 14021 states and 32145 transitions. [2021-01-26 14:21:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-26 14:21:37,877 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 [2021-01-26 14:21:37,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:37,894 INFO L225 Difference]: With dead ends: 14021 [2021-01-26 14:21:37,895 INFO L226 Difference]: Without dead ends: 13869 [2021-01-26 14:21:37,895 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2021-01-26 14:21:37,895 INFO L78 Accepts]: Start accepts. Automaton has 13869 states. Word has length 53 [2021-01-26 14:21:37,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:37,896 INFO L481 AbstractCegarLoop]: Abstraction has 13869 states. [2021-01-26 14:21:37,896 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) [2021-01-26 14:21:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 13869 states. [2021-01-26 14:21:37,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:21:37,907 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:37,907 INFO L504 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] [2021-01-26 14:21:38,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-26 14:21:38,108 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:38,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:38,109 INFO L82 PathProgramCache]: Analyzing trace with hash 272515748, now seen corresponding path program 15 times [2021-01-26 14:21:38,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:38,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551693771] [2021-01-26 14:21:38,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:38,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551693771] [2021-01-26 14:21:38,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093881131] [2021-01-26 14:21:38,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:38,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-26 14:21:38,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:38,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:21:38,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:38,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:38,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:38,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:21:38,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126208393] [2021-01-26 14:21:38,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:21:38,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:38,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:21:38,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:21:38,579 INFO L87 Difference]: Start difference. First operand 13869 states. 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) [2021-01-26 14:21:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:39,086 INFO L93 Difference]: Finished difference Result 14186 states and 32475 transitions. [2021-01-26 14:21:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-26 14:21:39,087 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 [2021-01-26 14:21:39,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:39,104 INFO L225 Difference]: With dead ends: 14186 [2021-01-26 14:21:39,104 INFO L226 Difference]: Without dead ends: 14034 [2021-01-26 14:21:39,104 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-01-26 14:21:39,104 INFO L78 Accepts]: Start accepts. Automaton has 14034 states. Word has length 53 [2021-01-26 14:21:39,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:39,105 INFO L481 AbstractCegarLoop]: Abstraction has 14034 states. [2021-01-26 14:21:39,105 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) [2021-01-26 14:21:39,105 INFO L276 IsEmpty]: Start isEmpty. Operand 14034 states. [2021-01-26 14:21:39,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:21:39,116 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:39,116 INFO L504 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] [2021-01-26 14:21:39,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-26 14:21:39,317 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:39,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:39,318 INFO L82 PathProgramCache]: Analyzing trace with hash 648668216, now seen corresponding path program 16 times [2021-01-26 14:21:39,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:39,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610787318] [2021-01-26 14:21:39,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:39,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610787318] [2021-01-26 14:21:39,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275827323] [2021-01-26 14:21:39,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:39,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:21:39,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:39,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:21:39,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:39,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:39,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:39,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:21:39,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659502641] [2021-01-26 14:21:39,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:21:39,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:39,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:21:39,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:21:39,782 INFO L87 Difference]: Start difference. First operand 14034 states. 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) [2021-01-26 14:21:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:40,452 INFO L93 Difference]: Finished difference Result 14418 states and 33003 transitions. [2021-01-26 14:21:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-26 14:21:40,453 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 [2021-01-26 14:21:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:40,472 INFO L225 Difference]: With dead ends: 14418 [2021-01-26 14:21:40,473 INFO L226 Difference]: Without dead ends: 14114 [2021-01-26 14:21:40,473 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=698, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:21:40,473 INFO L78 Accepts]: Start accepts. Automaton has 14114 states. Word has length 53 [2021-01-26 14:21:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:40,473 INFO L481 AbstractCegarLoop]: Abstraction has 14114 states. [2021-01-26 14:21:40,474 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) [2021-01-26 14:21:40,474 INFO L276 IsEmpty]: Start isEmpty. Operand 14114 states. [2021-01-26 14:21:40,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:21:40,489 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:40,489 INFO L504 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] [2021-01-26 14:21:40,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-26 14:21:40,697 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:40,697 INFO L82 PathProgramCache]: Analyzing trace with hash -156852450, now seen corresponding path program 17 times [2021-01-26 14:21:40,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:40,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209608012] [2021-01-26 14:21:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:40,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209608012] [2021-01-26 14:21:40,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578711238] [2021-01-26 14:21:40,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:40,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:21:40,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:40,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:21:40,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:41,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:41,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:41,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:21:41,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893828756] [2021-01-26 14:21:41,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:21:41,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:41,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:21:41,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:21:41,234 INFO L87 Difference]: Start difference. First operand 14114 states. 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) [2021-01-26 14:21:41,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:41,727 INFO L93 Difference]: Finished difference Result 14346 states and 32795 transitions. [2021-01-26 14:21:41,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-26 14:21:41,728 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 [2021-01-26 14:21:41,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:41,746 INFO L225 Difference]: With dead ends: 14346 [2021-01-26 14:21:41,746 INFO L226 Difference]: Without dead ends: 14194 [2021-01-26 14:21:41,746 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-01-26 14:21:41,746 INFO L78 Accepts]: Start accepts. Automaton has 14194 states. Word has length 53 [2021-01-26 14:21:41,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:41,747 INFO L481 AbstractCegarLoop]: Abstraction has 14194 states. [2021-01-26 14:21:41,747 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) [2021-01-26 14:21:41,747 INFO L276 IsEmpty]: Start isEmpty. Operand 14194 states. [2021-01-26 14:21:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:21:41,759 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:41,759 INFO L504 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] [2021-01-26 14:21:41,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-26 14:21:41,960 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:41,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:41,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1455561348, now seen corresponding path program 18 times [2021-01-26 14:21:41,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:41,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238882010] [2021-01-26 14:21:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:42,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238882010] [2021-01-26 14:21:42,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941974177] [2021-01-26 14:21:42,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:42,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:21:42,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:42,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:21:42,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:42,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:21:43,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:43,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:43,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:21:43,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913190433] [2021-01-26 14:21:43,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:21:43,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:43,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:21:43,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=249, Unknown=1, NotChecked=0, Total=342 [2021-01-26 14:21:43,880 INFO L87 Difference]: Start difference. First operand 14194 states. 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) [2021-01-26 14:21:48,419 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-01-26 14:22:49,851 WARN L193 SmtUtils]: Spent 3.78 s on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-01-26 14:23:45,368 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-01-26 14:25:31,845 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 22 [2021-01-26 14:26:22,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:22,430 INFO L93 Difference]: Finished difference Result 16394 states and 37690 transitions. [2021-01-26 14:26:22,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-26 14:26:22,457 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 [2021-01-26 14:26:22,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:22,480 INFO L225 Difference]: With dead ends: 16394 [2021-01-26 14:26:22,480 INFO L226 Difference]: Without dead ends: 15684 [2021-01-26 14:26:22,481 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 47.6s TimeCoverageRelationStatistics Valid=450, Invalid=1512, Unknown=18, NotChecked=0, Total=1980 [2021-01-26 14:26:22,481 INFO L78 Accepts]: Start accepts. Automaton has 15684 states. Word has length 53 [2021-01-26 14:26:22,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:22,482 INFO L481 AbstractCegarLoop]: Abstraction has 15684 states. [2021-01-26 14:26:22,482 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) [2021-01-26 14:26:22,482 INFO L276 IsEmpty]: Start isEmpty. Operand 15684 states. [2021-01-26 14:26:22,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:26:22,497 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:22,498 INFO L504 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] [2021-01-26 14:26:22,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:22,699 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:22,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:22,700 INFO L82 PathProgramCache]: Analyzing trace with hash 201940260, now seen corresponding path program 19 times [2021-01-26 14:26:22,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:22,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957341493] [2021-01-26 14:26:22,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:22,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957341493] [2021-01-26 14:26:22,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167750328] [2021-01-26 14:26:22,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:23,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:26:23,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:23,378 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:23,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:23,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:26:23,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561065309] [2021-01-26 14:26:23,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:26:23,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:23,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:26:23,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:26:23,395 INFO L87 Difference]: Start difference. First operand 15684 states. 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) [2021-01-26 14:26:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:24,665 INFO L93 Difference]: Finished difference Result 16241 states and 36965 transitions. [2021-01-26 14:26:24,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:26:24,666 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 [2021-01-26 14:26:24,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:24,694 INFO L225 Difference]: With dead ends: 16241 [2021-01-26 14:26:24,694 INFO L226 Difference]: Without dead ends: 16089 [2021-01-26 14:26:24,695 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=297, Invalid=825, Unknown=0, NotChecked=0, Total=1122 [2021-01-26 14:26:24,695 INFO L78 Accepts]: Start accepts. Automaton has 16089 states. Word has length 53 [2021-01-26 14:26:24,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:24,695 INFO L481 AbstractCegarLoop]: Abstraction has 16089 states. [2021-01-26 14:26:24,696 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) [2021-01-26 14:26:24,696 INFO L276 IsEmpty]: Start isEmpty. Operand 16089 states. [2021-01-26 14:26:24,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:26:24,711 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:24,712 INFO L504 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] [2021-01-26 14:26:24,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-26 14:26:24,913 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:24,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:24,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1615230568, now seen corresponding path program 20 times [2021-01-26 14:26:24,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:24,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951926558] [2021-01-26 14:26:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:25,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951926558] [2021-01-26 14:26:25,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296520666] [2021-01-26 14:26:25,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:25,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:26:25,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:25,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:26:25,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:25,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:26:25,680 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:25,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:25,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:26:25,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457927735] [2021-01-26 14:26:25,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:26:25,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:25,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:26:25,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:26:25,696 INFO L87 Difference]: Start difference. First operand 16089 states. 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) [2021-01-26 14:26:27,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:27,697 INFO L93 Difference]: Finished difference Result 18627 states and 42503 transitions. [2021-01-26 14:26:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-26 14:26:27,699 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 [2021-01-26 14:26:27,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:27,730 INFO L225 Difference]: With dead ends: 18627 [2021-01-26 14:26:27,730 INFO L226 Difference]: Without dead ends: 18093 [2021-01-26 14:26:27,731 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=503, Invalid=1567, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:26:27,732 INFO L78 Accepts]: Start accepts. Automaton has 18093 states. Word has length 53 [2021-01-26 14:26:27,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:27,732 INFO L481 AbstractCegarLoop]: Abstraction has 18093 states. [2021-01-26 14:26:27,732 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) [2021-01-26 14:26:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 18093 states. [2021-01-26 14:26:27,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:26:27,749 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:27,749 INFO L504 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] [2021-01-26 14:26:27,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-26 14:26:27,951 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:27,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:27,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1088090960, now seen corresponding path program 14 times [2021-01-26 14:26:27,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:27,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978623097] [2021-01-26 14:26:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:28,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978623097] [2021-01-26 14:26:28,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053597505] [2021-01-26 14:26:28,196 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 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 [2021-01-26 14:26:28,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:26:28,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:28,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:26:28,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:28,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:28,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:28,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:26:28,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391725189] [2021-01-26 14:26:28,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:26:28,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:28,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:26:28,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:26:28,599 INFO L87 Difference]: Start difference. First operand 18093 states. 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) [2021-01-26 14:26:30,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:30,054 INFO L93 Difference]: Finished difference Result 18365 states and 41688 transitions. [2021-01-26 14:26:30,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-26 14:26:30,056 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 [2021-01-26 14:26:30,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:30,101 INFO L225 Difference]: With dead ends: 18365 [2021-01-26 14:26:30,101 INFO L226 Difference]: Without dead ends: 18213 [2021-01-26 14:26:30,102 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2021-01-26 14:26:30,103 INFO L78 Accepts]: Start accepts. Automaton has 18213 states. Word has length 53 [2021-01-26 14:26:30,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:30,103 INFO L481 AbstractCegarLoop]: Abstraction has 18213 states. [2021-01-26 14:26:30,103 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) [2021-01-26 14:26:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand 18213 states. [2021-01-26 14:26:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:26:30,126 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:30,126 INFO L504 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] [2021-01-26 14:26:30,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:30,340 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:30,340 INFO L82 PathProgramCache]: Analyzing trace with hash 325199348, now seen corresponding path program 15 times [2021-01-26 14:26:30,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:30,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207658451] [2021-01-26 14:26:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:30,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207658451] [2021-01-26 14:26:30,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308951077] [2021-01-26 14:26:30,860 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 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 [2021-01-26 14:26:30,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:26:30,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:30,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:26:30,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:31,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:26:31,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:31,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:31,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:26:31,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852000190] [2021-01-26 14:26:31,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:26:31,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:31,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:26:31,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:26:31,226 INFO L87 Difference]: Start difference. First operand 18213 states. 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) [2021-01-26 14:26:33,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:33,877 INFO L93 Difference]: Finished difference Result 20642 states and 46849 transitions. [2021-01-26 14:26:33,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-26 14:26:33,879 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 [2021-01-26 14:26:33,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:33,914 INFO L225 Difference]: With dead ends: 20642 [2021-01-26 14:26:33,915 INFO L226 Difference]: Without dead ends: 20102 [2021-01-26 14:26:33,916 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=681, Invalid=2399, Unknown=0, NotChecked=0, Total=3080 [2021-01-26 14:26:33,916 INFO L78 Accepts]: Start accepts. Automaton has 20102 states. Word has length 53 [2021-01-26 14:26:33,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:33,916 INFO L481 AbstractCegarLoop]: Abstraction has 20102 states. [2021-01-26 14:26:33,916 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) [2021-01-26 14:26:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 20102 states. [2021-01-26 14:26:33,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:26:33,932 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:33,932 INFO L504 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] [2021-01-26 14:26:34,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-26 14:26:34,133 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:34,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:34,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1407530148, now seen corresponding path program 16 times [2021-01-26 14:26:34,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:34,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119847309] [2021-01-26 14:26:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:34,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119847309] [2021-01-26 14:26:34,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395048851] [2021-01-26 14:26:34,382 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 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 [2021-01-26 14:26:34,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:26:34,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:34,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:26:34,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:34,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:34,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:34,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:26:34,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83725314] [2021-01-26 14:26:34,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:26:34,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:34,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:26:34,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:26:34,875 INFO L87 Difference]: Start difference. First operand 20102 states. 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) [2021-01-26 14:26:36,535 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-01-26 14:26:36,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:36,629 INFO L93 Difference]: Finished difference Result 20802 states and 46989 transitions. [2021-01-26 14:26:36,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-26 14:26:36,630 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 [2021-01-26 14:26:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:36,664 INFO L225 Difference]: With dead ends: 20802 [2021-01-26 14:26:36,665 INFO L226 Difference]: Without dead ends: 20650 [2021-01-26 14:26:36,665 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2021-01-26 14:26:36,666 INFO L78 Accepts]: Start accepts. Automaton has 20650 states. Word has length 53 [2021-01-26 14:26:36,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:36,666 INFO L481 AbstractCegarLoop]: Abstraction has 20650 states. [2021-01-26 14:26:36,666 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) [2021-01-26 14:26:36,666 INFO L276 IsEmpty]: Start isEmpty. Operand 20650 states. [2021-01-26 14:26:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:26:36,682 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:36,682 INFO L504 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] [2021-01-26 14:26:36,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:36,883 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:36,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1474146840, now seen corresponding path program 17 times [2021-01-26 14:26:36,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:36,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958086774] [2021-01-26 14:26:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:37,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958086774] [2021-01-26 14:26:37,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582248506] [2021-01-26 14:26:37,192 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 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 [2021-01-26 14:26:37,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:26:37,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:37,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:26:37,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:37,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:26:37,599 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:37,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:37,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:26:37,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492385329] [2021-01-26 14:26:37,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:26:37,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:37,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:26:37,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:26:37,656 INFO L87 Difference]: Start difference. First operand 20650 states. 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) [2021-01-26 14:26:40,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:40,786 INFO L93 Difference]: Finished difference Result 23658 states and 53689 transitions. [2021-01-26 14:26:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-26 14:26:40,788 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 [2021-01-26 14:26:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:40,836 INFO L225 Difference]: With dead ends: 23658 [2021-01-26 14:26:40,837 INFO L226 Difference]: Without dead ends: 23070 [2021-01-26 14:26:40,840 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=739, Invalid=2683, Unknown=0, NotChecked=0, Total=3422 [2021-01-26 14:26:40,840 INFO L78 Accepts]: Start accepts. Automaton has 23070 states. Word has length 53 [2021-01-26 14:26:40,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:40,843 INFO L481 AbstractCegarLoop]: Abstraction has 23070 states. [2021-01-26 14:26:40,843 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) [2021-01-26 14:26:40,843 INFO L276 IsEmpty]: Start isEmpty. Operand 23070 states. [2021-01-26 14:26:40,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:26:40,866 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:40,866 INFO L504 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] [2021-01-26 14:26:41,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-26 14:26:41,081 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:41,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:41,082 INFO L82 PathProgramCache]: Analyzing trace with hash 973842700, now seen corresponding path program 18 times [2021-01-26 14:26:41,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:41,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549772782] [2021-01-26 14:26:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:41,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549772782] [2021-01-26 14:26:41,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536021566] [2021-01-26 14:26:41,481 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 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 [2021-01-26 14:26:41,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:26:41,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:41,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:26:41,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:41,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:41,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:41,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:26:41,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046986581] [2021-01-26 14:26:41,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:26:41,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:41,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:26:41,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:26:41,928 INFO L87 Difference]: Start difference. First operand 23070 states. 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) [2021-01-26 14:26:43,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:43,636 INFO L93 Difference]: Finished difference Result 23822 states and 53647 transitions. [2021-01-26 14:26:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-26 14:26:43,638 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 [2021-01-26 14:26:43,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:43,697 INFO L225 Difference]: With dead ends: 23822 [2021-01-26 14:26:43,697 INFO L226 Difference]: Without dead ends: 23670 [2021-01-26 14:26:43,701 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2021-01-26 14:26:43,702 INFO L78 Accepts]: Start accepts. Automaton has 23670 states. Word has length 53 [2021-01-26 14:26:43,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:43,702 INFO L481 AbstractCegarLoop]: Abstraction has 23670 states. [2021-01-26 14:26:43,702 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) [2021-01-26 14:26:43,702 INFO L276 IsEmpty]: Start isEmpty. Operand 23670 states. [2021-01-26 14:26:43,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:26:43,731 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:43,732 INFO L504 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] [2021-01-26 14:26:43,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-26 14:26:43,946 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:43,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:43,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1593635218, now seen corresponding path program 19 times [2021-01-26 14:26:43,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:43,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988078320] [2021-01-26 14:26:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:44,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988078320] [2021-01-26 14:26:44,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902511665] [2021-01-26 14:26:44,255 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 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 [2021-01-26 14:26:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:44,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:26:44,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:44,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:44,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:44,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:26:44,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551790927] [2021-01-26 14:26:44,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:26:44,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:44,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:26:44,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:26:44,777 INFO L87 Difference]: Start difference. First operand 23670 states. 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) [2021-01-26 14:26:46,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:46,952 INFO L93 Difference]: Finished difference Result 24052 states and 54202 transitions. [2021-01-26 14:26:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-26 14:26:46,953 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 [2021-01-26 14:26:46,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:46,992 INFO L225 Difference]: With dead ends: 24052 [2021-01-26 14:26:46,992 INFO L226 Difference]: Without dead ends: 23900 [2021-01-26 14:26:46,993 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-01-26 14:26:46,993 INFO L78 Accepts]: Start accepts. Automaton has 23900 states. Word has length 53 [2021-01-26 14:26:46,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:46,994 INFO L481 AbstractCegarLoop]: Abstraction has 23900 states. [2021-01-26 14:26:46,994 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) [2021-01-26 14:26:46,994 INFO L276 IsEmpty]: Start isEmpty. Operand 23900 states. [2021-01-26 14:26:47,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:26:47,012 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:47,012 INFO L504 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] [2021-01-26 14:26:47,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-26 14:26:47,213 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:47,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:47,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1288041770, now seen corresponding path program 20 times [2021-01-26 14:26:47,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:47,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206435845] [2021-01-26 14:26:47,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:47,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206435845] [2021-01-26 14:26:47,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891342099] [2021-01-26 14:26:47,518 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 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 [2021-01-26 14:26:47,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:26:47,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:47,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:26:47,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:47,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:26:48,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:48,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:48,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-26 14:26:48,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448604904] [2021-01-26 14:26:48,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:26:48,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:48,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:26:48,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:26:48,187 INFO L87 Difference]: Start difference. First operand 23900 states. 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) [2021-01-26 14:26:50,633 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-01-26 14:26:52,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:52,974 INFO L93 Difference]: Finished difference Result 27531 states and 62116 transitions. [2021-01-26 14:26:52,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-26 14:26:52,976 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 [2021-01-26 14:26:52,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:53,026 INFO L225 Difference]: With dead ends: 27531 [2021-01-26 14:26:53,026 INFO L226 Difference]: Without dead ends: 26839 [2021-01-26 14:26:53,027 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=864, Invalid=3168, Unknown=0, NotChecked=0, Total=4032 [2021-01-26 14:26:53,027 INFO L78 Accepts]: Start accepts. Automaton has 26839 states. Word has length 53 [2021-01-26 14:26:53,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:53,027 INFO L481 AbstractCegarLoop]: Abstraction has 26839 states. [2021-01-26 14:26:53,028 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) [2021-01-26 14:26:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 26839 states. [2021-01-26 14:26:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:26:53,055 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:53,055 INFO L504 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] [2021-01-26 14:26:53,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-01-26 14:26:53,257 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:53,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:53,257 INFO L82 PathProgramCache]: Analyzing trace with hash 948308753, now seen corresponding path program 21 times [2021-01-26 14:26:53,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:53,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269598051] [2021-01-26 14:26:53,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:53,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269598051] [2021-01-26 14:26:53,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533305489] [2021-01-26 14:26:53,625 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 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 [2021-01-26 14:26:53,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-26 14:26:53,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:53,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:26:53,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:54,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:54,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:54,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:54,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:54,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:26:54,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530122006] [2021-01-26 14:26:54,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:26:54,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:54,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:26:54,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:26:54,361 INFO L87 Difference]: Start difference. First operand 26839 states. 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) [2021-01-26 14:26:55,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:55,584 INFO L93 Difference]: Finished difference Result 27151 states and 60970 transitions. [2021-01-26 14:26:55,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-26 14:26:55,586 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 [2021-01-26 14:26:55,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:55,656 INFO L225 Difference]: With dead ends: 27151 [2021-01-26 14:26:55,656 INFO L226 Difference]: Without dead ends: 26999 [2021-01-26 14:26:55,657 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=263, Invalid=667, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:26:55,657 INFO L78 Accepts]: Start accepts. Automaton has 26999 states. Word has length 58 [2021-01-26 14:26:55,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:55,657 INFO L481 AbstractCegarLoop]: Abstraction has 26999 states. [2021-01-26 14:26:55,657 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) [2021-01-26 14:26:55,657 INFO L276 IsEmpty]: Start isEmpty. Operand 26999 states. [2021-01-26 14:26:55,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:26:55,784 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:55,785 INFO L504 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] [2021-01-26 14:26:55,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:55,997 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:55,998 INFO L82 PathProgramCache]: Analyzing trace with hash -661958873, now seen corresponding path program 22 times [2021-01-26 14:26:55,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:55,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740990876] [2021-01-26 14:26:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:56,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740990876] [2021-01-26 14:26:56,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44390357] [2021-01-26 14:26:56,417 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 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 [2021-01-26 14:26:56,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:26:56,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:56,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:26:56,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:57,037 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:57,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:57,056 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:57,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:57,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:26:57,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760496202] [2021-01-26 14:26:57,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:26:57,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:57,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:26:57,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:26:57,159 INFO L87 Difference]: Start difference. First operand 26999 states. 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) [2021-01-26 14:26:58,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:58,348 INFO L93 Difference]: Finished difference Result 27351 states and 61370 transitions. [2021-01-26 14:26:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:26:58,349 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 [2021-01-26 14:26:58,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:58,385 INFO L225 Difference]: With dead ends: 27351 [2021-01-26 14:26:58,385 INFO L226 Difference]: Without dead ends: 27199 [2021-01-26 14:26:58,385 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2021-01-26 14:26:58,385 INFO L78 Accepts]: Start accepts. Automaton has 27199 states. Word has length 58 [2021-01-26 14:26:58,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:58,385 INFO L481 AbstractCegarLoop]: Abstraction has 27199 states. [2021-01-26 14:26:58,386 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) [2021-01-26 14:26:58,386 INFO L276 IsEmpty]: Start isEmpty. Operand 27199 states. [2021-01-26 14:26:58,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:26:58,407 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:58,407 INFO L504 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] [2021-01-26 14:26:58,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-26 14:26:58,608 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:58,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:58,609 INFO L82 PathProgramCache]: Analyzing trace with hash 804018355, now seen corresponding path program 23 times [2021-01-26 14:26:58,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:58,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013727088] [2021-01-26 14:26:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:58,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013727088] [2021-01-26 14:26:58,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441843504] [2021-01-26 14:26:58,917 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 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 [2021-01-26 14:26:58,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:26:58,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:58,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:26:58,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:59,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:59,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:59,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:26:59,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166758787] [2021-01-26 14:26:59,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:26:59,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:59,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:26:59,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:26:59,398 INFO L87 Difference]: Start difference. First operand 27199 states. 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) [2021-01-26 14:27:00,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:00,725 INFO L93 Difference]: Finished difference Result 27551 states and 61770 transitions. [2021-01-26 14:27:00,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-26 14:27:00,726 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 [2021-01-26 14:27:00,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:00,807 INFO L225 Difference]: With dead ends: 27551 [2021-01-26 14:27:00,807 INFO L226 Difference]: Without dead ends: 27399 [2021-01-26 14:27:00,808 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2021-01-26 14:27:00,808 INFO L78 Accepts]: Start accepts. Automaton has 27399 states. Word has length 58 [2021-01-26 14:27:00,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:00,809 INFO L481 AbstractCegarLoop]: Abstraction has 27399 states. [2021-01-26 14:27:00,809 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) [2021-01-26 14:27:00,809 INFO L276 IsEmpty]: Start isEmpty. Operand 27399 states. [2021-01-26 14:27:00,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:00,862 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:00,862 INFO L504 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] [2021-01-26 14:27:01,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:01,076 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:01,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:01,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1502758405, now seen corresponding path program 24 times [2021-01-26 14:27:01,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:01,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803816746] [2021-01-26 14:27:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:01,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803816746] [2021-01-26 14:27:01,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625562377] [2021-01-26 14:27:01,639 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 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 [2021-01-26 14:27:01,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:27:01,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:01,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:02,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:02,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:02,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:02,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504174966] [2021-01-26 14:27:02,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:02,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:02,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:02,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:02,340 INFO L87 Difference]: Start difference. First operand 27399 states. 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) [2021-01-26 14:27:03,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:03,909 INFO L93 Difference]: Finished difference Result 27991 states and 62778 transitions. [2021-01-26 14:27:03,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-26 14:27:03,911 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 [2021-01-26 14:27:03,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:03,966 INFO L225 Difference]: With dead ends: 27991 [2021-01-26 14:27:03,967 INFO L226 Difference]: Without dead ends: 27599 [2021-01-26 14:27:03,967 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=377, Invalid=1183, Unknown=0, NotChecked=0, Total=1560 [2021-01-26 14:27:03,967 INFO L78 Accepts]: Start accepts. Automaton has 27599 states. Word has length 58 [2021-01-26 14:27:03,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:03,968 INFO L481 AbstractCegarLoop]: Abstraction has 27599 states. [2021-01-26 14:27:03,968 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) [2021-01-26 14:27:03,968 INFO L276 IsEmpty]: Start isEmpty. Operand 27599 states. [2021-01-26 14:27:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:04,000 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:04,000 INFO L504 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] [2021-01-26 14:27:04,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-26 14:27:04,201 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:04,202 INFO L82 PathProgramCache]: Analyzing trace with hash 667451665, now seen corresponding path program 25 times [2021-01-26 14:27:04,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:04,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221364216] [2021-01-26 14:27:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:04,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221364216] [2021-01-26 14:27:04,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134725924] [2021-01-26 14:27:04,526 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 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 [2021-01-26 14:27:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:04,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:04,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:04,841 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 9 [2021-01-26 14:27:05,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:05,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:05,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:05,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:05,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:05,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566039252] [2021-01-26 14:27:05,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:05,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:05,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:05,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:05,314 INFO L87 Difference]: Start difference. First operand 27599 states. 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) [2021-01-26 14:27:06,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:06,910 INFO L93 Difference]: Finished difference Result 27831 states and 62330 transitions. [2021-01-26 14:27:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-26 14:27:06,912 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 [2021-01-26 14:27:06,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:06,984 INFO L225 Difference]: With dead ends: 27831 [2021-01-26 14:27:06,984 INFO L226 Difference]: Without dead ends: 27679 [2021-01-26 14:27:06,985 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2021-01-26 14:27:06,985 INFO L78 Accepts]: Start accepts. Automaton has 27679 states. Word has length 58 [2021-01-26 14:27:06,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:06,986 INFO L481 AbstractCegarLoop]: Abstraction has 27679 states. [2021-01-26 14:27:06,986 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) [2021-01-26 14:27:06,986 INFO L276 IsEmpty]: Start isEmpty. Operand 27679 states. [2021-01-26 14:27:07,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:07,025 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:07,025 INFO L504 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] [2021-01-26 14:27:07,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-26 14:27:07,239 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:07,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:07,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1750112601, now seen corresponding path program 26 times [2021-01-26 14:27:07,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:07,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302423006] [2021-01-26 14:27:07,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:07,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302423006] [2021-01-26 14:27:07,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058723007] [2021-01-26 14:27:07,816 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 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 [2021-01-26 14:27:07,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:27:07,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:07,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:08,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:08,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:08,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:08,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:08,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48235211] [2021-01-26 14:27:08,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:08,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:08,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:08,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:08,471 INFO L87 Difference]: Start difference. First operand 27679 states. 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) [2021-01-26 14:27:09,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:09,883 INFO L93 Difference]: Finished difference Result 27991 states and 62650 transitions. [2021-01-26 14:27:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:27:09,885 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 [2021-01-26 14:27:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:09,942 INFO L225 Difference]: With dead ends: 27991 [2021-01-26 14:27:09,943 INFO L226 Difference]: Without dead ends: 27839 [2021-01-26 14:27:09,943 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=365, Invalid=1041, Unknown=0, NotChecked=0, Total=1406 [2021-01-26 14:27:09,943 INFO L78 Accepts]: Start accepts. Automaton has 27839 states. Word has length 58 [2021-01-26 14:27:09,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:09,944 INFO L481 AbstractCegarLoop]: Abstraction has 27839 states. [2021-01-26 14:27:09,944 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) [2021-01-26 14:27:09,944 INFO L276 IsEmpty]: Start isEmpty. Operand 27839 states. [2021-01-26 14:27:09,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:09,978 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:09,978 INFO L504 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] [2021-01-26 14:27:10,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:10,179 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:10,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:10,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1051372551, now seen corresponding path program 27 times [2021-01-26 14:27:10,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:10,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222050280] [2021-01-26 14:27:10,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:10,743 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-01-26 14:27:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:11,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222050280] [2021-01-26 14:27:11,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610039976] [2021-01-26 14:27:11,042 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 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 [2021-01-26 14:27:11,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-26 14:27:11,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:11,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:11,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:11,760 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:11,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:11,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:11,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523540900] [2021-01-26 14:27:11,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:11,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:11,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:11,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:11,799 INFO L87 Difference]: Start difference. First operand 27839 states. 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) [2021-01-26 14:27:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:13,600 INFO L93 Difference]: Finished difference Result 28071 states and 62810 transitions. [2021-01-26 14:27:13,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-26 14:27:13,603 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 [2021-01-26 14:27:13,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:13,675 INFO L225 Difference]: With dead ends: 28071 [2021-01-26 14:27:13,676 INFO L226 Difference]: Without dead ends: 27919 [2021-01-26 14:27:13,677 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=432, Invalid=1208, Unknown=0, NotChecked=0, Total=1640 [2021-01-26 14:27:13,677 INFO L78 Accepts]: Start accepts. Automaton has 27919 states. Word has length 58 [2021-01-26 14:27:13,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:13,677 INFO L481 AbstractCegarLoop]: Abstraction has 27919 states. [2021-01-26 14:27:13,678 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) [2021-01-26 14:27:13,678 INFO L276 IsEmpty]: Start isEmpty. Operand 27919 states. [2021-01-26 14:27:13,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:13,721 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:13,721 INFO L504 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] [2021-01-26 14:27:13,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-26 14:27:13,922 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:13,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:13,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1946130335, now seen corresponding path program 21 times [2021-01-26 14:27:13,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:13,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756916888] [2021-01-26 14:27:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:14,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756916888] [2021-01-26 14:27:14,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028404178] [2021-01-26 14:27:14,470 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 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 [2021-01-26 14:27:14,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-26 14:27:14,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:14,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:14,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:14,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:15,015 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:15,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:15,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:15,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695467408] [2021-01-26 14:27:15,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:15,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:15,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:15,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:15,018 INFO L87 Difference]: Start difference. First operand 27919 states. 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) [2021-01-26 14:27:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:16,690 INFO L93 Difference]: Finished difference Result 28471 states and 63738 transitions. [2021-01-26 14:27:16,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-26 14:27:16,692 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 [2021-01-26 14:27:16,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:16,764 INFO L225 Difference]: With dead ends: 28471 [2021-01-26 14:27:16,765 INFO L226 Difference]: Without dead ends: 28079 [2021-01-26 14:27:16,765 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-01-26 14:27:16,765 INFO L78 Accepts]: Start accepts. Automaton has 28079 states. Word has length 58 [2021-01-26 14:27:16,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:16,766 INFO L481 AbstractCegarLoop]: Abstraction has 28079 states. [2021-01-26 14:27:16,766 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) [2021-01-26 14:27:16,766 INFO L276 IsEmpty]: Start isEmpty. Operand 28079 states. [2021-01-26 14:27:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:16,806 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:16,806 INFO L504 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] [2021-01-26 14:27:17,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-26 14:27:17,007 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:17,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:17,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2001000967, now seen corresponding path program 28 times [2021-01-26 14:27:17,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:17,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086947421] [2021-01-26 14:27:17,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:17,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086947421] [2021-01-26 14:27:17,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452842510] [2021-01-26 14:27:17,431 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 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 [2021-01-26 14:27:17,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:27:17,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:17,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:17,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:18,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:18,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:18,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:18,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:18,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:18,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541264869] [2021-01-26 14:27:18,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:18,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:18,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:18,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:18,179 INFO L87 Difference]: Start difference. First operand 28079 states. 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) [2021-01-26 14:27:19,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:19,899 INFO L93 Difference]: Finished difference Result 28311 states and 63290 transitions. [2021-01-26 14:27:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:27:19,900 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 [2021-01-26 14:27:19,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:19,953 INFO L225 Difference]: With dead ends: 28311 [2021-01-26 14:27:19,953 INFO L226 Difference]: Without dead ends: 28159 [2021-01-26 14:27:19,954 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=342, Invalid=990, Unknown=0, NotChecked=0, Total=1332 [2021-01-26 14:27:19,954 INFO L78 Accepts]: Start accepts. Automaton has 28159 states. Word has length 58 [2021-01-26 14:27:19,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:19,954 INFO L481 AbstractCegarLoop]: Abstraction has 28159 states. [2021-01-26 14:27:19,955 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) [2021-01-26 14:27:19,955 INFO L276 IsEmpty]: Start isEmpty. Operand 28159 states. [2021-01-26 14:27:19,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:19,992 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:19,993 INFO L504 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] [2021-01-26 14:27:20,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-26 14:27:20,193 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:20,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:20,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1916523223, now seen corresponding path program 29 times [2021-01-26 14:27:20,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:20,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713383518] [2021-01-26 14:27:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:20,481 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-01-26 14:27:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:20,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713383518] [2021-01-26 14:27:20,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525989878] [2021-01-26 14:27:20,730 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 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 [2021-01-26 14:27:20,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:27:20,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:20,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:20,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:21,431 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:21,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:21,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:21,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:21,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:21,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598362582] [2021-01-26 14:27:21,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:21,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:21,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:21,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:21,572 INFO L87 Difference]: Start difference. First operand 28159 states. 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) [2021-01-26 14:27:22,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:22,750 INFO L93 Difference]: Finished difference Result 28471 states and 63610 transitions. [2021-01-26 14:27:22,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-26 14:27:22,751 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 [2021-01-26 14:27:22,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:22,802 INFO L225 Difference]: With dead ends: 28471 [2021-01-26 14:27:22,802 INFO L226 Difference]: Without dead ends: 28319 [2021-01-26 14:27:22,803 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:27:22,803 INFO L78 Accepts]: Start accepts. Automaton has 28319 states. Word has length 58 [2021-01-26 14:27:22,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:22,803 INFO L481 AbstractCegarLoop]: Abstraction has 28319 states. [2021-01-26 14:27:22,803 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) [2021-01-26 14:27:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 28319 states. [2021-01-26 14:27:22,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:22,834 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:22,834 INFO L504 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] [2021-01-26 14:27:23,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:23,035 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:23,036 INFO L82 PathProgramCache]: Analyzing trace with hash 306255597, now seen corresponding path program 30 times [2021-01-26 14:27:23,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:23,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459813773] [2021-01-26 14:27:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:23,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459813773] [2021-01-26 14:27:23,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250850200] [2021-01-26 14:27:23,375 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 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 [2021-01-26 14:27:23,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:27:23,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:23,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:23,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:23,886 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-01-26 14:27:24,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:24,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:24,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:24,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:24,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:24,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637520408] [2021-01-26 14:27:24,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:24,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:24,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:24,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:24,195 INFO L87 Difference]: Start difference. First operand 28319 states. 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) [2021-01-26 14:27:25,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:25,778 INFO L93 Difference]: Finished difference Result 28671 states and 64010 transitions. [2021-01-26 14:27:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-26 14:27:25,780 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 [2021-01-26 14:27:25,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:25,838 INFO L225 Difference]: With dead ends: 28671 [2021-01-26 14:27:25,838 INFO L226 Difference]: Without dead ends: 28519 [2021-01-26 14:27:25,839 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2021-01-26 14:27:25,839 INFO L78 Accepts]: Start accepts. Automaton has 28519 states. Word has length 58 [2021-01-26 14:27:25,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:25,839 INFO L481 AbstractCegarLoop]: Abstraction has 28519 states. [2021-01-26 14:27:25,839 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) [2021-01-26 14:27:25,839 INFO L276 IsEmpty]: Start isEmpty. Operand 28519 states. [2021-01-26 14:27:25,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:25,876 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:25,877 INFO L504 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] [2021-01-26 14:27:26,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:26,078 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:26,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:26,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1772232825, now seen corresponding path program 31 times [2021-01-26 14:27:26,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:26,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825812961] [2021-01-26 14:27:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:26,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825812961] [2021-01-26 14:27:26,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955592319] [2021-01-26 14:27:26,381 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 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 [2021-01-26 14:27:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:26,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:26,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:26,879 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:26,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:26,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:26,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571965997] [2021-01-26 14:27:26,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:26,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:26,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:26,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:26,939 INFO L87 Difference]: Start difference. First operand 28519 states. 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) [2021-01-26 14:27:27,531 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2021-01-26 14:27:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:28,741 INFO L93 Difference]: Finished difference Result 28871 states and 64410 transitions. [2021-01-26 14:27:28,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-26 14:27:28,742 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 [2021-01-26 14:27:28,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:28,801 INFO L225 Difference]: With dead ends: 28871 [2021-01-26 14:27:28,802 INFO L226 Difference]: Without dead ends: 28719 [2021-01-26 14:27:28,802 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=413, Invalid=1227, Unknown=0, NotChecked=0, Total=1640 [2021-01-26 14:27:28,803 INFO L78 Accepts]: Start accepts. Automaton has 28719 states. Word has length 58 [2021-01-26 14:27:28,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:28,803 INFO L481 AbstractCegarLoop]: Abstraction has 28719 states. [2021-01-26 14:27:28,803 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) [2021-01-26 14:27:28,803 INFO L276 IsEmpty]: Start isEmpty. Operand 28719 states. [2021-01-26 14:27:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:28,836 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:28,837 INFO L504 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] [2021-01-26 14:27:29,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:29,038 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:29,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1823994421, now seen corresponding path program 32 times [2021-01-26 14:27:29,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:29,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843222650] [2021-01-26 14:27:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:29,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843222650] [2021-01-26 14:27:29,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559588437] [2021-01-26 14:27:29,354 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 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 [2021-01-26 14:27:29,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:27:29,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:29,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:29,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:29,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:29,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:29,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:29,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299757680] [2021-01-26 14:27:29,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:29,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:29,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:29,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:29,917 INFO L87 Difference]: Start difference. First operand 28719 states. 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) [2021-01-26 14:27:31,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:31,773 INFO L93 Difference]: Finished difference Result 29311 states and 65418 transitions. [2021-01-26 14:27:31,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-26 14:27:31,775 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 [2021-01-26 14:27:31,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:31,833 INFO L225 Difference]: With dead ends: 29311 [2021-01-26 14:27:31,833 INFO L226 Difference]: Without dead ends: 28919 [2021-01-26 14:27:31,834 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:27:31,834 INFO L78 Accepts]: Start accepts. Automaton has 28919 states. Word has length 58 [2021-01-26 14:27:31,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:31,835 INFO L481 AbstractCegarLoop]: Abstraction has 28919 states. [2021-01-26 14:27:31,835 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) [2021-01-26 14:27:31,835 INFO L276 IsEmpty]: Start isEmpty. Operand 28919 states. [2021-01-26 14:27:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:31,868 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:31,869 INFO L504 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] [2021-01-26 14:27:32,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:32,070 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:32,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:32,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1635666135, now seen corresponding path program 33 times [2021-01-26 14:27:32,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:32,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735669732] [2021-01-26 14:27:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:32,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735669732] [2021-01-26 14:27:32,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368246146] [2021-01-26 14:27:32,443 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 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 [2021-01-26 14:27:32,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-26 14:27:32,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:32,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:32,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:33,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:33,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:33,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:33,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:33,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:33,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418668066] [2021-01-26 14:27:33,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:33,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:33,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:33,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:33,188 INFO L87 Difference]: Start difference. First operand 28919 states. 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) [2021-01-26 14:27:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:34,950 INFO L93 Difference]: Finished difference Result 29151 states and 64970 transitions. [2021-01-26 14:27:34,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-26 14:27:34,952 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 [2021-01-26 14:27:34,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:35,167 INFO L225 Difference]: With dead ends: 29151 [2021-01-26 14:27:35,167 INFO L226 Difference]: Without dead ends: 28999 [2021-01-26 14:27:35,168 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2021-01-26 14:27:35,168 INFO L78 Accepts]: Start accepts. Automaton has 28999 states. Word has length 58 [2021-01-26 14:27:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:35,168 INFO L481 AbstractCegarLoop]: Abstraction has 28999 states. [2021-01-26 14:27:35,169 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) [2021-01-26 14:27:35,169 INFO L276 IsEmpty]: Start isEmpty. Operand 28999 states. [2021-01-26 14:27:35,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:35,197 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:35,197 INFO L504 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] [2021-01-26 14:27:35,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-01-26 14:27:35,406 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:35,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:35,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1679925551, now seen corresponding path program 34 times [2021-01-26 14:27:35,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:35,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744432715] [2021-01-26 14:27:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:35,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744432715] [2021-01-26 14:27:35,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109487117] [2021-01-26 14:27:35,811 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 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 [2021-01-26 14:27:35,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:27:35,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:35,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:35,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:36,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:36,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:36,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:36,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:36,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:36,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541009425] [2021-01-26 14:27:36,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:36,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:36,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:36,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:36,521 INFO L87 Difference]: Start difference. First operand 28999 states. 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) [2021-01-26 14:27:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:37,731 INFO L93 Difference]: Finished difference Result 29431 states and 65530 transitions. [2021-01-26 14:27:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-26 14:27:37,733 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 [2021-01-26 14:27:37,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:37,793 INFO L225 Difference]: With dead ends: 29431 [2021-01-26 14:27:37,793 INFO L226 Difference]: Without dead ends: 29279 [2021-01-26 14:27:37,793 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2021-01-26 14:27:37,793 INFO L78 Accepts]: Start accepts. Automaton has 29279 states. Word has length 58 [2021-01-26 14:27:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:37,794 INFO L481 AbstractCegarLoop]: Abstraction has 29279 states. [2021-01-26 14:27:37,794 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) [2021-01-26 14:27:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 29279 states. [2021-01-26 14:27:37,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:37,824 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:37,824 INFO L504 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] [2021-01-26 14:27:38,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:38,025 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:38,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:38,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1004774119, now seen corresponding path program 35 times [2021-01-26 14:27:38,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:38,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684180130] [2021-01-26 14:27:38,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:38,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684180130] [2021-01-26 14:27:38,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581020415] [2021-01-26 14:27:38,289 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 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 [2021-01-26 14:27:38,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:27:38,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:38,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:38,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:38,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:38,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:38,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:39,019 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2021-01-26 14:27:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:39,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:39,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:39,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009670519] [2021-01-26 14:27:39,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:39,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:39,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:39,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:39,062 INFO L87 Difference]: Start difference. First operand 29279 states. 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) [2021-01-26 14:27:40,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:40,672 INFO L93 Difference]: Finished difference Result 29631 states and 65930 transitions. [2021-01-26 14:27:40,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-26 14:27:40,673 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 [2021-01-26 14:27:40,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:40,735 INFO L225 Difference]: With dead ends: 29631 [2021-01-26 14:27:40,735 INFO L226 Difference]: Without dead ends: 29479 [2021-01-26 14:27:40,735 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=349, Invalid=983, Unknown=0, NotChecked=0, Total=1332 [2021-01-26 14:27:40,736 INFO L78 Accepts]: Start accepts. Automaton has 29479 states. Word has length 58 [2021-01-26 14:27:40,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:40,736 INFO L481 AbstractCegarLoop]: Abstraction has 29479 states. [2021-01-26 14:27:40,736 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) [2021-01-26 14:27:40,736 INFO L276 IsEmpty]: Start isEmpty. Operand 29479 states. [2021-01-26 14:27:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:40,775 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:40,775 INFO L504 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] [2021-01-26 14:27:40,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-26 14:27:40,977 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:40,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:40,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1149157015, now seen corresponding path program 36 times [2021-01-26 14:27:40,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:40,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530710669] [2021-01-26 14:27:40,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:41,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530710669] [2021-01-26 14:27:41,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951684082] [2021-01-26 14:27:41,288 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 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 [2021-01-26 14:27:41,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:27:41,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:41,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:41,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:41,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:41,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:41,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:41,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:41,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:41,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514231373] [2021-01-26 14:27:41,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:41,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:41,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:41,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:27:41,897 INFO L87 Difference]: Start difference. First operand 29479 states. 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) [2021-01-26 14:27:43,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:43,352 INFO L93 Difference]: Finished difference Result 30031 states and 66730 transitions. [2021-01-26 14:27:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:27:43,354 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 [2021-01-26 14:27:43,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:43,404 INFO L225 Difference]: With dead ends: 30031 [2021-01-26 14:27:43,405 INFO L226 Difference]: Without dead ends: 29879 [2021-01-26 14:27:43,405 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2021-01-26 14:27:43,405 INFO L78 Accepts]: Start accepts. Automaton has 29879 states. Word has length 58 [2021-01-26 14:27:43,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:43,405 INFO L481 AbstractCegarLoop]: Abstraction has 29879 states. [2021-01-26 14:27:43,405 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) [2021-01-26 14:27:43,406 INFO L276 IsEmpty]: Start isEmpty. Operand 29879 states. [2021-01-26 14:27:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:27:43,430 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:43,431 INFO L504 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] [2021-01-26 14:27:43,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:43,645 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:43,645 INFO L82 PathProgramCache]: Analyzing trace with hash -563161397, now seen corresponding path program 37 times [2021-01-26 14:27:43,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:43,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526786581] [2021-01-26 14:27:43,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:43,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526786581] [2021-01-26 14:27:43,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277349263] [2021-01-26 14:27:43,964 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 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 [2021-01-26 14:27:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:44,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:27:44,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:44,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:27:48,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:48,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:27:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:48,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:48,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:27:48,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990457750] [2021-01-26 14:27:48,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:27:48,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:48,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:27:48,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=310, Unknown=2, NotChecked=0, Total=420 [2021-01-26 14:27:48,627 INFO L87 Difference]: Start difference. First operand 29879 states. 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) [2021-01-26 14:27:49,500 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 20 [2021-01-26 14:27:51,735 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 37 [2021-01-26 14:28:54,864 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 14 [2021-01-26 14:29:05,384 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-01-26 14:29:11,586 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-01-26 14:30:01,178 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 41 [2021-01-26 14:30:47,253 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2021-01-26 14:30:47,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:30:47,287 INFO L93 Difference]: Finished difference Result 32317 states and 72291 transitions. [2021-01-26 14:30:47,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-26 14:30:47,288 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 [2021-01-26 14:30:47,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:30:47,320 INFO L225 Difference]: With dead ends: 32317 [2021-01-26 14:30:47,321 INFO L226 Difference]: Without dead ends: 31840 [2021-01-26 14:30:47,321 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 52.6s TimeCoverageRelationStatistics Valid=595, Invalid=2041, Unknown=16, NotChecked=0, Total=2652 [2021-01-26 14:30:47,321 INFO L78 Accepts]: Start accepts. Automaton has 31840 states. Word has length 58 [2021-01-26 14:30:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:30:47,321 INFO L481 AbstractCegarLoop]: Abstraction has 31840 states. [2021-01-26 14:30:47,321 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) [2021-01-26 14:30:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 31840 states. [2021-01-26 14:30:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:30:47,340 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:30:47,340 INFO L504 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] [2021-01-26 14:30:47,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-26 14:30:47,541 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:30:47,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:30:47,542 INFO L82 PathProgramCache]: Analyzing trace with hash -355140559, now seen corresponding path program 38 times [2021-01-26 14:30:47,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:30:47,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408672615] [2021-01-26 14:30:47,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:30:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:30:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:30:47,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408672615] [2021-01-26 14:30:47,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910498929] [2021-01-26 14:30:47,757 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 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 [2021-01-26 14:30:47,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:30:47,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:30:47,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:30:47,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:30:48,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:30:48,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:30:48,286 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:30:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:30:48,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:30:48,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:30:48,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756206833] [2021-01-26 14:30:48,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:30:48,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:30:48,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:30:48,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:30:48,355 INFO L87 Difference]: Start difference. First operand 31840 states. 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) [2021-01-26 14:30:49,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:30:49,985 INFO L93 Difference]: Finished difference Result 32725 states and 73087 transitions. [2021-01-26 14:30:49,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-26 14:30:49,987 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 [2021-01-26 14:30:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:30:50,024 INFO L225 Difference]: With dead ends: 32725 [2021-01-26 14:30:50,024 INFO L226 Difference]: Without dead ends: 32470 [2021-01-26 14:30:50,025 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=445, Invalid=1361, Unknown=0, NotChecked=0, Total=1806 [2021-01-26 14:30:50,025 INFO L78 Accepts]: Start accepts. Automaton has 32470 states. Word has length 58 [2021-01-26 14:30:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:30:50,025 INFO L481 AbstractCegarLoop]: Abstraction has 32470 states. [2021-01-26 14:30:50,025 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) [2021-01-26 14:30:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 32470 states. [2021-01-26 14:30:50,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:30:50,047 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:30:50,047 INFO L504 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] [2021-01-26 14:30:50,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:30:50,248 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:30:50,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:30:50,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1058149749, now seen corresponding path program 39 times [2021-01-26 14:30:50,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:30:50,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054306748] [2021-01-26 14:30:50,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:30:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:30:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:30:50,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054306748] [2021-01-26 14:30:50,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868421613] [2021-01-26 14:30:50,626 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 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 [2021-01-26 14:30:50,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-26 14:30:50,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:30:50,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:30:50,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:30:51,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:30:51,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:30:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:30:51,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:30:51,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:30:51,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229735168] [2021-01-26 14:30:51,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:30:51,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:30:51,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:30:51,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:30:51,265 INFO L87 Difference]: Start difference. First operand 32470 states. 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) [2021-01-26 14:30:54,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:30:54,494 INFO L93 Difference]: Finished difference Result 34723 states and 77560 transitions. [2021-01-26 14:30:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-26 14:30:54,495 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 [2021-01-26 14:30:54,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:30:54,533 INFO L225 Difference]: With dead ends: 34723 [2021-01-26 14:30:54,534 INFO L226 Difference]: Without dead ends: 34080 [2021-01-26 14:30:54,534 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=795, Invalid=2745, Unknown=0, NotChecked=0, Total=3540 [2021-01-26 14:30:54,534 INFO L78 Accepts]: Start accepts. Automaton has 34080 states. Word has length 58 [2021-01-26 14:30:54,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:30:54,535 INFO L481 AbstractCegarLoop]: Abstraction has 34080 states. [2021-01-26 14:30:54,535 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) [2021-01-26 14:30:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 34080 states. [2021-01-26 14:30:54,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:30:54,559 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:30:54,559 INFO L504 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] [2021-01-26 14:30:54,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:30:54,760 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:30:54,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:30:54,761 INFO L82 PathProgramCache]: Analyzing trace with hash 2140480549, now seen corresponding path program 40 times [2021-01-26 14:30:54,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:30:54,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966027033] [2021-01-26 14:30:54,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:30:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:30:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:30:54,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966027033] [2021-01-26 14:30:54,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720346653] [2021-01-26 14:30:54,990 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 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 [2021-01-26 14:30:55,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:30:55,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:30:55,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:30:55,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:30:55,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:30:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:30:55,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:30:55,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:30:55,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274803827] [2021-01-26 14:30:55,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:30:55,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:30:55,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:30:55,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:30:55,407 INFO L87 Difference]: Start difference. First operand 34080 states. 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) [2021-01-26 14:30:57,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:30:57,206 INFO L93 Difference]: Finished difference Result 34812 states and 77527 transitions. [2021-01-26 14:30:57,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-26 14:30:57,208 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 [2021-01-26 14:30:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:30:57,247 INFO L225 Difference]: With dead ends: 34812 [2021-01-26 14:30:57,247 INFO L226 Difference]: Without dead ends: 34660 [2021-01-26 14:30:57,248 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2021-01-26 14:30:57,248 INFO L78 Accepts]: Start accepts. Automaton has 34660 states. Word has length 58 [2021-01-26 14:30:57,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:30:57,248 INFO L481 AbstractCegarLoop]: Abstraction has 34660 states. [2021-01-26 14:30:57,248 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) [2021-01-26 14:30:57,248 INFO L276 IsEmpty]: Start isEmpty. Operand 34660 states. [2021-01-26 14:30:57,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:30:57,270 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:30:57,270 INFO L504 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] [2021-01-26 14:30:57,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-01-26 14:30:57,471 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:30:57,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:30:57,472 INFO L82 PathProgramCache]: Analyzing trace with hash -741196439, now seen corresponding path program 41 times [2021-01-26 14:30:57,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:30:57,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041066243] [2021-01-26 14:30:57,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:30:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:30:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:30:57,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041066243] [2021-01-26 14:30:57,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993444230] [2021-01-26 14:30:57,731 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 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 [2021-01-26 14:30:57,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:30:57,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:30:57,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:30:57,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:30:58,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:30:58,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:30:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:30:58,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:30:58,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:30:58,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405664564] [2021-01-26 14:30:58,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:30:58,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:30:58,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:30:58,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:30:58,194 INFO L87 Difference]: Start difference. First operand 34660 states. 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) [2021-01-26 14:30:59,272 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-01-26 14:31:01,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:31:01,569 INFO L93 Difference]: Finished difference Result 38613 states and 85992 transitions. [2021-01-26 14:31:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-26 14:31:01,570 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 [2021-01-26 14:31:01,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:31:01,616 INFO L225 Difference]: With dead ends: 38613 [2021-01-26 14:31:01,616 INFO L226 Difference]: Without dead ends: 37815 [2021-01-26 14:31:01,617 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=950, Invalid=3606, Unknown=0, NotChecked=0, Total=4556 [2021-01-26 14:31:01,617 INFO L78 Accepts]: Start accepts. Automaton has 37815 states. Word has length 58 [2021-01-26 14:31:01,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:31:01,618 INFO L481 AbstractCegarLoop]: Abstraction has 37815 states. [2021-01-26 14:31:01,618 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) [2021-01-26 14:31:01,618 INFO L276 IsEmpty]: Start isEmpty. Operand 37815 states. [2021-01-26 14:31:01,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:31:01,643 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:31:01,643 INFO L504 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] [2021-01-26 14:31:01,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:31:01,851 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:31:01,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:31:01,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1706793101, now seen corresponding path program 42 times [2021-01-26 14:31:01,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:31:01,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774185856] [2021-01-26 14:31:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:31:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:31:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:31:02,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774185856] [2021-01-26 14:31:02,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059108631] [2021-01-26 14:31:02,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-26 14:31:02,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:31:02,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:31:02,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:31:02,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:31:02,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:31:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:31:02,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:31:02,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:31:02,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12727596] [2021-01-26 14:31:02,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:31:02,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:31:02,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:31:02,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:31:02,578 INFO L87 Difference]: Start difference. First operand 37815 states. 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) [2021-01-26 14:31:04,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:31:04,576 INFO L93 Difference]: Finished difference Result 39887 states and 88057 transitions. [2021-01-26 14:31:04,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-26 14:31:04,578 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 [2021-01-26 14:31:04,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:31:04,646 INFO L225 Difference]: With dead ends: 39887 [2021-01-26 14:31:04,646 INFO L226 Difference]: Without dead ends: 39735 [2021-01-26 14:31:04,647 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-01-26 14:31:04,647 INFO L78 Accepts]: Start accepts. Automaton has 39735 states. Word has length 58 [2021-01-26 14:31:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:31:04,647 INFO L481 AbstractCegarLoop]: Abstraction has 39735 states. [2021-01-26 14:31:04,647 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) [2021-01-26 14:31:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 39735 states. [2021-01-26 14:31:04,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:31:04,683 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:31:04,683 INFO L504 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] [2021-01-26 14:31:04,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:31:04,898 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:31:04,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:31:04,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1968381677, now seen corresponding path program 43 times [2021-01-26 14:31:04,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:31:04,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427961751] [2021-01-26 14:31:04,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:31:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:31:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:31:05,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427961751] [2021-01-26 14:31:05,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135723546] [2021-01-26 14:31:05,126 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:31:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:31:05,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:31:05,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:31:05,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:31:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:31:05,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:31:05,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:31:05,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459212609] [2021-01-26 14:31:05,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:31:05,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:31:05,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:31:05,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:31:05,593 INFO L87 Difference]: Start difference. First operand 39735 states. 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) [2021-01-26 14:31:07,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:31:07,956 INFO L93 Difference]: Finished difference Result 40677 states and 89732 transitions. [2021-01-26 14:31:07,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-26 14:31:07,957 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 [2021-01-26 14:31:07,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:31:08,003 INFO L225 Difference]: With dead ends: 40677 [2021-01-26 14:31:08,003 INFO L226 Difference]: Without dead ends: 40525 [2021-01-26 14:31:08,004 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=637, Invalid=2015, Unknown=0, NotChecked=0, Total=2652 [2021-01-26 14:31:08,004 INFO L78 Accepts]: Start accepts. Automaton has 40525 states. Word has length 58 [2021-01-26 14:31:08,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:31:08,004 INFO L481 AbstractCegarLoop]: Abstraction has 40525 states. [2021-01-26 14:31:08,004 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) [2021-01-26 14:31:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 40525 states. [2021-01-26 14:31:08,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:31:08,034 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:31:08,034 INFO L504 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] [2021-01-26 14:31:08,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-01-26 14:31:08,235 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:31:08,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:31:08,235 INFO L82 PathProgramCache]: Analyzing trace with hash -555091369, now seen corresponding path program 44 times [2021-01-26 14:31:08,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:31:08,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340703359] [2021-01-26 14:31:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:31:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:31:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:31:08,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340703359] [2021-01-26 14:31:08,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200596128] [2021-01-26 14:31:08,498 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:31:08,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:31:08,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:31:08,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:31:08,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:31:08,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:31:08,999 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:31:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:31:09,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:31:09,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:31:09,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080049641] [2021-01-26 14:31:09,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:31:09,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:31:09,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:31:09,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:31:09,016 INFO L87 Difference]: Start difference. First operand 40525 states. 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) Received shutdown request... [2021-01-26 14:31:09,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-26 14:31:09,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:31:09,664 WARN L546 AbstractCegarLoop]: Verification canceled [2021-01-26 14:31:09,670 WARN L250 ceAbstractionStarter]: Timeout [2021-01-26 14:31:09,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.01 02:31:09 BasicIcfg [2021-01-26 14:31:09,671 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-26 14:31:09,672 INFO L168 Benchmark]: Toolchain (without parser) took 836928.94 ms. Allocated memory was 304.1 MB in the beginning and 2.9 GB in the end (delta: 2.6 GB). Free memory was 279.2 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. [2021-01-26 14:31:09,672 INFO L168 Benchmark]: CDTParser took 0.78 ms. Allocated memory is still 304.1 MB. Free memory is still 274.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-01-26 14:31:09,673 INFO L168 Benchmark]: CACSL2BoogieTranslator took 761.45 ms. Allocated memory is still 304.1 MB. Free memory was 278.3 MB in the beginning and 249.3 MB in the end (delta: 29.0 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. [2021-01-26 14:31:09,673 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.06 ms. Allocated memory is still 304.1 MB. Free memory was 249.2 MB in the beginning and 247.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-01-26 14:31:09,673 INFO L168 Benchmark]: Boogie Preprocessor took 29.63 ms. Allocated memory is still 304.1 MB. Free memory was 247.5 MB in the beginning and 246.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-01-26 14:31:09,673 INFO L168 Benchmark]: RCFGBuilder took 632.34 ms. Allocated memory is still 304.1 MB. Free memory was 246.1 MB in the beginning and 269.4 MB in the end (delta: -23.4 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. [2021-01-26 14:31:09,674 INFO L168 Benchmark]: TraceAbstraction took 835438.97 ms. Allocated memory was 304.1 MB in the beginning and 2.9 GB in the end (delta: 2.6 GB). Free memory was 268.4 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. [2021-01-26 14:31:09,676 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.78 ms. Allocated memory is still 304.1 MB. Free memory is still 274.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 761.45 ms. Allocated memory is still 304.1 MB. Free memory was 278.3 MB in the beginning and 249.3 MB in the end (delta: 29.0 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 47.06 ms. Allocated memory is still 304.1 MB. Free memory was 249.2 MB in the beginning and 247.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 29.63 ms. Allocated memory is still 304.1 MB. Free memory was 247.5 MB in the beginning and 246.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 632.34 ms. Allocated memory is still 304.1 MB. Free memory was 246.1 MB in the beginning and 269.4 MB in the end (delta: -23.4 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 835438.97 ms. Allocated memory was 304.1 MB in the beginning and 2.9 GB in the end (delta: 2.6 GB). Free memory was 268.4 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 20]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 20). Cancelled while BasicCegarLoop was constructing difference of abstraction (40525states) and FLOYD_HOARE automaton (currently 11 states, 21 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 28 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 835.2s, OverallIterations: 76, TraceHistogramMax: 5, AutomataDifference: 762.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 6752 SDtfs, 44677 SDslu, 63583 SDs, 0 SdLazy, 10824 SolverSat, 3231 SolverUnsat, 294 SolverUnknown, 0 SolverNotchecked, 559.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5554 GetRequests, 3168 SyntacticMatches, 32 SemanticMatches, 2353 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 25919 ImplicationChecksByTransitivity, 221.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40525occurred in iteration=75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 49.2s InterpolantComputationTime, 7485 NumberOfCodeBlocks, 7485 NumberOfCodeBlocksAsserted, 248 NumberOfCheckSat, 7340 ConstructedInterpolants, 6 QuantifiedInterpolants, 2883670 SizeOfPredicates, 279 NumberOfNonLiveVariables, 9043 ConjunctsInSsa, 827 ConjunctsInUnsatCore, 145 InterpolantComputations, 7 PerfectInterpolantSequences, 0/2022 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