/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-12 03:01:50,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-12 03:01:50,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-12 03:01:51,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-12 03:01:51,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-12 03:01:51,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-12 03:01:51,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-12 03:01:51,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-12 03:01:51,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-12 03:01:51,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-12 03:01:51,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-12 03:01:51,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-12 03:01:51,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-12 03:01:51,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-12 03:01:51,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-12 03:01:51,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-12 03:01:51,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-12 03:01:51,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-12 03:01:51,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-12 03:01:51,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-12 03:01:51,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-12 03:01:51,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-12 03:01:51,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-12 03:01:51,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-12 03:01:51,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-12 03:01:51,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-12 03:01:51,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-12 03:01:51,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-12 03:01:51,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-12 03:01:51,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-12 03:01:51,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-12 03:01:51,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-12 03:01:51,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-12 03:01:51,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-12 03:01:51,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-12 03:01:51,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-12 03:01:51,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-12 03:01:51,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-12 03:01:51,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-12 03:01:51,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-12 03:01:51,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-12 03:01:51,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2020-11-12 03:01:51,170 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-12 03:01:51,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-12 03:01:51,176 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-12 03:01:51,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-12 03:01:51,177 INFO L138 SettingsManager]: * Use SBE=true [2020-11-12 03:01:51,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-12 03:01:51,177 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-12 03:01:51,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-12 03:01:51,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-12 03:01:51,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-12 03:01:51,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-12 03:01:51,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-12 03:01:51,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-12 03:01:51,181 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-12 03:01:51,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-12 03:01:51,181 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-12 03:01:51,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-12 03:01:51,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-12 03:01:51,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-12 03:01:51,182 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-12 03:01:51,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-12 03:01:51,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-12 03:01:51,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-12 03:01:51,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-12 03:01:51,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-12 03:01:51,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-12 03:01:51,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-12 03:01:51,184 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-12 03:01:51,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-12 03:01:51,184 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-12 03:01:51,185 INFO L138 SettingsManager]: * Sleep set reduction in concurrent analysis=DELAY_SET WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-12 03:01:51,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-12 03:01:51,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-12 03:01:51,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-12 03:01:51,591 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-12 03:01:51,592 INFO L275 PluginConnector]: CDTParser initialized [2020-11-12 03:01:51,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-11-12 03:01:51,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06f194ae0/c1e65d86073b4954a3ada8391be8fcac/FLAG7bc7176b9 [2020-11-12 03:01:52,540 INFO L306 CDTParser]: Found 1 translation units. [2020-11-12 03:01:52,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-11-12 03:01:52,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06f194ae0/c1e65d86073b4954a3ada8391be8fcac/FLAG7bc7176b9 [2020-11-12 03:01:52,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06f194ae0/c1e65d86073b4954a3ada8391be8fcac [2020-11-12 03:01:52,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-12 03:01:52,764 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-12 03:01:52,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-12 03:01:52,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-12 03:01:52,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-12 03:01:52,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 03:01:52" (1/1) ... [2020-11-12 03:01:52,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63ad34b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:52, skipping insertion in model container [2020-11-12 03:01:52,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 03:01:52" (1/1) ... [2020-11-12 03:01:52,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-12 03:01:52,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-12 03:01:53,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 03:01:53,204 INFO L203 MainTranslator]: Completed pre-run [2020-11-12 03:01:53,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 03:01:53,338 INFO L208 MainTranslator]: Completed translation [2020-11-12 03:01:53,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:53 WrapperNode [2020-11-12 03:01:53,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-12 03:01:53,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-12 03:01:53,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-12 03:01:53,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-12 03:01:53,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:53" (1/1) ... [2020-11-12 03:01:53,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:53" (1/1) ... [2020-11-12 03:01:53,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-12 03:01:53,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-12 03:01:53,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-12 03:01:53,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-12 03:01:53,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:53" (1/1) ... [2020-11-12 03:01:53,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:53" (1/1) ... [2020-11-12 03:01:53,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:53" (1/1) ... [2020-11-12 03:01:53,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:53" (1/1) ... [2020-11-12 03:01:53,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:53" (1/1) ... [2020-11-12 03:01:53,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:53" (1/1) ... [2020-11-12 03:01:53,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:53" (1/1) ... [2020-11-12 03:01:53,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-12 03:01:53,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-12 03:01:53,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-12 03:01:53,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-12 03:01:53,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-12 03:01:53,538 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-12 03:01:53,539 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-12 03:01:53,540 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-12 03:01:53,540 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-12 03:01:53,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-12 03:01:53,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-12 03:01:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-12 03:01:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-12 03:01:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-12 03:01:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-12 03:01:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-12 03:01:53,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-12 03:01:53,547 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-12 03:01:54,043 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-12 03:01:54,044 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-12 03:01:54,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 03:01:54 BoogieIcfgContainer [2020-11-12 03:01:54,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-12 03:01:54,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-12 03:01:54,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-12 03:01:54,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-12 03:01:54,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 03:01:52" (1/3) ... [2020-11-12 03:01:54,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba66487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 03:01:54, skipping insertion in model container [2020-11-12 03:01:54,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:01:53" (2/3) ... [2020-11-12 03:01:54,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba66487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 03:01:54, skipping insertion in model container [2020-11-12 03:01:54,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 03:01:54" (3/3) ... [2020-11-12 03:01:54,058 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-11-12 03:01:54,080 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-12 03:01:54,081 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-12 03:01:54,085 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-12 03:01:54,086 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-12 03:01:54,132 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,132 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,133 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,133 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,134 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,134 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,134 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,134 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,135 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,136 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,137 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,137 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,137 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,137 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,139 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,139 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,140 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,140 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,140 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,140 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,140 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,141 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,141 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,141 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,141 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,142 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,142 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,143 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,143 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,144 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,145 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,145 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,145 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,145 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,146 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,146 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,147 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,147 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,148 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,148 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,149 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,149 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,149 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,149 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,150 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,150 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,150 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,151 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,151 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,151 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,152 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,152 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,152 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,152 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,152 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,153 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,153 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,153 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,156 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,156 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,159 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,159 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,159 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,160 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,160 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,160 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,167 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,168 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,168 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,168 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,168 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,168 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 03:01:54,176 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-12 03:01:54,192 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-12 03:01:54,237 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-12 03:01:54,237 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-12 03:01:54,238 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-12 03:01:54,238 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-12 03:01:54,238 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-12 03:01:54,238 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-12 03:01:54,239 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-12 03:01:54,239 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-12 03:01:54,255 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2020-11-12 03:01:54,421 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:54,612 WARN L455 BasicCegarLoop]: Sleep Set Reduction Time: 187ms [2020-11-12 03:01:54,620 WARN L456 BasicCegarLoop]: Sleep set: input automaton has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:54,625 WARN L457 BasicCegarLoop]: Sleep set: output automaton has 2229 states, 1987 states have (on average 1.3839959738298944) internal successors, (2750), 2228 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:54,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 2229 states, 1987 states have (on average 1.3839959738298944) internal successors, (2750), 2228 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:54,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-12 03:01:54,640 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:54,641 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:54,642 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:54,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:54,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1113047899, now seen corresponding path program 1 times [2020-11-12 03:01:54,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:54,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345062711] [2020-11-12 03:01:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:55,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345062711] [2020-11-12 03:01:55,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 03:01:55,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-12 03:01:55,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283527592] [2020-11-12 03:01:55,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-12 03:01:55,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:55,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-12 03:01:55,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-12 03:01:55,188 INFO L87 Difference]: Start difference. First operand has 2229 states, 1987 states have (on average 1.3839959738298944) internal successors, (2750), 2228 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:55,374 INFO L93 Difference]: Finished difference Result 4034 states and 4762 transitions. [2020-11-12 03:01:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-12 03:01:55,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2020-11-12 03:01:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:55,402 INFO L225 Difference]: With dead ends: 4034 [2020-11-12 03:01:55,402 INFO L226 Difference]: Without dead ends: 1358 [2020-11-12 03:01:55,404 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-12 03:01:55,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2020-11-12 03:01:55,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1028. [2020-11-12 03:01:55,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 916 states have (on average 1.4475982532751093) internal successors, (1326), 1027 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1326 transitions. [2020-11-12 03:01:55,519 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1326 transitions. Word has length 28 [2020-11-12 03:01:55,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:55,519 INFO L481 AbstractCegarLoop]: Abstraction has 1028 states and 1326 transitions. [2020-11-12 03:01:55,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:55,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1326 transitions. [2020-11-12 03:01:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-12 03:01:55,524 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:55,524 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:55,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-12 03:01:55,525 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:55,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:55,526 INFO L82 PathProgramCache]: Analyzing trace with hash 883557971, now seen corresponding path program 1 times [2020-11-12 03:01:55,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:55,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685875988] [2020-11-12 03:01:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:55,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685875988] [2020-11-12 03:01:55,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 03:01:55,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-12 03:01:55,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293505746] [2020-11-12 03:01:55,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 03:01:55,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:55,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 03:01:55,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-12 03:01:55,775 INFO L87 Difference]: Start difference. First operand 1028 states and 1326 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:55,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:55,928 INFO L93 Difference]: Finished difference Result 1846 states and 2540 transitions. [2020-11-12 03:01:55,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-12 03:01:55,929 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2020-11-12 03:01:55,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:55,937 INFO L225 Difference]: With dead ends: 1846 [2020-11-12 03:01:55,938 INFO L226 Difference]: Without dead ends: 1486 [2020-11-12 03:01:55,939 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-12 03:01:55,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2020-11-12 03:01:55,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1060. [2020-11-12 03:01:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 948 states have (on average 1.4451476793248945) internal successors, (1370), 1059 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:55,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1370 transitions. [2020-11-12 03:01:55,980 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1370 transitions. Word has length 33 [2020-11-12 03:01:55,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:55,980 INFO L481 AbstractCegarLoop]: Abstraction has 1060 states and 1370 transitions. [2020-11-12 03:01:55,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1370 transitions. [2020-11-12 03:01:55,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-12 03:01:55,983 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:55,984 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:55,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-12 03:01:55,984 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:55,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:55,985 INFO L82 PathProgramCache]: Analyzing trace with hash -31625489, now seen corresponding path program 1 times [2020-11-12 03:01:55,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:55,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602563447] [2020-11-12 03:01:55,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:56,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602563447] [2020-11-12 03:01:56,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 03:01:56,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-12 03:01:56,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792374210] [2020-11-12 03:01:56,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 03:01:56,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:56,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 03:01:56,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-12 03:01:56,166 INFO L87 Difference]: Start difference. First operand 1060 states and 1370 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:56,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:56,332 INFO L93 Difference]: Finished difference Result 1966 states and 2747 transitions. [2020-11-12 03:01:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-12 03:01:56,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2020-11-12 03:01:56,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:56,342 INFO L225 Difference]: With dead ends: 1966 [2020-11-12 03:01:56,342 INFO L226 Difference]: Without dead ends: 1584 [2020-11-12 03:01:56,343 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-11-12 03:01:56,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2020-11-12 03:01:56,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1187. [2020-11-12 03:01:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1075 states have (on average 1.453953488372093) internal successors, (1563), 1186 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1563 transitions. [2020-11-12 03:01:56,383 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1563 transitions. Word has length 33 [2020-11-12 03:01:56,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:56,383 INFO L481 AbstractCegarLoop]: Abstraction has 1187 states and 1563 transitions. [2020-11-12 03:01:56,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:56,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1563 transitions. [2020-11-12 03:01:56,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 03:01:56,386 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:56,387 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:56,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-12 03:01:56,387 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:56,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:56,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1463751740, now seen corresponding path program 1 times [2020-11-12 03:01:56,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:56,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498580479] [2020-11-12 03:01:56,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:56,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498580479] [2020-11-12 03:01:56,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636062158] [2020-11-12 03:01:56,589 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 [2020-11-12 03:01:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:56,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-12 03:01:56,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:56,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:56,891 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:56,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:56,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-11-12 03:01:56,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227072514] [2020-11-12 03:01:56,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-12 03:01:56,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:56,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-12 03:01:56,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-12 03:01:56,913 INFO L87 Difference]: Start difference. First operand 1187 states and 1563 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:57,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:57,192 INFO L93 Difference]: Finished difference Result 2368 states and 3365 transitions. [2020-11-12 03:01:57,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-12 03:01:57,193 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2020-11-12 03:01:57,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:57,203 INFO L225 Difference]: With dead ends: 2368 [2020-11-12 03:01:57,203 INFO L226 Difference]: Without dead ends: 1824 [2020-11-12 03:01:57,204 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:01:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2020-11-12 03:01:57,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1197. [2020-11-12 03:01:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1085 states have (on average 1.4608294930875576) internal successors, (1585), 1196 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:57,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1585 transitions. [2020-11-12 03:01:57,244 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1585 transitions. Word has length 38 [2020-11-12 03:01:57,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:57,245 INFO L481 AbstractCegarLoop]: Abstraction has 1197 states and 1585 transitions. [2020-11-12 03:01:57,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:57,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1585 transitions. [2020-11-12 03:01:57,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 03:01:57,247 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:57,247 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:57,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:57,463 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:57,464 INFO L82 PathProgramCache]: Analyzing trace with hash -166312201, now seen corresponding path program 1 times [2020-11-12 03:01:57,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:57,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413567953] [2020-11-12 03:01:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:57,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413567953] [2020-11-12 03:01:57,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 03:01:57,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-12 03:01:57,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254109026] [2020-11-12 03:01:57,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-12 03:01:57,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:57,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-12 03:01:57,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-12 03:01:57,696 INFO L87 Difference]: Start difference. First operand 1197 states and 1585 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:57,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:57,902 INFO L93 Difference]: Finished difference Result 2208 states and 3197 transitions. [2020-11-12 03:01:57,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-12 03:01:57,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2020-11-12 03:01:57,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:57,912 INFO L225 Difference]: With dead ends: 2208 [2020-11-12 03:01:57,913 INFO L226 Difference]: Without dead ends: 1920 [2020-11-12 03:01:57,914 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-11-12 03:01:57,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2020-11-12 03:01:57,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1270. [2020-11-12 03:01:57,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1158 states have (on average 1.461139896373057) internal successors, (1692), 1269 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:57,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1692 transitions. [2020-11-12 03:01:57,978 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1692 transitions. Word has length 38 [2020-11-12 03:01:57,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:57,979 INFO L481 AbstractCegarLoop]: Abstraction has 1270 states and 1692 transitions. [2020-11-12 03:01:57,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:57,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1692 transitions. [2020-11-12 03:01:57,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-12 03:01:57,981 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:57,981 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:57,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-12 03:01:57,981 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:57,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:57,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1418492519, now seen corresponding path program 2 times [2020-11-12 03:01:57,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:57,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289272693] [2020-11-12 03:01:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:58,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289272693] [2020-11-12 03:01:58,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 03:01:58,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-12 03:01:58,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502785157] [2020-11-12 03:01:58,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-12 03:01:58,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:58,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-12 03:01:58,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-12 03:01:58,188 INFO L87 Difference]: Start difference. First operand 1270 states and 1692 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:58,436 INFO L93 Difference]: Finished difference Result 2549 states and 3759 transitions. [2020-11-12 03:01:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-12 03:01:58,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2020-11-12 03:01:58,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:58,447 INFO L225 Difference]: With dead ends: 2549 [2020-11-12 03:01:58,447 INFO L226 Difference]: Without dead ends: 2031 [2020-11-12 03:01:58,448 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-11-12 03:01:58,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2020-11-12 03:01:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1366. [2020-11-12 03:01:58,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1254 states have (on average 1.463317384370016) internal successors, (1835), 1365 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1835 transitions. [2020-11-12 03:01:58,489 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1835 transitions. Word has length 38 [2020-11-12 03:01:58,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:58,490 INFO L481 AbstractCegarLoop]: Abstraction has 1366 states and 1835 transitions. [2020-11-12 03:01:58,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:58,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1835 transitions. [2020-11-12 03:01:58,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-12 03:01:58,492 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:58,492 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:58,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-12 03:01:58,493 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:58,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:58,493 INFO L82 PathProgramCache]: Analyzing trace with hash 643440678, now seen corresponding path program 1 times [2020-11-12 03:01:58,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:58,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299932040] [2020-11-12 03:01:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:58,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299932040] [2020-11-12 03:01:58,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722303429] [2020-11-12 03:01:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:01:58,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 03:01:58,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:01:59,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:01:59,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:01:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:01:59,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:01:59,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-12 03:01:59,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50963824] [2020-11-12 03:01:59,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 03:01:59,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:01:59,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 03:01:59,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-12 03:01:59,087 INFO L87 Difference]: Start difference. First operand 1366 states and 1835 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:59,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:01:59,596 INFO L93 Difference]: Finished difference Result 2698 states and 4062 transitions. [2020-11-12 03:01:59,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-12 03:01:59,597 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2020-11-12 03:01:59,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:01:59,609 INFO L225 Difference]: With dead ends: 2698 [2020-11-12 03:01:59,609 INFO L226 Difference]: Without dead ends: 2274 [2020-11-12 03:01:59,610 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2020-11-12 03:01:59,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2020-11-12 03:01:59,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 1426. [2020-11-12 03:01:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1314 states have (on average 1.4672754946727549) internal successors, (1928), 1425 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:59,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 1928 transitions. [2020-11-12 03:01:59,690 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 1928 transitions. Word has length 43 [2020-11-12 03:01:59,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:01:59,690 INFO L481 AbstractCegarLoop]: Abstraction has 1426 states and 1928 transitions. [2020-11-12 03:01:59,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:01:59,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 1928 transitions. [2020-11-12 03:01:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-12 03:01:59,694 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:01:59,695 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:01:59,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:01:59,909 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:01:59,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:01:59,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1643454454, now seen corresponding path program 1 times [2020-11-12 03:01:59,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:01:59,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200497444] [2020-11-12 03:01:59,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:01:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:00,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200497444] [2020-11-12 03:02:00,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50855722] [2020-11-12 03:02:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:00,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 03:02:00,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:00,307 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:00,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:00,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:00,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-12 03:02:00,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274901280] [2020-11-12 03:02:00,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 03:02:00,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:00,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 03:02:00,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-12 03:02:00,343 INFO L87 Difference]: Start difference. First operand 1426 states and 1928 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:01,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:01,065 INFO L93 Difference]: Finished difference Result 3567 states and 5463 transitions. [2020-11-12 03:02:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-12 03:02:01,066 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2020-11-12 03:02:01,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:01,080 INFO L225 Difference]: With dead ends: 3567 [2020-11-12 03:02:01,081 INFO L226 Difference]: Without dead ends: 2747 [2020-11-12 03:02:01,082 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 03:02:01,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2020-11-12 03:02:01,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 1676. [2020-11-12 03:02:01,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1564 states have (on average 1.4974424552429668) internal successors, (2342), 1675 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:01,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2342 transitions. [2020-11-12 03:02:01,134 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 2342 transitions. Word has length 43 [2020-11-12 03:02:01,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:01,135 INFO L481 AbstractCegarLoop]: Abstraction has 1676 states and 2342 transitions. [2020-11-12 03:02:01,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:01,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 2342 transitions. [2020-11-12 03:02:01,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:02:01,138 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:01,138 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:01,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:01,353 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:01,354 INFO L82 PathProgramCache]: Analyzing trace with hash -160149212, now seen corresponding path program 2 times [2020-11-12 03:02:01,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:01,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490270399] [2020-11-12 03:02:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:01,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490270399] [2020-11-12 03:02:01,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917610362] [2020-11-12 03:02:01,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:01,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:01,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:01,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:02:01,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:01,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:01,848 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:01,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:01,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-11-12 03:02:01,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759702176] [2020-11-12 03:02:01,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 03:02:01,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:01,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 03:02:01,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-12 03:02:01,870 INFO L87 Difference]: Start difference. First operand 1676 states and 2342 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:02,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:02,126 INFO L93 Difference]: Finished difference Result 3060 states and 4480 transitions. [2020-11-12 03:02:02,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-12 03:02:02,127 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-12 03:02:02,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:02,140 INFO L225 Difference]: With dead ends: 3060 [2020-11-12 03:02:02,140 INFO L226 Difference]: Without dead ends: 2516 [2020-11-12 03:02:02,141 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2020-11-12 03:02:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2020-11-12 03:02:02,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 1686. [2020-11-12 03:02:02,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1574 states have (on average 1.5019059720457433) internal successors, (2364), 1685 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:02,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 2364 transitions. [2020-11-12 03:02:02,195 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 2364 transitions. Word has length 48 [2020-11-12 03:02:02,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:02,196 INFO L481 AbstractCegarLoop]: Abstraction has 1686 states and 2364 transitions. [2020-11-12 03:02:02,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:02,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 2364 transitions. [2020-11-12 03:02:02,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:02:02,199 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:02,199 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:02,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:02,414 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:02,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:02,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1137290327, now seen corresponding path program 2 times [2020-11-12 03:02:02,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:02,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559496790] [2020-11-12 03:02:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:02,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559496790] [2020-11-12 03:02:02,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938557120] [2020-11-12 03:02:02,545 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 [2020-11-12 03:02:02,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:02,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:02,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:02:02,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:02,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:02,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:02,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:02,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 03:02:02,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368074830] [2020-11-12 03:02:02,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 03:02:02,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:02,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 03:02:02,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-11-12 03:02:02,766 INFO L87 Difference]: Start difference. First operand 1686 states and 2364 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:03,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:03,375 INFO L93 Difference]: Finished difference Result 3340 states and 5112 transitions. [2020-11-12 03:02:03,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 03:02:03,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-12 03:02:03,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:03,392 INFO L225 Difference]: With dead ends: 3340 [2020-11-12 03:02:03,392 INFO L226 Difference]: Without dead ends: 2916 [2020-11-12 03:02:03,393 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2020-11-12 03:02:03,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2020-11-12 03:02:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 1741. [2020-11-12 03:02:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1629 states have (on average 1.4984653161448742) internal successors, (2441), 1740 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2441 transitions. [2020-11-12 03:02:03,459 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2441 transitions. Word has length 48 [2020-11-12 03:02:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:03,460 INFO L481 AbstractCegarLoop]: Abstraction has 1741 states and 2441 transitions. [2020-11-12 03:02:03,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2441 transitions. [2020-11-12 03:02:03,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:02:03,463 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:03,464 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:03,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-12 03:02:03,680 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:03,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1149604805, now seen corresponding path program 1 times [2020-11-12 03:02:03,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:03,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144005753] [2020-11-12 03:02:03,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:03,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144005753] [2020-11-12 03:02:03,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047766418] [2020-11-12 03:02:03,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:03,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:02:03,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:04,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:04,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:04,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:04,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 03:02:04,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293741702] [2020-11-12 03:02:04,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 03:02:04,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:04,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 03:02:04,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-11-12 03:02:04,211 INFO L87 Difference]: Start difference. First operand 1741 states and 2441 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:05,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:05,019 INFO L93 Difference]: Finished difference Result 3680 states and 5696 transitions. [2020-11-12 03:02:05,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 03:02:05,020 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-12 03:02:05,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:05,038 INFO L225 Difference]: With dead ends: 3680 [2020-11-12 03:02:05,038 INFO L226 Difference]: Without dead ends: 3256 [2020-11-12 03:02:05,041 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=336, Invalid=1146, Unknown=0, NotChecked=0, Total=1482 [2020-11-12 03:02:05,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2020-11-12 03:02:05,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 1729. [2020-11-12 03:02:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1617 states have (on average 1.4959802102659245) internal successors, (2419), 1728 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2419 transitions. [2020-11-12 03:02:05,127 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2419 transitions. Word has length 48 [2020-11-12 03:02:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:05,128 INFO L481 AbstractCegarLoop]: Abstraction has 1729 states and 2419 transitions. [2020-11-12 03:02:05,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:05,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2419 transitions. [2020-11-12 03:02:05,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:02:05,131 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:05,131 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:05,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:05,345 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:05,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1684291189, now seen corresponding path program 2 times [2020-11-12 03:02:05,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:05,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274406477] [2020-11-12 03:02:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:05,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274406477] [2020-11-12 03:02:05,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089533146] [2020-11-12 03:02:05,498 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:05,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:05,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:05,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:02:05,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:05,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:05,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:05,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 03:02:05,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801805369] [2020-11-12 03:02:05,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 03:02:05,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:05,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 03:02:05,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-11-12 03:02:05,712 INFO L87 Difference]: Start difference. First operand 1729 states and 2419 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:06,271 INFO L93 Difference]: Finished difference Result 3165 states and 4915 transitions. [2020-11-12 03:02:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-12 03:02:06,272 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-12 03:02:06,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:06,287 INFO L225 Difference]: With dead ends: 3165 [2020-11-12 03:02:06,288 INFO L226 Difference]: Without dead ends: 3013 [2020-11-12 03:02:06,288 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2020-11-12 03:02:06,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2020-11-12 03:02:06,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 1886. [2020-11-12 03:02:06,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1774 states have (on average 1.5231116121758737) internal successors, (2702), 1885 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:06,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 2702 transitions. [2020-11-12 03:02:06,346 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 2702 transitions. Word has length 48 [2020-11-12 03:02:06,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:06,347 INFO L481 AbstractCegarLoop]: Abstraction has 1886 states and 2702 transitions. [2020-11-12 03:02:06,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:06,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 2702 transitions. [2020-11-12 03:02:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-12 03:02:06,350 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:06,350 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:06,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:06,566 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:06,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:06,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1123361077, now seen corresponding path program 3 times [2020-11-12 03:02:06,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:06,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222707280] [2020-11-12 03:02:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:06,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222707280] [2020-11-12 03:02:06,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450585454] [2020-11-12 03:02:06,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:06,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-12 03:02:06,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:06,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 03:02:06,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:06,904 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:06,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:06,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:06,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-12 03:02:06,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145953951] [2020-11-12 03:02:06,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 03:02:06,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:06,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 03:02:06,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-11-12 03:02:06,925 INFO L87 Difference]: Start difference. First operand 1886 states and 2702 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:08,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:08,047 INFO L93 Difference]: Finished difference Result 4419 states and 6911 transitions. [2020-11-12 03:02:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 03:02:08,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-12 03:02:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:08,056 INFO L225 Difference]: With dead ends: 4419 [2020-11-12 03:02:08,056 INFO L226 Difference]: Without dead ends: 3765 [2020-11-12 03:02:08,057 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=488, Invalid=1674, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 03:02:08,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3765 states. [2020-11-12 03:02:08,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3765 to 1909. [2020-11-12 03:02:08,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1909 states, 1797 states have (on average 1.516972732331664) internal successors, (2726), 1908 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1909 states to 1909 states and 2726 transitions. [2020-11-12 03:02:08,123 INFO L78 Accepts]: Start accepts. Automaton has 1909 states and 2726 transitions. Word has length 48 [2020-11-12 03:02:08,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:08,123 INFO L481 AbstractCegarLoop]: Abstraction has 1909 states and 2726 transitions. [2020-11-12 03:02:08,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:08,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1909 states and 2726 transitions. [2020-11-12 03:02:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:08,126 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:08,127 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:08,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-12 03:02:08,340 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:08,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:08,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1842288326, now seen corresponding path program 3 times [2020-11-12 03:02:08,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:08,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505500142] [2020-11-12 03:02:08,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:08,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505500142] [2020-11-12 03:02:08,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775243698] [2020-11-12 03:02:08,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:08,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 03:02:08,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:08,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:08,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:08,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:08,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:08,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:08,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:08,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832209977] [2020-11-12 03:02:08,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:08,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:08,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:08,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:08,838 INFO L87 Difference]: Start difference. First operand 1909 states and 2726 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:09,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:09,555 INFO L93 Difference]: Finished difference Result 3843 states and 5977 transitions. [2020-11-12 03:02:09,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 03:02:09,557 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:09,564 INFO L225 Difference]: With dead ends: 3843 [2020-11-12 03:02:09,565 INFO L226 Difference]: Without dead ends: 3419 [2020-11-12 03:02:09,565 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2020-11-12 03:02:09,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3419 states. [2020-11-12 03:02:09,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3419 to 1984. [2020-11-12 03:02:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1872 states have (on average 1.5144230769230769) internal successors, (2835), 1983 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 2835 transitions. [2020-11-12 03:02:09,624 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 2835 transitions. Word has length 53 [2020-11-12 03:02:09,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:09,625 INFO L481 AbstractCegarLoop]: Abstraction has 1984 states and 2835 transitions. [2020-11-12 03:02:09,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:09,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 2835 transitions. [2020-11-12 03:02:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:09,628 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:09,628 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:09,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:09,844 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:09,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:09,845 INFO L82 PathProgramCache]: Analyzing trace with hash -444606806, now seen corresponding path program 4 times [2020-11-12 03:02:09,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:09,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583873810] [2020-11-12 03:02:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:10,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583873810] [2020-11-12 03:02:10,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892561715] [2020-11-12 03:02:10,040 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:10,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:02:10,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:10,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:02:10,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:10,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:10,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:10,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:10,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:10,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:10,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 03:02:10,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749284669] [2020-11-12 03:02:10,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 03:02:10,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:10,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 03:02:10,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-11-12 03:02:10,433 INFO L87 Difference]: Start difference. First operand 1984 states and 2835 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:11,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:11,734 INFO L93 Difference]: Finished difference Result 4645 states and 7501 transitions. [2020-11-12 03:02:11,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 03:02:11,734 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:11,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:11,740 INFO L225 Difference]: With dead ends: 4645 [2020-11-12 03:02:11,741 INFO L226 Difference]: Without dead ends: 4045 [2020-11-12 03:02:11,742 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=483, Invalid=1869, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 03:02:11,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4045 states. [2020-11-12 03:02:11,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4045 to 2021. [2020-11-12 03:02:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2021 states, 1909 states have (on average 1.5275013095861707) internal successors, (2916), 2020 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 2916 transitions. [2020-11-12 03:02:11,809 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 2916 transitions. Word has length 53 [2020-11-12 03:02:11,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:11,810 INFO L481 AbstractCegarLoop]: Abstraction has 2021 states and 2916 transitions. [2020-11-12 03:02:11,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:11,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 2916 transitions. [2020-11-12 03:02:11,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:11,813 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:11,813 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:12,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-12 03:02:12,028 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:12,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1905678108, now seen corresponding path program 5 times [2020-11-12 03:02:12,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:12,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371073050] [2020-11-12 03:02:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:12,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371073050] [2020-11-12 03:02:12,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974431996] [2020-11-12 03:02:12,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:12,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 03:02:12,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:12,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:12,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:12,492 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:12,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:12,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:12,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370831736] [2020-11-12 03:02:12,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:12,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:12,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:12,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:12,505 INFO L87 Difference]: Start difference. First operand 2021 states and 2916 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:13,258 INFO L93 Difference]: Finished difference Result 3590 states and 5670 transitions. [2020-11-12 03:02:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-12 03:02:13,258 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:13,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:13,266 INFO L225 Difference]: With dead ends: 3590 [2020-11-12 03:02:13,266 INFO L226 Difference]: Without dead ends: 3438 [2020-11-12 03:02:13,267 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2020-11-12 03:02:13,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3438 states. [2020-11-12 03:02:13,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3438 to 2046. [2020-11-12 03:02:13,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 1934 states have (on average 1.5418821096173734) internal successors, (2982), 2045 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 2982 transitions. [2020-11-12 03:02:13,322 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 2982 transitions. Word has length 53 [2020-11-12 03:02:13,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:13,322 INFO L481 AbstractCegarLoop]: Abstraction has 2046 states and 2982 transitions. [2020-11-12 03:02:13,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 2982 transitions. [2020-11-12 03:02:13,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:13,326 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:13,326 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:13,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-12 03:02:13,540 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:13,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:13,541 INFO L82 PathProgramCache]: Analyzing trace with hash -418363078, now seen corresponding path program 6 times [2020-11-12 03:02:13,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:13,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440059410] [2020-11-12 03:02:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:13,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440059410] [2020-11-12 03:02:13,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499008472] [2020-11-12 03:02:13,758 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:13,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 03:02:13,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:13,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:13,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:14,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:14,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:14,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:14,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 03:02:14,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748609908] [2020-11-12 03:02:14,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 03:02:14,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:14,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 03:02:14,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-12 03:02:14,199 INFO L87 Difference]: Start difference. First operand 2046 states and 2982 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:16,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:16,158 INFO L93 Difference]: Finished difference Result 4980 states and 8104 transitions. [2020-11-12 03:02:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-12 03:02:16,158 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:16,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:16,174 INFO L225 Difference]: With dead ends: 4980 [2020-11-12 03:02:16,174 INFO L226 Difference]: Without dead ends: 4285 [2020-11-12 03:02:16,176 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=655, Invalid=2537, Unknown=0, NotChecked=0, Total=3192 [2020-11-12 03:02:16,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2020-11-12 03:02:16,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 2089. [2020-11-12 03:02:16,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 1977 states have (on average 1.5295902883156298) internal successors, (3024), 2088 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 3024 transitions. [2020-11-12 03:02:16,245 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 3024 transitions. Word has length 53 [2020-11-12 03:02:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:16,245 INFO L481 AbstractCegarLoop]: Abstraction has 2089 states and 3024 transitions. [2020-11-12 03:02:16,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 3024 transitions. [2020-11-12 03:02:16,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:16,249 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:16,249 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:16,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-12 03:02:16,463 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:16,464 INFO L82 PathProgramCache]: Analyzing trace with hash -909394442, now seen corresponding path program 7 times [2020-11-12 03:02:16,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:16,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680009274] [2020-11-12 03:02:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:16,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680009274] [2020-11-12 03:02:16,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525485127] [2020-11-12 03:02:16,706 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 [2020-11-12 03:02:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:16,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:16,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:16,951 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:16,994 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:17,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:17,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 03:02:17,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56792839] [2020-11-12 03:02:17,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 03:02:17,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:17,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 03:02:17,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-11-12 03:02:17,030 INFO L87 Difference]: Start difference. First operand 2089 states and 3024 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:18,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:18,956 INFO L93 Difference]: Finished difference Result 6121 states and 9932 transitions. [2020-11-12 03:02:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-12 03:02:18,957 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:18,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:18,968 INFO L225 Difference]: With dead ends: 6121 [2020-11-12 03:02:18,968 INFO L226 Difference]: Without dead ends: 4959 [2020-11-12 03:02:18,970 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=803, Invalid=2979, Unknown=0, NotChecked=0, Total=3782 [2020-11-12 03:02:18,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2020-11-12 03:02:19,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 2534. [2020-11-12 03:02:19,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2422 states have (on average 1.5532617671345994) internal successors, (3762), 2533 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 3762 transitions. [2020-11-12 03:02:19,065 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 3762 transitions. Word has length 53 [2020-11-12 03:02:19,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:19,066 INFO L481 AbstractCegarLoop]: Abstraction has 2534 states and 3762 transitions. [2020-11-12 03:02:19,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 3762 transitions. [2020-11-12 03:02:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:19,070 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:19,070 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:19,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-12 03:02:19,285 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:19,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:19,286 INFO L82 PathProgramCache]: Analyzing trace with hash 76691020, now seen corresponding path program 8 times [2020-11-12 03:02:19,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:19,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798245910] [2020-11-12 03:02:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:19,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798245910] [2020-11-12 03:02:19,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116630321] [2020-11-12 03:02:19,442 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:19,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:19,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:19,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:19,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:19,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:19,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:19,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:19,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435980837] [2020-11-12 03:02:19,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:19,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:19,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:19,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:19,722 INFO L87 Difference]: Start difference. First operand 2534 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:20,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:20,481 INFO L93 Difference]: Finished difference Result 4317 states and 6952 transitions. [2020-11-12 03:02:20,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-12 03:02:20,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:20,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:20,489 INFO L225 Difference]: With dead ends: 4317 [2020-11-12 03:02:20,489 INFO L226 Difference]: Without dead ends: 4165 [2020-11-12 03:02:20,490 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 03:02:20,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2020-11-12 03:02:20,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 2624. [2020-11-12 03:02:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2512 states have (on average 1.5636942675159236) internal successors, (3928), 2623 states have internal predecessors, (3928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 3928 transitions. [2020-11-12 03:02:20,548 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 3928 transitions. Word has length 53 [2020-11-12 03:02:20,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:20,548 INFO L481 AbstractCegarLoop]: Abstraction has 2624 states and 3928 transitions. [2020-11-12 03:02:20,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:20,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 3928 transitions. [2020-11-12 03:02:20,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:20,553 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:20,553 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:20,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:20,768 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:20,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:20,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1444060948, now seen corresponding path program 9 times [2020-11-12 03:02:20,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:20,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964663376] [2020-11-12 03:02:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:20,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964663376] [2020-11-12 03:02:20,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816971443] [2020-11-12 03:02:20,923 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:20,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 03:02:20,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:20,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:20,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:21,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:21,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:21,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:21,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850431093] [2020-11-12 03:02:21,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:21,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:21,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:21,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:21,233 INFO L87 Difference]: Start difference. First operand 2624 states and 3928 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:22,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:22,239 INFO L93 Difference]: Finished difference Result 4396 states and 7046 transitions. [2020-11-12 03:02:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-12 03:02:22,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:22,245 INFO L225 Difference]: With dead ends: 4396 [2020-11-12 03:02:22,245 INFO L226 Difference]: Without dead ends: 4244 [2020-11-12 03:02:22,246 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2020-11-12 03:02:22,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4244 states. [2020-11-12 03:02:22,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4244 to 2656. [2020-11-12 03:02:22,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2544 states have (on average 1.5656446540880504) internal successors, (3983), 2655 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:22,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 3983 transitions. [2020-11-12 03:02:22,304 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 3983 transitions. Word has length 53 [2020-11-12 03:02:22,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:22,304 INFO L481 AbstractCegarLoop]: Abstraction has 2656 states and 3983 transitions. [2020-11-12 03:02:22,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:22,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 3983 transitions. [2020-11-12 03:02:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:22,309 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:22,309 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:22,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:22,525 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:22,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:22,526 INFO L82 PathProgramCache]: Analyzing trace with hash -813661782, now seen corresponding path program 10 times [2020-11-12 03:02:22,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:22,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026259228] [2020-11-12 03:02:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:22,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026259228] [2020-11-12 03:02:22,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954253482] [2020-11-12 03:02:22,685 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:22,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:02:22,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:22,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:02:22,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:22,906 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:22,963 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:23,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:23,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 03:02:23,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395241715] [2020-11-12 03:02:23,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 03:02:23,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:23,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 03:02:23,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-11-12 03:02:23,009 INFO L87 Difference]: Start difference. First operand 2656 states and 3983 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:24,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:24,771 INFO L93 Difference]: Finished difference Result 6004 states and 9887 transitions. [2020-11-12 03:02:24,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-12 03:02:24,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:24,778 INFO L225 Difference]: With dead ends: 6004 [2020-11-12 03:02:24,779 INFO L226 Difference]: Without dead ends: 5404 [2020-11-12 03:02:24,780 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=739, Invalid=2683, Unknown=0, NotChecked=0, Total=3422 [2020-11-12 03:02:24,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5404 states. [2020-11-12 03:02:24,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5404 to 2654. [2020-11-12 03:02:24,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2542 states have (on average 1.5641227380015736) internal successors, (3976), 2653 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:24,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3976 transitions. [2020-11-12 03:02:24,841 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3976 transitions. Word has length 53 [2020-11-12 03:02:24,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:24,842 INFO L481 AbstractCegarLoop]: Abstraction has 2654 states and 3976 transitions. [2020-11-12 03:02:24,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:24,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3976 transitions. [2020-11-12 03:02:24,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:24,847 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:24,847 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:25,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:25,062 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:25,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:25,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1714969812, now seen corresponding path program 11 times [2020-11-12 03:02:25,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:25,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958720280] [2020-11-12 03:02:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:25,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958720280] [2020-11-12 03:02:25,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976571985] [2020-11-12 03:02:25,201 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:25,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 03:02:25,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:25,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:25,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:25,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:25,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:25,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:25,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651818128] [2020-11-12 03:02:25,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:25,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:25,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:25,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:25,483 INFO L87 Difference]: Start difference. First operand 2654 states and 3976 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:26,016 INFO L93 Difference]: Finished difference Result 4322 states and 7008 transitions. [2020-11-12 03:02:26,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-12 03:02:26,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:26,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:26,021 INFO L225 Difference]: With dead ends: 4322 [2020-11-12 03:02:26,021 INFO L226 Difference]: Without dead ends: 4170 [2020-11-12 03:02:26,022 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2020-11-12 03:02:26,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-11-12 03:02:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 2679. [2020-11-12 03:02:26,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2679 states, 2567 states have (on average 1.5703155434359175) internal successors, (4031), 2678 states have internal predecessors, (4031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:26,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2679 states to 2679 states and 4031 transitions. [2020-11-12 03:02:26,074 INFO L78 Accepts]: Start accepts. Automaton has 2679 states and 4031 transitions. Word has length 53 [2020-11-12 03:02:26,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:26,074 INFO L481 AbstractCegarLoop]: Abstraction has 2679 states and 4031 transitions. [2020-11-12 03:02:26,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:26,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2679 states and 4031 transitions. [2020-11-12 03:02:26,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:26,078 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:26,079 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:26,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-12 03:02:26,292 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash -318040390, now seen corresponding path program 2 times [2020-11-12 03:02:26,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:26,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772743184] [2020-11-12 03:02:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:26,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772743184] [2020-11-12 03:02:26,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015304939] [2020-11-12 03:02:26,462 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:26,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:26,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:26,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:26,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:26,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:26,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:26,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:26,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:26,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148754909] [2020-11-12 03:02:26,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:26,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:26,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:26,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:26,741 INFO L87 Difference]: Start difference. First operand 2679 states and 4031 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:27,990 INFO L93 Difference]: Finished difference Result 5296 states and 8512 transitions. [2020-11-12 03:02:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 03:02:27,991 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:27,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:27,996 INFO L225 Difference]: With dead ends: 5296 [2020-11-12 03:02:27,996 INFO L226 Difference]: Without dead ends: 4872 [2020-11-12 03:02:27,997 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2020-11-12 03:02:28,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2020-11-12 03:02:28,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 2729. [2020-11-12 03:02:28,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2729 states, 2617 states have (on average 1.584256782575468) internal successors, (4146), 2728 states have internal predecessors, (4146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:28,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2729 states to 2729 states and 4146 transitions. [2020-11-12 03:02:28,061 INFO L78 Accepts]: Start accepts. Automaton has 2729 states and 4146 transitions. Word has length 53 [2020-11-12 03:02:28,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:28,061 INFO L481 AbstractCegarLoop]: Abstraction has 2729 states and 4146 transitions. [2020-11-12 03:02:28,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:28,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2729 states and 4146 transitions. [2020-11-12 03:02:28,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:28,065 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:28,066 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:28,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-12 03:02:28,282 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:28,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:28,282 INFO L82 PathProgramCache]: Analyzing trace with hash 503163160, now seen corresponding path program 12 times [2020-11-12 03:02:28,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:28,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720004287] [2020-11-12 03:02:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:28,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720004287] [2020-11-12 03:02:28,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734526534] [2020-11-12 03:02:28,441 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:28,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 03:02:28,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:28,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:28,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:28,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:28,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:28,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-12 03:02:28,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694545758] [2020-11-12 03:02:28,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 03:02:28,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:28,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 03:02:28,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-11-12 03:02:28,701 INFO L87 Difference]: Start difference. First operand 2729 states and 4146 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:29,398 INFO L93 Difference]: Finished difference Result 4546 states and 7358 transitions. [2020-11-12 03:02:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 03:02:29,399 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:29,404 INFO L225 Difference]: With dead ends: 4546 [2020-11-12 03:02:29,404 INFO L226 Difference]: Without dead ends: 4394 [2020-11-12 03:02:29,405 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-11-12 03:02:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4394 states. [2020-11-12 03:02:29,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4394 to 2696. [2020-11-12 03:02:29,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2584 states have (on average 1.5770123839009287) internal successors, (4075), 2695 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 4075 transitions. [2020-11-12 03:02:29,461 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 4075 transitions. Word has length 53 [2020-11-12 03:02:29,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:29,462 INFO L481 AbstractCegarLoop]: Abstraction has 2696 states and 4075 transitions. [2020-11-12 03:02:29,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 4075 transitions. [2020-11-12 03:02:29,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-12 03:02:29,466 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:29,466 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:29,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-12 03:02:29,680 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:29,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:29,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1754559570, now seen corresponding path program 13 times [2020-11-12 03:02:29,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:29,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295598426] [2020-11-12 03:02:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:29,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:29,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295598426] [2020-11-12 03:02:29,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370567755] [2020-11-12 03:02:29,886 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:29,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 03:02:29,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:30,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:30,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:30,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:30,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-11-12 03:02:30,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665263736] [2020-11-12 03:02:30,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 03:02:30,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:30,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 03:02:30,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-11-12 03:02:30,143 INFO L87 Difference]: Start difference. First operand 2696 states and 4075 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:31,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:31,578 INFO L93 Difference]: Finished difference Result 6372 states and 10555 transitions. [2020-11-12 03:02:31,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-12 03:02:31,578 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-12 03:02:31,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:31,584 INFO L225 Difference]: With dead ends: 6372 [2020-11-12 03:02:31,585 INFO L226 Difference]: Without dead ends: 5772 [2020-11-12 03:02:31,586 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=681, Invalid=2399, Unknown=0, NotChecked=0, Total=3080 [2020-11-12 03:02:31,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2020-11-12 03:02:31,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 2704. [2020-11-12 03:02:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2704 states, 2592 states have (on average 1.5783179012345678) internal successors, (4091), 2703 states have internal predecessors, (4091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:31,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 4091 transitions. [2020-11-12 03:02:31,652 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 4091 transitions. Word has length 53 [2020-11-12 03:02:31,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:31,652 INFO L481 AbstractCegarLoop]: Abstraction has 2704 states and 4091 transitions. [2020-11-12 03:02:31,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:31,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 4091 transitions. [2020-11-12 03:02:31,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:31,657 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:31,657 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:31,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-12 03:02:31,872 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:31,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:31,873 INFO L82 PathProgramCache]: Analyzing trace with hash 280002180, now seen corresponding path program 3 times [2020-11-12 03:02:31,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:31,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805434165] [2020-11-12 03:02:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:32,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805434165] [2020-11-12 03:02:32,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330343331] [2020-11-12 03:02:32,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:32,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-12 03:02:32,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:32,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:32,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:32,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:32,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:32,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:32,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:32,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008041100] [2020-11-12 03:02:32,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:32,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:32,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:32,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:32,446 INFO L87 Difference]: Start difference. First operand 2704 states and 4091 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:32,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:32,975 INFO L93 Difference]: Finished difference Result 4252 states and 6484 transitions. [2020-11-12 03:02:32,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 03:02:32,975 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:32,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:32,980 INFO L225 Difference]: With dead ends: 4252 [2020-11-12 03:02:32,980 INFO L226 Difference]: Without dead ends: 3708 [2020-11-12 03:02:32,980 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2020-11-12 03:02:32,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2020-11-12 03:02:33,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 2714. [2020-11-12 03:02:33,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2602 states have (on average 1.580707148347425) internal successors, (4113), 2713 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:33,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 4113 transitions. [2020-11-12 03:02:33,042 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 4113 transitions. Word has length 58 [2020-11-12 03:02:33,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:33,043 INFO L481 AbstractCegarLoop]: Abstraction has 2714 states and 4113 transitions. [2020-11-12 03:02:33,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:33,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 4113 transitions. [2020-11-12 03:02:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:33,048 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:33,048 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:33,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-12 03:02:33,262 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:33,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:33,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1577441719, now seen corresponding path program 4 times [2020-11-12 03:02:33,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:33,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249888809] [2020-11-12 03:02:33,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:33,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249888809] [2020-11-12 03:02:33,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098540636] [2020-11-12 03:02:33,519 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:33,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:02:33,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:33,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 03:02:33,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:33,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:33,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:33,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:33,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:33,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654565925] [2020-11-12 03:02:33,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:33,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:33,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:33,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:33,893 INFO L87 Difference]: Start difference. First operand 2714 states and 4113 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:34,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:34,913 INFO L93 Difference]: Finished difference Result 5703 states and 9365 transitions. [2020-11-12 03:02:34,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-12 03:02:34,913 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:34,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:34,919 INFO L225 Difference]: With dead ends: 5703 [2020-11-12 03:02:34,919 INFO L226 Difference]: Without dead ends: 5103 [2020-11-12 03:02:34,920 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=405, Invalid=1575, Unknown=0, NotChecked=0, Total=1980 [2020-11-12 03:02:34,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5103 states. [2020-11-12 03:02:34,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5103 to 2739. [2020-11-12 03:02:34,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2627 states have (on average 1.5751808146174344) internal successors, (4138), 2738 states have internal predecessors, (4138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:34,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 4138 transitions. [2020-11-12 03:02:34,970 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 4138 transitions. Word has length 58 [2020-11-12 03:02:34,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:34,970 INFO L481 AbstractCegarLoop]: Abstraction has 2739 states and 4138 transitions. [2020-11-12 03:02:34,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:34,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 4138 transitions. [2020-11-12 03:02:34,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:34,975 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:34,975 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:35,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:35,190 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:35,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:35,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2124442581, now seen corresponding path program 14 times [2020-11-12 03:02:35,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:35,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793851323] [2020-11-12 03:02:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:35,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793851323] [2020-11-12 03:02:35,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275656966] [2020-11-12 03:02:35,394 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:35,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:35,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:35,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:35,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:35,804 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:35,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:35,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:35,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138819450] [2020-11-12 03:02:35,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:35,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:35,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:35,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:35,823 INFO L87 Difference]: Start difference. First operand 2739 states and 4138 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:38,584 INFO L93 Difference]: Finished difference Result 4716 states and 7690 transitions. [2020-11-12 03:02:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-12 03:02:38,585 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:38,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:38,591 INFO L225 Difference]: With dead ends: 4716 [2020-11-12 03:02:38,591 INFO L226 Difference]: Without dead ends: 4564 [2020-11-12 03:02:38,592 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=349, Invalid=1291, Unknown=0, NotChecked=0, Total=1640 [2020-11-12 03:02:38,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4564 states. [2020-11-12 03:02:38,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4564 to 2744. [2020-11-12 03:02:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2632 states have (on average 1.5782674772036474) internal successors, (4154), 2743 states have internal predecessors, (4154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:38,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 4154 transitions. [2020-11-12 03:02:38,647 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 4154 transitions. Word has length 58 [2020-11-12 03:02:38,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:38,648 INFO L481 AbstractCegarLoop]: Abstraction has 2744 states and 4154 transitions. [2020-11-12 03:02:38,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 4154 transitions. [2020-11-12 03:02:38,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:38,654 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:38,654 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:38,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-12 03:02:38,867 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:38,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:38,868 INFO L82 PathProgramCache]: Analyzing trace with hash -683209685, now seen corresponding path program 15 times [2020-11-12 03:02:38,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:38,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140009478] [2020-11-12 03:02:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:39,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140009478] [2020-11-12 03:02:39,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685822846] [2020-11-12 03:02:39,068 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:39,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 03:02:39,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:39,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:39,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:39,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:39,476 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:39,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:39,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:39,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023999976] [2020-11-12 03:02:39,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:39,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:39,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:39,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:39,518 INFO L87 Difference]: Start difference. First operand 2744 states and 4154 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:41,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:41,568 INFO L93 Difference]: Finished difference Result 6164 states and 10143 transitions. [2020-11-12 03:02:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-12 03:02:41,569 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:41,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:41,575 INFO L225 Difference]: With dead ends: 6164 [2020-11-12 03:02:41,575 INFO L226 Difference]: Without dead ends: 5564 [2020-11-12 03:02:41,577 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=720, Invalid=2702, Unknown=0, NotChecked=0, Total=3422 [2020-11-12 03:02:41,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2020-11-12 03:02:41,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 2739. [2020-11-12 03:02:41,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2627 states have (on average 1.5751808146174344) internal successors, (4138), 2738 states have internal predecessors, (4138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 4138 transitions. [2020-11-12 03:02:41,636 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 4138 transitions. Word has length 58 [2020-11-12 03:02:41,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:41,636 INFO L481 AbstractCegarLoop]: Abstraction has 2739 states and 4138 transitions. [2020-11-12 03:02:41,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:41,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 4138 transitions. [2020-11-12 03:02:41,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:41,639 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:41,639 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:41,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-12 03:02:41,840 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:41,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:41,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1174241049, now seen corresponding path program 16 times [2020-11-12 03:02:41,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:41,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304174047] [2020-11-12 03:02:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:42,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304174047] [2020-11-12 03:02:42,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531510124] [2020-11-12 03:02:42,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:42,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:02:42,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:42,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 03:02:42,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:42,352 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:42,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:42,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:42,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:42,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:42,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:42,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816362036] [2020-11-12 03:02:42,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:42,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:42,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:42,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:42,491 INFO L87 Difference]: Start difference. First operand 2739 states and 4138 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:44,959 INFO L93 Difference]: Finished difference Result 6399 states and 10521 transitions. [2020-11-12 03:02:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-12 03:02:44,960 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:44,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:44,966 INFO L225 Difference]: With dead ends: 6399 [2020-11-12 03:02:44,966 INFO L226 Difference]: Without dead ends: 5799 [2020-11-12 03:02:44,968 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=961, Invalid=3461, Unknown=0, NotChecked=0, Total=4422 [2020-11-12 03:02:44,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5799 states. [2020-11-12 03:02:45,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5799 to 2874. [2020-11-12 03:02:45,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2874 states, 2762 states have (on average 1.5847212165097755) internal successors, (4377), 2873 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:45,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2874 states to 2874 states and 4377 transitions. [2020-11-12 03:02:45,036 INFO L78 Accepts]: Start accepts. Automaton has 2874 states and 4377 transitions. Word has length 58 [2020-11-12 03:02:45,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:45,036 INFO L481 AbstractCegarLoop]: Abstraction has 2874 states and 4377 transitions. [2020-11-12 03:02:45,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:45,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2874 states and 4377 transitions. [2020-11-12 03:02:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:45,041 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:45,041 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:45,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:45,255 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:45,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:45,255 INFO L82 PathProgramCache]: Analyzing trace with hash -188155587, now seen corresponding path program 17 times [2020-11-12 03:02:45,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:45,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865342270] [2020-11-12 03:02:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:45,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865342270] [2020-11-12 03:02:45,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996921360] [2020-11-12 03:02:45,465 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:45,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 03:02:45,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:45,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:45,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:45,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:45,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:45,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:45,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:45,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:45,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602875170] [2020-11-12 03:02:45,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:45,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:45,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:45,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:45,890 INFO L87 Difference]: Start difference. First operand 2874 states and 4377 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:47,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:47,030 INFO L93 Difference]: Finished difference Result 4757 states and 7836 transitions. [2020-11-12 03:02:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-12 03:02:47,030 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:47,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:47,035 INFO L225 Difference]: With dead ends: 4757 [2020-11-12 03:02:47,035 INFO L226 Difference]: Without dead ends: 4605 [2020-11-12 03:02:47,036 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=387, Invalid=1419, Unknown=0, NotChecked=0, Total=1806 [2020-11-12 03:02:47,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2020-11-12 03:02:47,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 2874. [2020-11-12 03:02:47,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2874 states, 2762 states have (on average 1.5847212165097755) internal successors, (4377), 2873 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:47,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2874 states to 2874 states and 4377 transitions. [2020-11-12 03:02:47,079 INFO L78 Accepts]: Start accepts. Automaton has 2874 states and 4377 transitions. Word has length 58 [2020-11-12 03:02:47,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:47,079 INFO L481 AbstractCegarLoop]: Abstraction has 2874 states and 4377 transitions. [2020-11-12 03:02:47,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:47,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2874 states and 4377 transitions. [2020-11-12 03:02:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:47,082 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:47,082 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:47,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:47,285 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:47,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:47,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1179214341, now seen corresponding path program 18 times [2020-11-12 03:02:47,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:47,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313539327] [2020-11-12 03:02:47,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:47,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313539327] [2020-11-12 03:02:47,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234108564] [2020-11-12 03:02:47,451 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:47,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 03:02:47,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:47,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:47,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:47,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:47,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:47,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:47,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:47,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:47,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556939935] [2020-11-12 03:02:47,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:47,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:47,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:47,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:47,898 INFO L87 Difference]: Start difference. First operand 2874 states and 4377 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:49,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:49,263 INFO L93 Difference]: Finished difference Result 4757 states and 7738 transitions. [2020-11-12 03:02:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-12 03:02:49,264 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:49,270 INFO L225 Difference]: With dead ends: 4757 [2020-11-12 03:02:49,270 INFO L226 Difference]: Without dead ends: 4605 [2020-11-12 03:02:49,271 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=490, Invalid=1672, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 03:02:49,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2020-11-12 03:02:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 2879. [2020-11-12 03:02:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2767 states have (on average 1.587640043368269) internal successors, (4393), 2878 states have internal predecessors, (4393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:49,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 4393 transitions. [2020-11-12 03:02:49,311 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 4393 transitions. Word has length 58 [2020-11-12 03:02:49,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:49,312 INFO L481 AbstractCegarLoop]: Abstraction has 2879 states and 4393 transitions. [2020-11-12 03:02:49,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:49,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 4393 transitions. [2020-11-12 03:02:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:49,315 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:49,315 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:49,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-12 03:02:49,516 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:49,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1078508389, now seen corresponding path program 19 times [2020-11-12 03:02:49,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:49,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962241934] [2020-11-12 03:02:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:49,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962241934] [2020-11-12 03:02:49,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188156112] [2020-11-12 03:02:49,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:49,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:49,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:50,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:50,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:50,034 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:50,165 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:50,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:50,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:50,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204197438] [2020-11-12 03:02:50,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:50,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:50,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:50,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:50,225 INFO L87 Difference]: Start difference. First operand 2879 states and 4393 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:52,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:52,764 INFO L93 Difference]: Finished difference Result 6329 states and 10415 transitions. [2020-11-12 03:02:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-12 03:02:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:52,777 INFO L225 Difference]: With dead ends: 6329 [2020-11-12 03:02:52,777 INFO L226 Difference]: Without dead ends: 5729 [2020-11-12 03:02:52,779 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=831, Invalid=3075, Unknown=0, NotChecked=0, Total=3906 [2020-11-12 03:02:52,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5729 states. [2020-11-12 03:02:52,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5729 to 2744. [2020-11-12 03:02:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2632 states have (on average 1.5729483282674772) internal successors, (4140), 2743 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:52,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 4140 transitions. [2020-11-12 03:02:52,827 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 4140 transitions. Word has length 58 [2020-11-12 03:02:52,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:52,828 INFO L481 AbstractCegarLoop]: Abstraction has 2744 states and 4140 transitions. [2020-11-12 03:02:52,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:52,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 4140 transitions. [2020-11-12 03:02:52,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:52,831 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:52,831 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:53,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:53,032 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:53,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:53,033 INFO L82 PathProgramCache]: Analyzing trace with hash 443924589, now seen corresponding path program 20 times [2020-11-12 03:02:53,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:53,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213132009] [2020-11-12 03:02:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:53,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213132009] [2020-11-12 03:02:53,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923386817] [2020-11-12 03:02:53,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:53,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:02:53,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:53,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:53,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:53,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:53,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:53,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:53,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:53,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765603369] [2020-11-12 03:02:53,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:53,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:53,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:53,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:53,617 INFO L87 Difference]: Start difference. First operand 2744 states and 4140 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:56,321 INFO L93 Difference]: Finished difference Result 7363 states and 12174 transitions. [2020-11-12 03:02:56,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-12 03:02:56,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:56,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:56,330 INFO L225 Difference]: With dead ends: 7363 [2020-11-12 03:02:56,330 INFO L226 Difference]: Without dead ends: 6367 [2020-11-12 03:02:56,331 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1140, Invalid=4262, Unknown=0, NotChecked=0, Total=5402 [2020-11-12 03:02:56,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2020-11-12 03:02:56,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 3082. [2020-11-12 03:02:56,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 2970 states have (on average 1.582154882154882) internal successors, (4699), 3081 states have internal predecessors, (4699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4699 transitions. [2020-11-12 03:02:56,380 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4699 transitions. Word has length 58 [2020-11-12 03:02:56,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:56,381 INFO L481 AbstractCegarLoop]: Abstraction has 3082 states and 4699 transitions. [2020-11-12 03:02:56,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:56,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4699 transitions. [2020-11-12 03:02:56,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:56,384 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:56,384 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:56,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-12 03:02:56,585 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:56,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:56,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1662471653, now seen corresponding path program 21 times [2020-11-12 03:02:56,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:56,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092454545] [2020-11-12 03:02:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:56,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092454545] [2020-11-12 03:02:56,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471200068] [2020-11-12 03:02:56,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:56,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 03:02:56,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:56,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:02:56,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:57,160 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:57,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:57,164 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:57,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:57,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:57,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730920071] [2020-11-12 03:02:57,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:57,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:57,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:57,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:57,219 INFO L87 Difference]: Start difference. First operand 3082 states and 4699 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:58,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:02:58,930 INFO L93 Difference]: Finished difference Result 5636 states and 9438 transitions. [2020-11-12 03:02:58,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-12 03:02:58,931 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:02:58,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:02:58,937 INFO L225 Difference]: With dead ends: 5636 [2020-11-12 03:02:58,937 INFO L226 Difference]: Without dead ends: 5484 [2020-11-12 03:02:58,937 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=711, Invalid=2369, Unknown=0, NotChecked=0, Total=3080 [2020-11-12 03:02:58,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5484 states. [2020-11-12 03:02:58,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5484 to 3122. [2020-11-12 03:02:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3122 states, 3010 states have (on average 1.5893687707641195) internal successors, (4784), 3121 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 4784 transitions. [2020-11-12 03:02:58,983 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 4784 transitions. Word has length 58 [2020-11-12 03:02:58,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:02:58,983 INFO L481 AbstractCegarLoop]: Abstraction has 3122 states and 4784 transitions. [2020-11-12 03:02:58,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:02:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 4784 transitions. [2020-11-12 03:02:58,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:02:58,986 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:02:58,986 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:02:59,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:59,187 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:02:59,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:02:59,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1976176429, now seen corresponding path program 22 times [2020-11-12 03:02:59,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:02:59,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285701169] [2020-11-12 03:02:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:02:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:02:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:59,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285701169] [2020-11-12 03:02:59,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279264276] [2020-11-12 03:02:59,400 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:02:59,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:02:59,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:02:59,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 03:02:59,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:02:59,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:02:59,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:59,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:59,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:02:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:02:59,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:02:59,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:02:59,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861869082] [2020-11-12 03:02:59,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:02:59,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:02:59,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:02:59,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:02:59,826 INFO L87 Difference]: Start difference. First operand 3122 states and 4784 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:03,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:03,087 INFO L93 Difference]: Finished difference Result 8200 states and 13775 transitions. [2020-11-12 03:03:03,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-11-12 03:03:03,088 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:03,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:03,096 INFO L225 Difference]: With dead ends: 8200 [2020-11-12 03:03:03,097 INFO L226 Difference]: Without dead ends: 7600 [2020-11-12 03:03:03,097 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1335, Invalid=4671, Unknown=0, NotChecked=0, Total=6006 [2020-11-12 03:03:03,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7600 states. [2020-11-12 03:03:03,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7600 to 3232. [2020-11-12 03:03:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3232 states, 3120 states have (on average 1.5932692307692307) internal successors, (4971), 3231 states have internal predecessors, (4971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3232 states to 3232 states and 4971 transitions. [2020-11-12 03:03:03,158 INFO L78 Accepts]: Start accepts. Automaton has 3232 states and 4971 transitions. Word has length 58 [2020-11-12 03:03:03,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:03,158 INFO L481 AbstractCegarLoop]: Abstraction has 3232 states and 4971 transitions. [2020-11-12 03:03:03,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3232 states and 4971 transitions. [2020-11-12 03:03:03,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:03,162 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:03,162 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:03,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-12 03:03:03,363 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:03,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:03,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1979816419, now seen corresponding path program 23 times [2020-11-12 03:03:03,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:03,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079000631] [2020-11-12 03:03:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:03,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079000631] [2020-11-12 03:03:03,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985704415] [2020-11-12 03:03:03,572 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:03,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 03:03:03,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:03,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:03,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:03,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:03,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:03,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:03,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470159798] [2020-11-12 03:03:03,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:03,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:03,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:03,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:03,911 INFO L87 Difference]: Start difference. First operand 3232 states and 4971 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:05,162 INFO L93 Difference]: Finished difference Result 5998 states and 10174 transitions. [2020-11-12 03:03:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-12 03:03:05,164 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:05,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:05,170 INFO L225 Difference]: With dead ends: 5998 [2020-11-12 03:03:05,170 INFO L226 Difference]: Without dead ends: 5846 [2020-11-12 03:03:05,170 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2020-11-12 03:03:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2020-11-12 03:03:05,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 3322. [2020-11-12 03:03:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 3210 states have (on average 1.6093457943925233) internal successors, (5166), 3321 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 5166 transitions. [2020-11-12 03:03:05,225 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 5166 transitions. Word has length 58 [2020-11-12 03:03:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:05,225 INFO L481 AbstractCegarLoop]: Abstraction has 3322 states and 5166 transitions. [2020-11-12 03:03:05,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 5166 transitions. [2020-11-12 03:03:05,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:05,230 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:05,230 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:05,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-12 03:03:05,445 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:05,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:05,445 INFO L82 PathProgramCache]: Analyzing trace with hash 238316553, now seen corresponding path program 24 times [2020-11-12 03:03:05,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:05,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649051540] [2020-11-12 03:03:05,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:05,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649051540] [2020-11-12 03:03:05,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525073598] [2020-11-12 03:03:05,658 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:05,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 03:03:05,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:05,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:05,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:05,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:06,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:06,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:06,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089167829] [2020-11-12 03:03:06,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:06,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:06,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:06,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:06,007 INFO L87 Difference]: Start difference. First operand 3322 states and 5166 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:07,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:07,807 INFO L93 Difference]: Finished difference Result 6679 states and 11239 transitions. [2020-11-12 03:03:07,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-12 03:03:07,808 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:07,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:07,815 INFO L225 Difference]: With dead ends: 6679 [2020-11-12 03:03:07,815 INFO L226 Difference]: Without dead ends: 6527 [2020-11-12 03:03:07,816 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=724, Invalid=2468, Unknown=0, NotChecked=0, Total=3192 [2020-11-12 03:03:07,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6527 states. [2020-11-12 03:03:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6527 to 3359. [2020-11-12 03:03:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 3247 states have (on average 1.6039421004003696) internal successors, (5208), 3358 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 5208 transitions. [2020-11-12 03:03:07,890 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 5208 transitions. Word has length 58 [2020-11-12 03:03:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:07,890 INFO L481 AbstractCegarLoop]: Abstraction has 3359 states and 5208 transitions. [2020-11-12 03:03:07,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 5208 transitions. [2020-11-12 03:03:07,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:07,893 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:07,893 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:08,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-12 03:03:08,094 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:08,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:08,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2019406177, now seen corresponding path program 25 times [2020-11-12 03:03:08,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:08,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217746433] [2020-11-12 03:03:08,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:08,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217746433] [2020-11-12 03:03:08,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616904340] [2020-11-12 03:03:08,336 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:08,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:08,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:08,641 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:08,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:08,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:08,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207269669] [2020-11-12 03:03:08,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:08,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:08,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:08,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:08,656 INFO L87 Difference]: Start difference. First operand 3359 states and 5208 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:11,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:11,202 INFO L93 Difference]: Finished difference Result 8044 states and 13398 transitions. [2020-11-12 03:03:11,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-11-12 03:03:11,203 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:11,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:11,211 INFO L225 Difference]: With dead ends: 8044 [2020-11-12 03:03:11,211 INFO L226 Difference]: Without dead ends: 7444 [2020-11-12 03:03:11,212 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1206, Invalid=4344, Unknown=0, NotChecked=0, Total=5550 [2020-11-12 03:03:11,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7444 states. [2020-11-12 03:03:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7444 to 3432. [2020-11-12 03:03:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3432 states, 3320 states have (on average 1.6075301204819277) internal successors, (5337), 3431 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 5337 transitions. [2020-11-12 03:03:11,270 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 5337 transitions. Word has length 58 [2020-11-12 03:03:11,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:11,270 INFO L481 AbstractCegarLoop]: Abstraction has 3432 states and 5337 transitions. [2020-11-12 03:03:11,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 5337 transitions. [2020-11-12 03:03:11,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:11,276 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:11,276 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:11,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-12 03:03:11,491 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:11,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:11,491 INFO L82 PathProgramCache]: Analyzing trace with hash 2109468703, now seen corresponding path program 3 times [2020-11-12 03:03:11,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:11,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085246724] [2020-11-12 03:03:11,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:11,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085246724] [2020-11-12 03:03:11,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175249659] [2020-11-12 03:03:11,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:11,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-12 03:03:11,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:11,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:11,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:12,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:12,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:12,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:12,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739408448] [2020-11-12 03:03:12,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:12,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:12,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:12,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:12,069 INFO L87 Difference]: Start difference. First operand 3432 states and 5337 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:12,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:12,982 INFO L93 Difference]: Finished difference Result 5554 states and 9286 transitions. [2020-11-12 03:03:12,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-12 03:03:12,986 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:12,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:12,993 INFO L225 Difference]: With dead ends: 5554 [2020-11-12 03:03:12,993 INFO L226 Difference]: Without dead ends: 5402 [2020-11-12 03:03:12,993 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2020-11-12 03:03:13,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2020-11-12 03:03:13,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 3482. [2020-11-12 03:03:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3482 states, 3370 states have (on average 1.616320474777448) internal successors, (5447), 3481 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3482 states to 3482 states and 5447 transitions. [2020-11-12 03:03:13,051 INFO L78 Accepts]: Start accepts. Automaton has 3482 states and 5447 transitions. Word has length 58 [2020-11-12 03:03:13,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:13,051 INFO L481 AbstractCegarLoop]: Abstraction has 3482 states and 5447 transitions. [2020-11-12 03:03:13,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3482 states and 5447 transitions. [2020-11-12 03:03:13,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:13,056 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:13,056 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:13,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-12 03:03:13,264 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:13,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1016552829, now seen corresponding path program 26 times [2020-11-12 03:03:13,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:13,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73777983] [2020-11-12 03:03:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:13,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73777983] [2020-11-12 03:03:13,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219324172] [2020-11-12 03:03:13,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:13,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:03:13,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:13,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:13,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:13,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:13,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:13,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:13,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:13,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:13,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121034590] [2020-11-12 03:03:13,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:13,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:13,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:13,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:13,857 INFO L87 Difference]: Start difference. First operand 3482 states and 5447 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:14,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:14,819 INFO L93 Difference]: Finished difference Result 5700 states and 9566 transitions. [2020-11-12 03:03:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-12 03:03:14,820 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:14,826 INFO L225 Difference]: With dead ends: 5700 [2020-11-12 03:03:14,826 INFO L226 Difference]: Without dead ends: 5548 [2020-11-12 03:03:14,827 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2020-11-12 03:03:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5548 states. [2020-11-12 03:03:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5548 to 3507. [2020-11-12 03:03:14,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3507 states, 3395 states have (on average 1.620618556701031) internal successors, (5502), 3506 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3507 states to 3507 states and 5502 transitions. [2020-11-12 03:03:14,874 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 5502 transitions. Word has length 58 [2020-11-12 03:03:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:14,875 INFO L481 AbstractCegarLoop]: Abstraction has 3507 states and 5502 transitions. [2020-11-12 03:03:14,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:14,875 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 5502 transitions. [2020-11-12 03:03:14,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:14,878 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:14,879 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:15,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-12 03:03:15,080 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:15,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:15,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1142065091, now seen corresponding path program 27 times [2020-11-12 03:03:15,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:15,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679040114] [2020-11-12 03:03:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:15,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679040114] [2020-11-12 03:03:15,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845954128] [2020-11-12 03:03:15,305 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:15,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 03:03:15,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:15,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:15,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:15,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:15,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:15,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:15,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196173596] [2020-11-12 03:03:15,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:15,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:15,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:15,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:15,656 INFO L87 Difference]: Start difference. First operand 3507 states and 5502 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:16,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:16,320 INFO L93 Difference]: Finished difference Result 5321 states and 8803 transitions. [2020-11-12 03:03:16,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 03:03:16,321 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:16,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:16,327 INFO L225 Difference]: With dead ends: 5321 [2020-11-12 03:03:16,327 INFO L226 Difference]: Without dead ends: 5169 [2020-11-12 03:03:16,327 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2020-11-12 03:03:16,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5169 states. [2020-11-12 03:03:16,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5169 to 3482. [2020-11-12 03:03:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3482 states, 3370 states have (on average 1.616320474777448) internal successors, (5447), 3481 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3482 states to 3482 states and 5447 transitions. [2020-11-12 03:03:16,373 INFO L78 Accepts]: Start accepts. Automaton has 3482 states and 5447 transitions. Word has length 58 [2020-11-12 03:03:16,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:16,373 INFO L481 AbstractCegarLoop]: Abstraction has 3482 states and 5447 transitions. [2020-11-12 03:03:16,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3482 states and 5447 transitions. [2020-11-12 03:03:16,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:16,376 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:16,376 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:16,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-12 03:03:16,591 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:16,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1736471079, now seen corresponding path program 4 times [2020-11-12 03:03:16,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:16,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137908318] [2020-11-12 03:03:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:16,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137908318] [2020-11-12 03:03:16,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705028110] [2020-11-12 03:03:16,831 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:16,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:03:16,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:16,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 03:03:16,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:17,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:17,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:17,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:17,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:17,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481151748] [2020-11-12 03:03:17,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:17,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:17,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:17,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:17,207 INFO L87 Difference]: Start difference. First operand 3482 states and 5447 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:19,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:19,410 INFO L93 Difference]: Finished difference Result 7969 states and 13518 transitions. [2020-11-12 03:03:19,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-12 03:03:19,412 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:19,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:19,420 INFO L225 Difference]: With dead ends: 7969 [2020-11-12 03:03:19,420 INFO L226 Difference]: Without dead ends: 7274 [2020-11-12 03:03:19,420 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=966, Invalid=3456, Unknown=0, NotChecked=0, Total=4422 [2020-11-12 03:03:19,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2020-11-12 03:03:19,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 3577. [2020-11-12 03:03:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3577 states, 3465 states have (on average 1.6222222222222222) internal successors, (5621), 3576 states have internal predecessors, (5621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3577 states to 3577 states and 5621 transitions. [2020-11-12 03:03:19,481 INFO L78 Accepts]: Start accepts. Automaton has 3577 states and 5621 transitions. Word has length 58 [2020-11-12 03:03:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:19,481 INFO L481 AbstractCegarLoop]: Abstraction has 3577 states and 5621 transitions. [2020-11-12 03:03:19,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:19,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3577 states and 5621 transitions. [2020-11-12 03:03:19,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:19,486 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:19,486 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:19,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:19,701 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:19,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:19,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1980197543, now seen corresponding path program 28 times [2020-11-12 03:03:19,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:19,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827911257] [2020-11-12 03:03:19,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:19,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827911257] [2020-11-12 03:03:19,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710981417] [2020-11-12 03:03:19,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:19,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:03:19,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:19,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 03:03:19,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:20,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:20,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:20,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:20,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:20,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420380805] [2020-11-12 03:03:20,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:20,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:20,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:20,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:20,314 INFO L87 Difference]: Start difference. First operand 3577 states and 5621 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:22,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:22,681 INFO L93 Difference]: Finished difference Result 8325 states and 13991 transitions. [2020-11-12 03:03:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-12 03:03:22,682 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:22,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:22,690 INFO L225 Difference]: With dead ends: 8325 [2020-11-12 03:03:22,690 INFO L226 Difference]: Without dead ends: 7725 [2020-11-12 03:03:22,692 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=913, Invalid=3247, Unknown=0, NotChecked=0, Total=4160 [2020-11-12 03:03:22,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7725 states. [2020-11-12 03:03:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7725 to 3647. [2020-11-12 03:03:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3647 states, 3535 states have (on average 1.624045261669024) internal successors, (5741), 3646 states have internal predecessors, (5741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3647 states to 3647 states and 5741 transitions. [2020-11-12 03:03:22,751 INFO L78 Accepts]: Start accepts. Automaton has 3647 states and 5741 transitions. Word has length 58 [2020-11-12 03:03:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:22,752 INFO L481 AbstractCegarLoop]: Abstraction has 3647 states and 5741 transitions. [2020-11-12 03:03:22,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3647 states and 5741 transitions. [2020-11-12 03:03:22,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:22,754 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:22,755 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:22,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-12 03:03:22,955 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:22,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:22,956 INFO L82 PathProgramCache]: Analyzing trace with hash -379491259, now seen corresponding path program 29 times [2020-11-12 03:03:22,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:22,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160643713] [2020-11-12 03:03:22,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:23,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160643713] [2020-11-12 03:03:23,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460385777] [2020-11-12 03:03:23,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:23,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 03:03:23,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:23,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:23,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:23,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:23,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:23,518 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:23,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:23,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:23,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346724205] [2020-11-12 03:03:23,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:23,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:23,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:23,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:23,577 INFO L87 Difference]: Start difference. First operand 3647 states and 5741 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:24,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:24,599 INFO L93 Difference]: Finished difference Result 5877 states and 9905 transitions. [2020-11-12 03:03:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 03:03:24,600 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:24,606 INFO L225 Difference]: With dead ends: 5877 [2020-11-12 03:03:24,607 INFO L226 Difference]: Without dead ends: 5725 [2020-11-12 03:03:24,607 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2020-11-12 03:03:24,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5725 states. [2020-11-12 03:03:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5725 to 3622. [2020-11-12 03:03:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 3510 states have (on average 1.61994301994302) internal successors, (5686), 3621 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 5686 transitions. [2020-11-12 03:03:24,664 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 5686 transitions. Word has length 58 [2020-11-12 03:03:24,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:24,665 INFO L481 AbstractCegarLoop]: Abstraction has 3622 states and 5686 transitions. [2020-11-12 03:03:24,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:24,665 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 5686 transitions. [2020-11-12 03:03:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-12 03:03:24,668 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:24,668 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:24,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:24,869 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:24,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:24,870 INFO L82 PathProgramCache]: Analyzing trace with hash 618284571, now seen corresponding path program 30 times [2020-11-12 03:03:24,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:24,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683517586] [2020-11-12 03:03:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:25,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683517586] [2020-11-12 03:03:25,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902780097] [2020-11-12 03:03:25,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:25,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 03:03:25,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:25,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 03:03:25,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:25,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:25,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:25,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:25,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:25,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:25,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-12 03:03:25,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663082788] [2020-11-12 03:03:25,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 03:03:25,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:25,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 03:03:25,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-11-12 03:03:25,568 INFO L87 Difference]: Start difference. First operand 3622 states and 5686 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:28,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:28,376 INFO L93 Difference]: Finished difference Result 8488 states and 14344 transitions. [2020-11-12 03:03:28,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-12 03:03:28,377 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-12 03:03:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:28,386 INFO L225 Difference]: With dead ends: 8488 [2020-11-12 03:03:28,386 INFO L226 Difference]: Without dead ends: 7888 [2020-11-12 03:03:28,387 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1076, Invalid=4180, Unknown=0, NotChecked=0, Total=5256 [2020-11-12 03:03:28,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7888 states. [2020-11-12 03:03:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7888 to 3597. [2020-11-12 03:03:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3597 states, 3485 states have (on average 1.6157819225251076) internal successors, (5631), 3596 states have internal predecessors, (5631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 5631 transitions. [2020-11-12 03:03:28,452 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 5631 transitions. Word has length 58 [2020-11-12 03:03:28,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:28,453 INFO L481 AbstractCegarLoop]: Abstraction has 3597 states and 5631 transitions. [2020-11-12 03:03:28,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:28,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 5631 transitions. [2020-11-12 03:03:28,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:28,456 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:28,456 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:28,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-12 03:03:28,657 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:28,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:28,657 INFO L82 PathProgramCache]: Analyzing trace with hash -956807834, now seen corresponding path program 5 times [2020-11-12 03:03:28,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:28,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491458789] [2020-11-12 03:03:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:28,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491458789] [2020-11-12 03:03:28,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145775197] [2020-11-12 03:03:28,925 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:28,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-12 03:03:28,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:28,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:28,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:29,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:29,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:29,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:29,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:29,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493663629] [2020-11-12 03:03:29,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:29,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:29,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:29,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:03:29,386 INFO L87 Difference]: Start difference. First operand 3597 states and 5631 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:30,769 INFO L93 Difference]: Finished difference Result 6996 states and 11646 transitions. [2020-11-12 03:03:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-12 03:03:30,770 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:03:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:30,777 INFO L225 Difference]: With dead ends: 6996 [2020-11-12 03:03:30,777 INFO L226 Difference]: Without dead ends: 6396 [2020-11-12 03:03:30,778 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=482, Invalid=1870, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 03:03:30,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6396 states. [2020-11-12 03:03:30,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6396 to 3652. [2020-11-12 03:03:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3652 states, 3540 states have (on average 1.6124293785310735) internal successors, (5708), 3651 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3652 states to 3652 states and 5708 transitions. [2020-11-12 03:03:30,829 INFO L78 Accepts]: Start accepts. Automaton has 3652 states and 5708 transitions. Word has length 63 [2020-11-12 03:03:30,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:30,830 INFO L481 AbstractCegarLoop]: Abstraction has 3652 states and 5708 transitions. [2020-11-12 03:03:30,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:30,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3652 states and 5708 transitions. [2020-11-12 03:03:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:30,833 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:30,833 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:31,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:03:31,033 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:31,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:31,034 INFO L82 PathProgramCache]: Analyzing trace with hash 2017216476, now seen corresponding path program 31 times [2020-11-12 03:03:31,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:31,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279291258] [2020-11-12 03:03:31,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:31,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279291258] [2020-11-12 03:03:31,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68467927] [2020-11-12 03:03:31,289 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 [2020-11-12 03:03:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:31,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:31,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:31,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:31,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:31,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:31,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-12 03:03:31,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443953284] [2020-11-12 03:03:31,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 03:03:31,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:31,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 03:03:31,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-11-12 03:03:31,697 INFO L87 Difference]: Start difference. First operand 3652 states and 5708 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:33,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:33,709 INFO L93 Difference]: Finished difference Result 7257 states and 11832 transitions. [2020-11-12 03:03:33,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 03:03:33,710 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:03:33,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:33,718 INFO L225 Difference]: With dead ends: 7257 [2020-11-12 03:03:33,718 INFO L226 Difference]: Without dead ends: 6833 [2020-11-12 03:03:33,719 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=641, Invalid=2115, Unknown=0, NotChecked=0, Total=2756 [2020-11-12 03:03:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6833 states. [2020-11-12 03:03:33,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6833 to 3717. [2020-11-12 03:03:33,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3717 states, 3605 states have (on average 1.627739251040222) internal successors, (5868), 3716 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3717 states to 3717 states and 5868 transitions. [2020-11-12 03:03:33,777 INFO L78 Accepts]: Start accepts. Automaton has 3717 states and 5868 transitions. Word has length 63 [2020-11-12 03:03:33,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:33,777 INFO L481 AbstractCegarLoop]: Abstraction has 3717 states and 5868 transitions. [2020-11-12 03:03:33,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:33,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3717 states and 5868 transitions. [2020-11-12 03:03:33,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:33,780 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:33,781 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:33,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-12 03:03:33,981 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:33,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:33,982 INFO L82 PathProgramCache]: Analyzing trace with hash -409806972, now seen corresponding path program 32 times [2020-11-12 03:03:33,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:33,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234324839] [2020-11-12 03:03:33,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:34,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234324839] [2020-11-12 03:03:34,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771006708] [2020-11-12 03:03:34,274 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 [2020-11-12 03:03:34,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:03:34,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:34,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:34,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:34,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:34,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:34,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:34,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:34,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:34,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689114223] [2020-11-12 03:03:34,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:34,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:34,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:34,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:03:34,854 INFO L87 Difference]: Start difference. First operand 3717 states and 5868 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:03:36,117 INFO L93 Difference]: Finished difference Result 6257 states and 10455 transitions. [2020-11-12 03:03:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-12 03:03:36,118 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:03:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:03:36,124 INFO L225 Difference]: With dead ends: 6257 [2020-11-12 03:03:36,124 INFO L226 Difference]: Without dead ends: 6105 [2020-11-12 03:03:36,125 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=412, Invalid=1568, Unknown=0, NotChecked=0, Total=1980 [2020-11-12 03:03:36,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6105 states. [2020-11-12 03:03:36,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6105 to 3735. [2020-11-12 03:03:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3735 states, 3623 states have (on average 1.6251725089704665) internal successors, (5888), 3734 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3735 states to 3735 states and 5888 transitions. [2020-11-12 03:03:36,175 INFO L78 Accepts]: Start accepts. Automaton has 3735 states and 5888 transitions. Word has length 63 [2020-11-12 03:03:36,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:03:36,176 INFO L481 AbstractCegarLoop]: Abstraction has 3735 states and 5888 transitions. [2020-11-12 03:03:36,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:03:36,176 INFO L276 IsEmpty]: Start isEmpty. Operand 3735 states and 5888 transitions. [2020-11-12 03:03:36,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:03:36,179 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:03:36,179 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:03:36,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-12 03:03:36,379 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:03:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:03:36,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1077508058, now seen corresponding path program 33 times [2020-11-12 03:03:36,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:03:36,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376647156] [2020-11-12 03:03:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:03:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:03:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:36,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376647156] [2020-11-12 03:03:36,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771763386] [2020-11-12 03:03:36,640 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 [2020-11-12 03:03:36,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-12 03:03:36,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:03:36,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:03:36,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:03:37,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:03:43,296 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 22 [2020-11-12 03:03:43,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:03:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:03:43,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:03:43,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:03:43,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629751742] [2020-11-12 03:03:43,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:03:43,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:03:43,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:03:43,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=383, Unknown=2, NotChecked=0, Total=506 [2020-11-12 03:03:43,321 INFO L87 Difference]: Start difference. First operand 3735 states and 5888 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:04:18,928 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2020-11-12 03:05:42,185 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-11-12 03:07:01,586 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-11-12 03:07:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:07:45,182 INFO L93 Difference]: Finished difference Result 7997 states and 13344 transitions. [2020-11-12 03:07:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-12 03:07:45,185 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:07:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:07:45,195 INFO L225 Difference]: With dead ends: 7997 [2020-11-12 03:07:45,195 INFO L226 Difference]: Without dead ends: 7397 [2020-11-12 03:07:45,197 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 54.1s TimeCoverageRelationStatistics Valid=855, Invalid=3283, Unknown=22, NotChecked=0, Total=4160 [2020-11-12 03:07:45,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7397 states. [2020-11-12 03:07:45,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7397 to 3737. [2020-11-12 03:07:45,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3625 states have (on average 1.6297931034482758) internal successors, (5908), 3736 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:07:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 5908 transitions. [2020-11-12 03:07:45,274 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 5908 transitions. Word has length 63 [2020-11-12 03:07:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:07:45,274 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 5908 transitions. [2020-11-12 03:07:45,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:07:45,275 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 5908 transitions. [2020-11-12 03:07:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:07:45,279 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:07:45,279 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:07:45,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-12 03:07:45,480 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:07:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:07:45,481 INFO L82 PathProgramCache]: Analyzing trace with hash 586476694, now seen corresponding path program 34 times [2020-11-12 03:07:45,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:07:45,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804649223] [2020-11-12 03:07:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:07:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:07:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:07:45,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804649223] [2020-11-12 03:07:45,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451114103] [2020-11-12 03:07:45,843 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 [2020-11-12 03:07:45,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:07:45,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:07:45,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:07:45,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:07:46,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:07:46,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:07:46,404 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:07:46,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:07:46,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-12 03:07:46,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021755960] [2020-11-12 03:07:46,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 03:07:46,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:07:46,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 03:07:46,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-11-12 03:07:46,406 INFO L87 Difference]: Start difference. First operand 3737 states and 5908 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:07:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:07:49,933 INFO L93 Difference]: Finished difference Result 8060 states and 13260 transitions. [2020-11-12 03:07:49,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-12 03:07:49,936 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:07:49,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:07:49,946 INFO L225 Difference]: With dead ends: 8060 [2020-11-12 03:07:49,946 INFO L226 Difference]: Without dead ends: 7636 [2020-11-12 03:07:49,947 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=927, Invalid=2979, Unknown=0, NotChecked=0, Total=3906 [2020-11-12 03:07:49,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7636 states. [2020-11-12 03:07:50,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7636 to 3817. [2020-11-12 03:07:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3817 states, 3705 states have (on average 1.6442645074224023) internal successors, (6092), 3816 states have internal predecessors, (6092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:07:50,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3817 states to 3817 states and 6092 transitions. [2020-11-12 03:07:50,019 INFO L78 Accepts]: Start accepts. Automaton has 3817 states and 6092 transitions. Word has length 63 [2020-11-12 03:07:50,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:07:50,020 INFO L481 AbstractCegarLoop]: Abstraction has 3817 states and 6092 transitions. [2020-11-12 03:07:50,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:07:50,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3817 states and 6092 transitions. [2020-11-12 03:07:50,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:07:50,024 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:07:50,024 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:07:50,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-11-12 03:07:50,240 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:07:50,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:07:50,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1840546754, now seen corresponding path program 35 times [2020-11-12 03:07:50,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:07:50,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082583873] [2020-11-12 03:07:50,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:07:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:07:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:07:50,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082583873] [2020-11-12 03:07:50,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374962007] [2020-11-12 03:07:50,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:07:50,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 03:07:50,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:07:50,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:07:50,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:07:51,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:07:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:07:51,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:07:51,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:07:51,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87566114] [2020-11-12 03:07:51,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:07:51,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:07:51,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:07:51,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:07:51,437 INFO L87 Difference]: Start difference. First operand 3817 states and 6092 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:07:56,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:07:56,613 INFO L93 Difference]: Finished difference Result 7493 states and 12814 transitions. [2020-11-12 03:07:56,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-12 03:07:56,615 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:07:56,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:07:56,627 INFO L225 Difference]: With dead ends: 7493 [2020-11-12 03:07:56,627 INFO L226 Difference]: Without dead ends: 7253 [2020-11-12 03:07:56,628 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=694, Invalid=2612, Unknown=0, NotChecked=0, Total=3306 [2020-11-12 03:07:56,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7253 states. [2020-11-12 03:07:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7253 to 3890. [2020-11-12 03:07:56,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3778 states have (on average 1.6431974589730016) internal successors, (6208), 3889 states have internal predecessors, (6208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:07:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 6208 transitions. [2020-11-12 03:07:56,710 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 6208 transitions. Word has length 63 [2020-11-12 03:07:56,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:07:56,710 INFO L481 AbstractCegarLoop]: Abstraction has 3890 states and 6208 transitions. [2020-11-12 03:07:56,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:07:56,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 6208 transitions. [2020-11-12 03:07:56,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:07:56,714 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:07:56,715 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:07:56,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:07:56,916 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:07:56,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:07:56,916 INFO L82 PathProgramCache]: Analyzing trace with hash -353231724, now seen corresponding path program 36 times [2020-11-12 03:07:56,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:07:56,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640367562] [2020-11-12 03:07:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:07:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:07:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:07:57,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640367562] [2020-11-12 03:07:57,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609610369] [2020-11-12 03:07:57,256 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 [2020-11-12 03:07:57,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 03:07:57,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:07:57,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:07:57,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:08:01,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:02,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:08:02,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:08:02,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-12 03:08:02,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767604723] [2020-11-12 03:08:02,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 03:08:02,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:08:02,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 03:08:02,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=347, Unknown=2, NotChecked=0, Total=462 [2020-11-12 03:08:02,024 INFO L87 Difference]: Start difference. First operand 3890 states and 6208 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:05,421 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 41 [2020-11-12 03:08:10,164 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-12 03:08:16,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:08:16,828 INFO L93 Difference]: Finished difference Result 8102 states and 13344 transitions. [2020-11-12 03:08:16,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-12 03:08:16,830 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:08:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:08:16,840 INFO L225 Difference]: With dead ends: 8102 [2020-11-12 03:08:16,840 INFO L226 Difference]: Without dead ends: 7678 [2020-11-12 03:08:16,841 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=822, Invalid=2836, Unknown=2, NotChecked=0, Total=3660 [2020-11-12 03:08:16,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7678 states. [2020-11-12 03:08:16,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7678 to 3847. [2020-11-12 03:08:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3847 states, 3735 states have (on average 1.6417670682730923) internal successors, (6132), 3846 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:16,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3847 states to 3847 states and 6132 transitions. [2020-11-12 03:08:16,936 INFO L78 Accepts]: Start accepts. Automaton has 3847 states and 6132 transitions. Word has length 63 [2020-11-12 03:08:16,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:08:16,937 INFO L481 AbstractCegarLoop]: Abstraction has 3847 states and 6132 transitions. [2020-11-12 03:08:16,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:16,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3847 states and 6132 transitions. [2020-11-12 03:08:16,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:08:16,942 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:08:16,942 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:08:17,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:08:17,154 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:08:17,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:08:17,154 INFO L82 PathProgramCache]: Analyzing trace with hash 682209354, now seen corresponding path program 37 times [2020-11-12 03:08:17,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:08:17,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76890043] [2020-11-12 03:08:17,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:08:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:08:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:08:17,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76890043] [2020-11-12 03:08:17,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858615023] [2020-11-12 03:08:17,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:08:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:08:17,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:08:17,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:08:20,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:20,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:08:20,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:08:20,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:08:20,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-12 03:08:20,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495807993] [2020-11-12 03:08:20,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 03:08:20,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:08:20,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 03:08:20,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=343, Unknown=1, NotChecked=0, Total=462 [2020-11-12 03:08:20,464 INFO L87 Difference]: Start difference. First operand 3847 states and 6132 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:21,015 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 17 [2020-11-12 03:08:21,697 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 20 [2020-11-12 03:08:22,808 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-11-12 03:08:28,624 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-11-12 03:08:33,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:08:33,591 INFO L93 Difference]: Finished difference Result 7442 states and 12220 transitions. [2020-11-12 03:08:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-12 03:08:33,593 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:08:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:08:33,601 INFO L225 Difference]: With dead ends: 7442 [2020-11-12 03:08:33,602 INFO L226 Difference]: Without dead ends: 7018 [2020-11-12 03:08:33,602 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=889, Invalid=3016, Unknown=1, NotChecked=0, Total=3906 [2020-11-12 03:08:33,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7018 states. [2020-11-12 03:08:33,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7018 to 3847. [2020-11-12 03:08:33,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3847 states, 3735 states have (on average 1.6417670682730923) internal successors, (6132), 3846 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3847 states to 3847 states and 6132 transitions. [2020-11-12 03:08:33,662 INFO L78 Accepts]: Start accepts. Automaton has 3847 states and 6132 transitions. Word has length 63 [2020-11-12 03:08:33,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:08:33,662 INFO L481 AbstractCegarLoop]: Abstraction has 3847 states and 6132 transitions. [2020-11-12 03:08:33,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3847 states and 6132 transitions. [2020-11-12 03:08:33,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:08:33,665 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:08:33,666 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:08:33,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-11-12 03:08:33,880 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:08:33,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:08:33,880 INFO L82 PathProgramCache]: Analyzing trace with hash -2090324964, now seen corresponding path program 38 times [2020-11-12 03:08:33,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:08:33,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614716230] [2020-11-12 03:08:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:08:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:08:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:08:34,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614716230] [2020-11-12 03:08:34,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230681376] [2020-11-12 03:08:34,194 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 [2020-11-12 03:08:34,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:08:34,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:08:34,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:08:34,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:08:34,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:34,725 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:08:34,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:08:34,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-12 03:08:34,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399289874] [2020-11-12 03:08:34,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 03:08:34,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:08:34,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 03:08:34,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-11-12 03:08:34,738 INFO L87 Difference]: Start difference. First operand 3847 states and 6132 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:08:38,776 INFO L93 Difference]: Finished difference Result 7972 states and 13138 transitions. [2020-11-12 03:08:38,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-12 03:08:38,778 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:08:38,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:08:38,787 INFO L225 Difference]: With dead ends: 7972 [2020-11-12 03:08:38,788 INFO L226 Difference]: Without dead ends: 7548 [2020-11-12 03:08:38,788 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1050, Invalid=3372, Unknown=0, NotChecked=0, Total=4422 [2020-11-12 03:08:38,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7548 states. [2020-11-12 03:08:38,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7548 to 3927. [2020-11-12 03:08:38,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3927 states, 3815 states have (on average 1.655570117955439) internal successors, (6316), 3926 states have internal predecessors, (6316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:38,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 6316 transitions. [2020-11-12 03:08:38,855 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 6316 transitions. Word has length 63 [2020-11-12 03:08:38,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:08:38,856 INFO L481 AbstractCegarLoop]: Abstraction has 3927 states and 6316 transitions. [2020-11-12 03:08:38,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:38,856 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 6316 transitions. [2020-11-12 03:08:38,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:08:38,860 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:08:38,860 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:08:39,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:08:39,061 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:08:39,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:08:39,061 INFO L82 PathProgramCache]: Analyzing trace with hash -871777900, now seen corresponding path program 39 times [2020-11-12 03:08:39,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:08:39,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659124540] [2020-11-12 03:08:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:08:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:08:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:08:39,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659124540] [2020-11-12 03:08:39,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664570813] [2020-11-12 03:08:39,401 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 [2020-11-12 03:08:39,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 03:08:39,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:08:39,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:08:39,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:08:40,088 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:40,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:40,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:40,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:40,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:40,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:40,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:40,113 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:08:40,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:08:40,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:08:40,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732231632] [2020-11-12 03:08:40,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:08:40,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:08:40,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:08:40,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:08:40,225 INFO L87 Difference]: Start difference. First operand 3927 states and 6316 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:43,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:08:43,367 INFO L93 Difference]: Finished difference Result 7109 states and 12179 transitions. [2020-11-12 03:08:43,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-12 03:08:43,369 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:08:43,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:08:43,376 INFO L225 Difference]: With dead ends: 7109 [2020-11-12 03:08:43,376 INFO L226 Difference]: Without dead ends: 6957 [2020-11-12 03:08:43,376 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=778, Invalid=2762, Unknown=0, NotChecked=0, Total=3540 [2020-11-12 03:08:43,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6957 states. [2020-11-12 03:08:43,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6957 to 3981. [2020-11-12 03:08:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3981 states, 3869 states have (on average 1.6572757818557766) internal successors, (6412), 3980 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3981 states to 3981 states and 6412 transitions. [2020-11-12 03:08:43,453 INFO L78 Accepts]: Start accepts. Automaton has 3981 states and 6412 transitions. Word has length 63 [2020-11-12 03:08:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:08:43,453 INFO L481 AbstractCegarLoop]: Abstraction has 3981 states and 6412 transitions. [2020-11-12 03:08:43,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3981 states and 6412 transitions. [2020-11-12 03:08:43,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:08:43,458 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:08:43,458 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:08:43,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-12 03:08:43,659 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:08:43,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:08:43,660 INFO L82 PathProgramCache]: Analyzing trace with hash -558073124, now seen corresponding path program 40 times [2020-11-12 03:08:43,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:08:43,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083502891] [2020-11-12 03:08:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:08:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:08:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:08:44,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083502891] [2020-11-12 03:08:44,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128980920] [2020-11-12 03:08:44,047 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:08:44,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 03:08:44,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:08:44,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:08:44,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:08:44,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:08:44,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:08:44,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:08:44,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-12 03:08:44,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834159257] [2020-11-12 03:08:44,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 03:08:44,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:08:44,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 03:08:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2020-11-12 03:08:44,927 INFO L87 Difference]: Start difference. First operand 3981 states and 6412 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:50,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:08:50,646 INFO L93 Difference]: Finished difference Result 8898 states and 14761 transitions. [2020-11-12 03:08:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-12 03:08:50,648 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:08:50,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:08:50,659 INFO L225 Difference]: With dead ends: 8898 [2020-11-12 03:08:50,659 INFO L226 Difference]: Without dead ends: 8474 [2020-11-12 03:08:50,660 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1271, Invalid=4279, Unknown=0, NotChecked=0, Total=5550 [2020-11-12 03:08:50,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8474 states. [2020-11-12 03:08:50,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8474 to 3952. [2020-11-12 03:08:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3840 states have (on average 1.659375) internal successors, (6372), 3951 states have internal predecessors, (6372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 6372 transitions. [2020-11-12 03:08:50,736 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 6372 transitions. Word has length 63 [2020-11-12 03:08:50,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:08:50,736 INFO L481 AbstractCegarLoop]: Abstraction has 3952 states and 6372 transitions. [2020-11-12 03:08:50,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:50,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 6372 transitions. [2020-11-12 03:08:50,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:08:50,746 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:08:50,746 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:08:50,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-12 03:08:50,960 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:08:50,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:08:50,961 INFO L82 PathProgramCache]: Analyzing trace with hash -219098676, now seen corresponding path program 41 times [2020-11-12 03:08:50,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:08:50,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289649872] [2020-11-12 03:08:50,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:08:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:08:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:08:51,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289649872] [2020-11-12 03:08:51,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932978910] [2020-11-12 03:08:51,289 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:08:51,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 03:08:51,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:08:51,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:08:51,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:08:52,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:52,127 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:52,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:08:52,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:08:52,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:08:52,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471248297] [2020-11-12 03:08:52,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:08:52,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:08:52,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:08:52,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:08:52,228 INFO L87 Difference]: Start difference. First operand 3952 states and 6372 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:55,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:08:55,097 INFO L93 Difference]: Finished difference Result 6814 states and 11757 transitions. [2020-11-12 03:08:55,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-12 03:08:55,098 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:08:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:08:55,107 INFO L225 Difference]: With dead ends: 6814 [2020-11-12 03:08:55,108 INFO L226 Difference]: Without dead ends: 6662 [2020-11-12 03:08:55,108 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=561, Invalid=1989, Unknown=0, NotChecked=0, Total=2550 [2020-11-12 03:08:55,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2020-11-12 03:08:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 3982. [2020-11-12 03:08:55,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3982 states, 3870 states have (on average 1.665891472868217) internal successors, (6447), 3981 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3982 states to 3982 states and 6447 transitions. [2020-11-12 03:08:55,213 INFO L78 Accepts]: Start accepts. Automaton has 3982 states and 6447 transitions. Word has length 63 [2020-11-12 03:08:55,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:08:55,213 INFO L481 AbstractCegarLoop]: Abstraction has 3982 states and 6447 transitions. [2020-11-12 03:08:55,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:08:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 3982 states and 6447 transitions. [2020-11-12 03:08:55,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:08:55,217 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:08:55,217 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:08:55,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-12 03:08:55,418 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:08:55,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:08:55,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1177830746, now seen corresponding path program 42 times [2020-11-12 03:08:55,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:08:55,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834842596] [2020-11-12 03:08:55,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:08:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:08:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:08:55,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834842596] [2020-11-12 03:08:55,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059132867] [2020-11-12 03:08:55,816 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:08:55,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 03:08:55,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:08:55,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:08:55,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:08:56,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:08:56,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:08:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:08:56,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:08:56,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-11-12 03:08:56,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560710131] [2020-11-12 03:08:56,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 03:08:56,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:08:56,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 03:08:56,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-11-12 03:08:56,539 INFO L87 Difference]: Start difference. First operand 3982 states and 6447 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:09:02,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:09:02,663 INFO L93 Difference]: Finished difference Result 8346 states and 13840 transitions. [2020-11-12 03:09:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-12 03:09:02,665 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:09:02,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:09:02,675 INFO L225 Difference]: With dead ends: 8346 [2020-11-12 03:09:02,675 INFO L226 Difference]: Without dead ends: 7922 [2020-11-12 03:09:02,675 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1396, Invalid=4924, Unknown=0, NotChecked=0, Total=6320 [2020-11-12 03:09:02,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7922 states. [2020-11-12 03:09:02,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7922 to 4022. [2020-11-12 03:09:02,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4022 states, 3910 states have (on average 1.672378516624041) internal successors, (6539), 4021 states have internal predecessors, (6539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:09:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4022 states to 4022 states and 6539 transitions. [2020-11-12 03:09:02,749 INFO L78 Accepts]: Start accepts. Automaton has 4022 states and 6539 transitions. Word has length 63 [2020-11-12 03:09:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:09:02,749 INFO L481 AbstractCegarLoop]: Abstraction has 4022 states and 6539 transitions. [2020-11-12 03:09:02,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:09:02,749 INFO L276 IsEmpty]: Start isEmpty. Operand 4022 states and 6539 transitions. [2020-11-12 03:09:02,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:09:02,754 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:09:02,754 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:09:02,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-12 03:09:02,955 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:09:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:09:02,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1999034296, now seen corresponding path program 43 times [2020-11-12 03:09:02,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:09:02,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560667316] [2020-11-12 03:09:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:09:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:09:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:09:03,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560667316] [2020-11-12 03:09:03,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390883766] [2020-11-12 03:09:03,438 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:09:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:09:03,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:09:03,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:09:04,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:09:04,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:09:04,343 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:09:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:09:04,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:09:04,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:09:04,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640131995] [2020-11-12 03:09:04,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:09:04,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:09:04,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:09:04,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-11-12 03:09:04,447 INFO L87 Difference]: Start difference. First operand 4022 states and 6539 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:09:08,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 03:09:08,692 INFO L93 Difference]: Finished difference Result 7115 states and 12106 transitions. [2020-11-12 03:09:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-12 03:09:08,694 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2020-11-12 03:09:08,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 03:09:08,702 INFO L225 Difference]: With dead ends: 7115 [2020-11-12 03:09:08,702 INFO L226 Difference]: Without dead ends: 6963 [2020-11-12 03:09:08,703 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=813, Invalid=2847, Unknown=0, NotChecked=0, Total=3660 [2020-11-12 03:09:08,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6963 states. [2020-11-12 03:09:08,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6963 to 3927. [2020-11-12 03:09:08,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3927 states, 3815 states have (on average 1.6671035386631716) internal successors, (6360), 3926 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:09:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 6360 transitions. [2020-11-12 03:09:08,800 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 6360 transitions. Word has length 63 [2020-11-12 03:09:08,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 03:09:08,800 INFO L481 AbstractCegarLoop]: Abstraction has 3927 states and 6360 transitions. [2020-11-12 03:09:08,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:09:08,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 6360 transitions. [2020-11-12 03:09:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-12 03:09:08,804 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 03:09:08,804 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 03:09:09,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-12 03:09:09,005 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 03:09:09,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 03:09:09,006 INFO L82 PathProgramCache]: Analyzing trace with hash -258688434, now seen corresponding path program 44 times [2020-11-12 03:09:09,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 03:09:09,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889488594] [2020-11-12 03:09:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 03:09:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 03:09:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:09:09,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889488594] [2020-11-12 03:09:09,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465049041] [2020-11-12 03:09:09,353 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:09:09,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 03:09:09,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 03:09:09,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 03:09:09,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 03:09:10,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 03:09:12,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 03:09:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 03:09:12,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 03:09:12,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-12 03:09:12,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805251867] [2020-11-12 03:09:12,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 03:09:12,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 03:09:12,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 03:09:12,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=386, Unknown=1, NotChecked=0, Total=506 [2020-11-12 03:09:12,115 INFO L87 Difference]: Start difference. First operand 3927 states and 6360 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 03:09:17,130 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-11-12 03:09:26,143 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 34 [2020-11-12 03:09:30,367 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-11-12 03:09:40,813 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-11-12 03:10:01,263 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-12 03:10:10,074 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 22 [2020-11-12 03:10:36,855 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 33 [2020-11-12 03:10:49,214 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 34 [2020-11-12 03:11:09,764 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-11-12 03:11:20,376 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-11-12 03:12:07,467 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-11-12 03:12:20,376 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 21 [2020-11-12 03:13:11,450 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-11-12 03:13:42,405 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-11-12 03:14:05,207 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-11-12 03:14:50,030 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 52 DAG size of output: 31 Received shutdown request... [2020-11-12 03:16:05,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-12 03:16:05,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 03:16:05,396 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-12 03:16:05,402 WARN L250 ceAbstractionStarter]: Timeout [2020-11-12 03:16:05,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 03:16:05 BasicIcfg [2020-11-12 03:16:05,402 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-12 03:16:05,403 INFO L168 Benchmark]: Toolchain (without parser) took 852644.21 ms. Allocated memory was 302.0 MB in the beginning and 761.3 MB in the end (delta: 459.3 MB). Free memory was 277.4 MB in the beginning and 648.8 MB in the end (delta: -371.3 MB). Peak memory consumption was 90.3 MB. Max. memory is 16.0 GB. [2020-11-12 03:16:05,404 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 302.0 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-12 03:16:05,404 INFO L168 Benchmark]: CACSL2BoogieTranslator took 572.76 ms. Allocated memory is still 302.0 MB. Free memory was 276.7 MB in the beginning and 247.6 MB in the end (delta: 29.1 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2020-11-12 03:16:05,404 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.54 ms. Allocated memory is still 302.0 MB. Free memory was 247.6 MB in the beginning and 245.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-12 03:16:05,405 INFO L168 Benchmark]: Boogie Preprocessor took 55.70 ms. Allocated memory is still 302.0 MB. Free memory was 245.7 MB in the beginning and 244.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-12 03:16:05,405 INFO L168 Benchmark]: RCFGBuilder took 600.51 ms. Allocated memory is still 302.0 MB. Free memory was 244.5 MB in the beginning and 265.8 MB in the end (delta: -21.4 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.0 GB. [2020-11-12 03:16:05,405 INFO L168 Benchmark]: TraceAbstraction took 851353.24 ms. Allocated memory was 302.0 MB in the beginning and 761.3 MB in the end (delta: 459.3 MB). Free memory was 264.8 MB in the beginning and 648.8 MB in the end (delta: -384.0 MB). Peak memory consumption was 75.4 MB. Max. memory is 16.0 GB. [2020-11-12 03:16:05,407 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 302.0 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 572.76 ms. Allocated memory is still 302.0 MB. Free memory was 276.7 MB in the beginning and 247.6 MB in the end (delta: 29.1 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 49.54 ms. Allocated memory is still 302.0 MB. Free memory was 247.6 MB in the beginning and 245.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 55.70 ms. Allocated memory is still 302.0 MB. Free memory was 245.7 MB in the beginning and 244.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 600.51 ms. Allocated memory is still 302.0 MB. Free memory was 244.5 MB in the beginning and 265.8 MB in the end (delta: -21.4 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 851353.24 ms. Allocated memory was 302.0 MB in the beginning and 761.3 MB in the end (delta: 459.3 MB). Free memory was 264.8 MB in the beginning and 648.8 MB in the end (delta: -384.0 MB). Peak memory consumption was 75.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (3927states) and FLOYD_HOARE automaton (currently 64 states, 23 states before enhancement),while ReachableStatesComputation was computing reachable states (6072 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 851.1s, OverallIterations: 61, TraceHistogramMax: 6, AutomataDifference: 781.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.3s, HoareTripleCheckerStatistics: 5097 SDtfs, 45409 SDslu, 61610 SDs, 0 SdLazy, 11589 SolverSat, 4377 SolverUnsat, 256 SolverUnknown, 0 SolverNotchecked, 492.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5595 GetRequests, 2743 SyntacticMatches, 25 SemanticMatches, 2827 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47161 ImplicationChecksByTransitivity, 314.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4022occurred in iteration=59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.7s AutomataMinimizationTime, 60 MinimizatonAttempts, 138995 StatesRemovedByMinimization, 60 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 48.0s InterpolantComputationTime, 6496 NumberOfCodeBlocks, 6496 NumberOfCodeBlocksAsserted, 209 NumberOfCheckSat, 6379 ConstructedInterpolants, 11 QuantifiedInterpolants, 2895105 SizeOfPredicates, 231 NumberOfNonLiveVariables, 7695 ConjunctsInSsa, 725 ConjunctsInUnsatCore, 117 InterpolantComputations, 5 PerfectInterpolantSequences, 0/2520 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