/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-11 14:42:50,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-11 14:42:50,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-11 14:42:50,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-11 14:42:50,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-11 14:42:50,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-11 14:42:50,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-11 14:42:50,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-11 14:42:50,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-11 14:42:50,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-11 14:42:50,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-11 14:42:50,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-11 14:42:50,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-11 14:42:50,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-11 14:42:50,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-11 14:42:50,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-11 14:42:50,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-11 14:42:50,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-11 14:42:50,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-11 14:42:50,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-11 14:42:50,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-11 14:42:50,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-11 14:42:50,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-11 14:42:50,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-11 14:42:50,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-11 14:42:50,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-11 14:42:50,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-11 14:42:50,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-11 14:42:50,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-11 14:42:50,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-11 14:42:50,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-11 14:42:50,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-11 14:42:50,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-11 14:42:50,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-11 14:42:50,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-11 14:42:50,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-11 14:42:50,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-11 14:42:50,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-11 14:42:50,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-11 14:42:50,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-11 14:42:50,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-11 14:42:50,410 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2020-11-11 14:42:50,471 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-11 14:42:50,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-11 14:42:50,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-11 14:42:50,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-11 14:42:50,475 INFO L138 SettingsManager]: * Use SBE=true [2020-11-11 14:42:50,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-11 14:42:50,476 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-11 14:42:50,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-11 14:42:50,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-11 14:42:50,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-11 14:42:50,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-11 14:42:50,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-11 14:42:50,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-11 14:42:50,479 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-11 14:42:50,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-11 14:42:50,479 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-11 14:42:50,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-11 14:42:50,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-11 14:42:50,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-11 14:42:50,480 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-11 14:42:50,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-11 14:42:50,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 14:42:50,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-11 14:42:50,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-11 14:42:50,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-11 14:42:50,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-11 14:42:50,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-11 14:42:50,482 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-11 14:42:50,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-11 14:42:50,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-11 14:42:50,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-11 14:42:50,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-11 14:42:50,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-11 14:42:50,976 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-11 14:42:50,977 INFO L275 PluginConnector]: CDTParser initialized [2020-11-11 14:42:50,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-11-11 14:42:51,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d855b36a/ff02b2dc0b034769902e53224de23842/FLAG67734e3d3 [2020-11-11 14:42:51,821 INFO L306 CDTParser]: Found 1 translation units. [2020-11-11 14:42:51,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-11-11 14:42:51,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d855b36a/ff02b2dc0b034769902e53224de23842/FLAG67734e3d3 [2020-11-11 14:42:52,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d855b36a/ff02b2dc0b034769902e53224de23842 [2020-11-11 14:42:52,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-11 14:42:52,080 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-11 14:42:52,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-11 14:42:52,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-11 14:42:52,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-11 14:42:52,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46942a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52, skipping insertion in model container [2020-11-11 14:42:52,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-11 14:42:52,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-11 14:42:52,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 14:42:52,603 INFO L203 MainTranslator]: Completed pre-run [2020-11-11 14:42:52,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 14:42:52,732 INFO L208 MainTranslator]: Completed translation [2020-11-11 14:42:52,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52 WrapperNode [2020-11-11 14:42:52,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-11 14:42:52,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-11 14:42:52,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-11 14:42:52,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-11 14:42:52,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-11 14:42:52,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-11 14:42:52,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-11 14:42:52,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-11 14:42:52,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (1/1) ... [2020-11-11 14:42:52,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-11 14:42:52,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-11 14:42:52,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-11 14:42:52,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-11 14:42:52,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (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 [2020-11-11 14:42:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-11 14:42:52,920 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-11 14:42:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-11 14:42:52,920 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-11 14:42:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-11 14:42:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-11 14:42:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-11 14:42:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-11 14:42:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-11 14:42:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-11 14:42:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-11 14:42:52,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-11 14:42:52,923 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-11 14:42:53,344 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-11 14:42:53,344 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-11 14:42:53,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 02:42:53 BoogieIcfgContainer [2020-11-11 14:42:53,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-11 14:42:53,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-11 14:42:53,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-11 14:42:53,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-11 14:42:53,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 02:42:52" (1/3) ... [2020-11-11 14:42:53,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3769c362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 02:42:53, skipping insertion in model container [2020-11-11 14:42:53,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 02:42:52" (2/3) ... [2020-11-11 14:42:53,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3769c362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 02:42:53, skipping insertion in model container [2020-11-11 14:42:53,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 02:42:53" (3/3) ... [2020-11-11 14:42:53,356 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2020-11-11 14:42:53,376 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-11 14:42:53,376 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-11 14:42:53,381 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-11 14:42:53,382 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-11 14:42:53,435 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,435 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,436 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,436 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,437 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,437 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,437 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,437 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,438 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,439 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,440 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,440 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,440 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,441 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,441 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,441 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,442 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,442 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,442 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,442 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,443 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,443 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,443 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,444 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,444 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,444 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,444 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,446 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,446 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,446 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,447 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,447 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,447 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,448 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,448 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,448 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,448 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,449 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,450 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,450 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,450 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,452 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,452 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,453 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,453 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,453 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,453 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,454 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,454 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,454 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,455 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,455 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,455 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,455 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,456 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,456 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,456 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,456 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,458 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,459 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,461 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,462 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,462 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,462 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,462 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,462 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,468 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,468 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,469 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,469 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,469 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,469 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 14:42:53,480 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-11 14:42:53,493 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-11 14:42:53,530 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-11 14:42:53,530 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-11 14:42:53,530 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-11 14:42:53,531 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-11 14:42:53,531 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-11 14:42:53,531 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-11 14:42:53,531 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-11 14:42:53,532 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-11 14:42:53,548 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2020-11-11 14:42:53,731 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) [2020-11-11 14:42:53,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:53,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-11 14:42:53,766 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:53,767 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] [2020-11-11 14:42:53,767 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:53,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:53,775 INFO L82 PathProgramCache]: Analyzing trace with hash 792846013, now seen corresponding path program 1 times [2020-11-11 14:42:53,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:53,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297010668] [2020-11-11 14:42:53,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:54,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297010668] [2020-11-11 14:42:54,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 14:42:54,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 14:42:54,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853169507] [2020-11-11 14:42:54,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 14:42:54,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:54,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 14:42:54,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 14:42:54,390 INFO L87 Difference]: Start difference. First operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:54,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:54,629 INFO L93 Difference]: Finished difference Result 4034 states and 11738 transitions. [2020-11-11 14:42:54,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-11 14:42:54,632 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 [2020-11-11 14:42:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:54,663 INFO L225 Difference]: With dead ends: 4034 [2020-11-11 14:42:54,664 INFO L226 Difference]: Without dead ends: 1472 [2020-11-11 14:42:54,665 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 [2020-11-11 14:42:54,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2020-11-11 14:42:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1127. [2020-11-11 14:42:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.766429840142096) internal successors, (3115), 1126 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3115 transitions. [2020-11-11 14:42:54,845 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3115 transitions. Word has length 28 [2020-11-11 14:42:54,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:54,846 INFO L481 AbstractCegarLoop]: Abstraction has 1127 states and 3115 transitions. [2020-11-11 14:42:54,846 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) [2020-11-11 14:42:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3115 transitions. [2020-11-11 14:42:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-11 14:42:54,855 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:54,855 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] [2020-11-11 14:42:54,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-11 14:42:54,856 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:54,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1269163793, now seen corresponding path program 1 times [2020-11-11 14:42:54,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:54,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711549437] [2020-11-11 14:42:54,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:55,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711549437] [2020-11-11 14:42:55,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 14:42:55,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 14:42:55,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632030701] [2020-11-11 14:42:55,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 14:42:55,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:55,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 14:42:55,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-11 14:42:55,166 INFO L87 Difference]: Start difference. First operand 1127 states and 3115 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) [2020-11-11 14:42:55,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:55,336 INFO L93 Difference]: Finished difference Result 1984 states and 5365 transitions. [2020-11-11 14:42:55,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 14:42:55,337 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 [2020-11-11 14:42:55,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:55,355 INFO L225 Difference]: With dead ends: 1984 [2020-11-11 14:42:55,356 INFO L226 Difference]: Without dead ends: 1726 [2020-11-11 14:42:55,357 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-11 14:42:55,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2020-11-11 14:42:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1222. [2020-11-11 14:42:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 2.7706797706797706) internal successors, (3383), 1221 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 3383 transitions. [2020-11-11 14:42:55,440 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 3383 transitions. Word has length 33 [2020-11-11 14:42:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:55,441 INFO L481 AbstractCegarLoop]: Abstraction has 1222 states and 3383 transitions. [2020-11-11 14:42:55,441 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) [2020-11-11 14:42:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 3383 transitions. [2020-11-11 14:42:55,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-11 14:42:55,444 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:55,444 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] [2020-11-11 14:42:55,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-11 14:42:55,445 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:55,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:55,446 INFO L82 PathProgramCache]: Analyzing trace with hash -11030355, now seen corresponding path program 1 times [2020-11-11 14:42:55,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:55,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580085027] [2020-11-11 14:42:55,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:55,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580085027] [2020-11-11 14:42:55,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 14:42:55,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 14:42:55,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009596369] [2020-11-11 14:42:55,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 14:42:55,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:55,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 14:42:55,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-11 14:42:55,646 INFO L87 Difference]: Start difference. First operand 1222 states and 3383 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) [2020-11-11 14:42:55,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:55,777 INFO L93 Difference]: Finished difference Result 2030 states and 5424 transitions. [2020-11-11 14:42:55,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 14:42:55,778 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 [2020-11-11 14:42:55,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:55,791 INFO L225 Difference]: With dead ends: 2030 [2020-11-11 14:42:55,791 INFO L226 Difference]: Without dead ends: 1726 [2020-11-11 14:42:55,792 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-11-11 14:42:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2020-11-11 14:42:55,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1325. [2020-11-11 14:42:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 2.7235649546827796) internal successors, (3606), 1324 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 3606 transitions. [2020-11-11 14:42:55,855 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 3606 transitions. Word has length 33 [2020-11-11 14:42:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:55,855 INFO L481 AbstractCegarLoop]: Abstraction has 1325 states and 3606 transitions. [2020-11-11 14:42:55,855 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) [2020-11-11 14:42:55,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 3606 transitions. [2020-11-11 14:42:55,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-11 14:42:55,858 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:55,858 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] [2020-11-11 14:42:55,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-11 14:42:55,859 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:55,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:55,859 INFO L82 PathProgramCache]: Analyzing trace with hash 810583645, now seen corresponding path program 2 times [2020-11-11 14:42:55,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:55,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054431866] [2020-11-11 14:42:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:55,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054431866] [2020-11-11 14:42:55,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 14:42:55,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 14:42:55,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074658113] [2020-11-11 14:42:55,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 14:42:55,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:55,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 14:42:55,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-11 14:42:55,975 INFO L87 Difference]: Start difference. First operand 1325 states and 3606 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) [2020-11-11 14:42:56,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:56,119 INFO L93 Difference]: Finished difference Result 2222 states and 5936 transitions. [2020-11-11 14:42:56,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 14:42:56,120 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 [2020-11-11 14:42:56,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:56,133 INFO L225 Difference]: With dead ends: 2222 [2020-11-11 14:42:56,133 INFO L226 Difference]: Without dead ends: 1900 [2020-11-11 14:42:56,134 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-11-11 14:42:56,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-11-11 14:42:56,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1403. [2020-11-11 14:42:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1402 states have (on average 2.732524964336662) internal successors, (3831), 1402 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 3831 transitions. [2020-11-11 14:42:56,191 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 3831 transitions. Word has length 33 [2020-11-11 14:42:56,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:56,191 INFO L481 AbstractCegarLoop]: Abstraction has 1403 states and 3831 transitions. [2020-11-11 14:42:56,191 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) [2020-11-11 14:42:56,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 3831 transitions. [2020-11-11 14:42:56,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-11 14:42:56,195 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:56,195 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] [2020-11-11 14:42:56,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-11 14:42:56,195 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:56,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:56,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1172880459, now seen corresponding path program 1 times [2020-11-11 14:42:56,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:56,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600917184] [2020-11-11 14:42:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:56,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600917184] [2020-11-11 14:42:56,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 14:42:56,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-11 14:42:56,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713452999] [2020-11-11 14:42:56,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 14:42:56,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:56,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 14:42:56,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-11 14:42:56,332 INFO L87 Difference]: Start difference. First operand 1403 states and 3831 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) [2020-11-11 14:42:56,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:56,439 INFO L93 Difference]: Finished difference Result 2116 states and 5627 transitions. [2020-11-11 14:42:56,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-11 14:42:56,440 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 [2020-11-11 14:42:56,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:56,454 INFO L225 Difference]: With dead ends: 2116 [2020-11-11 14:42:56,454 INFO L226 Difference]: Without dead ends: 1964 [2020-11-11 14:42:56,455 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-11 14:42:56,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2020-11-11 14:42:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1428. [2020-11-11 14:42:56,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.7231955150665734) internal successors, (3886), 1427 states have internal predecessors, (3886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:56,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3886 transitions. [2020-11-11 14:42:56,515 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3886 transitions. Word has length 38 [2020-11-11 14:42:56,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:56,516 INFO L481 AbstractCegarLoop]: Abstraction has 1428 states and 3886 transitions. [2020-11-11 14:42:56,516 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) [2020-11-11 14:42:56,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3886 transitions. [2020-11-11 14:42:56,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-11 14:42:56,519 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:56,519 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] [2020-11-11 14:42:56,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-11 14:42:56,520 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:56,520 INFO L82 PathProgramCache]: Analyzing trace with hash 986200915, now seen corresponding path program 2 times [2020-11-11 14:42:56,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:56,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357267266] [2020-11-11 14:42:56,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:56,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357267266] [2020-11-11 14:42:56,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 14:42:56,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-11 14:42:56,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353183494] [2020-11-11 14:42:56,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 14:42:56,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:56,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 14:42:56,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-11 14:42:56,642 INFO L87 Difference]: Start difference. First operand 1428 states and 3886 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) [2020-11-11 14:42:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:56,950 INFO L93 Difference]: Finished difference Result 2692 states and 7163 transitions. [2020-11-11 14:42:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 14:42:56,951 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 [2020-11-11 14:42:56,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:56,966 INFO L225 Difference]: With dead ends: 2692 [2020-11-11 14:42:56,966 INFO L226 Difference]: Without dead ends: 2264 [2020-11-11 14:42:56,968 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 [2020-11-11 14:42:56,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2020-11-11 14:42:57,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1571. [2020-11-11 14:42:57,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.7229299363057327) internal successors, (4275), 1570 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:57,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 4275 transitions. [2020-11-11 14:42:57,033 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 4275 transitions. Word has length 38 [2020-11-11 14:42:57,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:57,034 INFO L481 AbstractCegarLoop]: Abstraction has 1571 states and 4275 transitions. [2020-11-11 14:42:57,034 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) [2020-11-11 14:42:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 4275 transitions. [2020-11-11 14:42:57,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-11 14:42:57,037 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:57,037 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] [2020-11-11 14:42:57,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-11 14:42:57,038 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:57,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:57,038 INFO L82 PathProgramCache]: Analyzing trace with hash 155330065, now seen corresponding path program 3 times [2020-11-11 14:42:57,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:57,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254435065] [2020-11-11 14:42:57,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:57,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254435065] [2020-11-11 14:42:57,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 14:42:57,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-11 14:42:57,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927286588] [2020-11-11 14:42:57,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 14:42:57,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:57,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 14:42:57,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-11 14:42:57,203 INFO L87 Difference]: Start difference. First operand 1571 states and 4275 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) [2020-11-11 14:42:57,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:57,394 INFO L93 Difference]: Finished difference Result 2840 states and 7553 transitions. [2020-11-11 14:42:57,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 14:42:57,395 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 [2020-11-11 14:42:57,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:57,412 INFO L225 Difference]: With dead ends: 2840 [2020-11-11 14:42:57,412 INFO L226 Difference]: Without dead ends: 2534 [2020-11-11 14:42:57,413 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-11-11 14:42:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2020-11-11 14:42:57,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1703. [2020-11-11 14:42:57,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 2.710340775558167) internal successors, (4613), 1702 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:57,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 4613 transitions. [2020-11-11 14:42:57,507 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 4613 transitions. Word has length 38 [2020-11-11 14:42:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:57,508 INFO L481 AbstractCegarLoop]: Abstraction has 1703 states and 4613 transitions. [2020-11-11 14:42:57,509 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) [2020-11-11 14:42:57,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 4613 transitions. [2020-11-11 14:42:57,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-11 14:42:57,515 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:57,516 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] [2020-11-11 14:42:57,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-11 14:42:57,516 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:57,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:57,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1891700926, now seen corresponding path program 1 times [2020-11-11 14:42:57,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:57,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602353882] [2020-11-11 14:42:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:57,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602353882] [2020-11-11 14:42:57,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940810329] [2020-11-11 14:42:57,729 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 [2020-11-11 14:42:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:57,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 14:42:57,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:42:58,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:42:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:58,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:42:58,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-11 14:42:58,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112371452] [2020-11-11 14:42:58,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 14:42:58,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:58,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 14:42:58,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-11-11 14:42:58,034 INFO L87 Difference]: Start difference. First operand 1703 states and 4613 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) [2020-11-11 14:42:58,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:58,269 INFO L93 Difference]: Finished difference Result 2760 states and 7217 transitions. [2020-11-11 14:42:58,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 14:42:58,269 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 [2020-11-11 14:42:58,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:58,286 INFO L225 Difference]: With dead ends: 2760 [2020-11-11 14:42:58,287 INFO L226 Difference]: Without dead ends: 2456 [2020-11-11 14:42:58,287 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:42:58,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2020-11-11 14:42:58,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 1752. [2020-11-11 14:42:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.690462592804112) internal successors, (4711), 1751 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:58,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4711 transitions. [2020-11-11 14:42:58,388 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4711 transitions. Word has length 43 [2020-11-11 14:42:58,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:58,388 INFO L481 AbstractCegarLoop]: Abstraction has 1752 states and 4711 transitions. [2020-11-11 14:42:58,388 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) [2020-11-11 14:42:58,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4711 transitions. [2020-11-11 14:42:58,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-11 14:42:58,394 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:58,394 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] [2020-11-11 14:42:58,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-11 14:42:58,609 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:58,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:58,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1515548458, now seen corresponding path program 2 times [2020-11-11 14:42:58,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:58,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990904417] [2020-11-11 14:42:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:58,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990904417] [2020-11-11 14:42:58,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298965164] [2020-11-11 14:42:58,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:42:58,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:42:58,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:42:58,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 14:42:58,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:42:59,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:42:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:59,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:42:59,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-11 14:42:59,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456020272] [2020-11-11 14:42:59,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 14:42:59,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:59,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 14:42:59,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-11-11 14:42:59,036 INFO L87 Difference]: Start difference. First operand 1752 states and 4711 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) [2020-11-11 14:42:59,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:42:59,316 INFO L93 Difference]: Finished difference Result 2688 states and 7009 transitions. [2020-11-11 14:42:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 14:42:59,317 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 [2020-11-11 14:42:59,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:42:59,338 INFO L225 Difference]: With dead ends: 2688 [2020-11-11 14:42:59,339 INFO L226 Difference]: Without dead ends: 2536 [2020-11-11 14:42:59,339 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:42:59,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2020-11-11 14:42:59,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 1782. [2020-11-11 14:42:59,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 2.678832116788321) internal successors, (4771), 1781 states have internal predecessors, (4771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:42:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 4771 transitions. [2020-11-11 14:42:59,418 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 4771 transitions. Word has length 43 [2020-11-11 14:42:59,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:42:59,419 INFO L481 AbstractCegarLoop]: Abstraction has 1782 states and 4771 transitions. [2020-11-11 14:42:59,419 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) [2020-11-11 14:42:59,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 4771 transitions. [2020-11-11 14:42:59,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-11 14:42:59,423 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:42:59,423 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] [2020-11-11 14:42:59,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:42:59,638 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:42:59,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:42:59,639 INFO L82 PathProgramCache]: Analyzing trace with hash -113571500, now seen corresponding path program 3 times [2020-11-11 14:42:59,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:42:59,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304732092] [2020-11-11 14:42:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:42:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:42:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:59,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304732092] [2020-11-11 14:42:59,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675881556] [2020-11-11 14:42:59,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:42:59,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 14:42:59,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:42:59,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 14:42:59,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:42:59,949 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:42:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:42:59,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:42:59,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-11 14:42:59,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756139468] [2020-11-11 14:42:59,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 14:42:59,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:42:59,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 14:42:59,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-11-11 14:42:59,959 INFO L87 Difference]: Start difference. First operand 1782 states and 4771 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) [2020-11-11 14:43:00,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:00,262 INFO L93 Difference]: Finished difference Result 2944 states and 7585 transitions. [2020-11-11 14:43:00,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 14:43:00,263 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 [2020-11-11 14:43:00,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:00,281 INFO L225 Difference]: With dead ends: 2944 [2020-11-11 14:43:00,281 INFO L226 Difference]: Without dead ends: 2640 [2020-11-11 14:43:00,282 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:43:00,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2020-11-11 14:43:00,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1802. [2020-11-11 14:43:00,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1801 states have (on average 2.684619655746807) internal successors, (4835), 1801 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:00,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 4835 transitions. [2020-11-11 14:43:00,353 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 4835 transitions. Word has length 43 [2020-11-11 14:43:00,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:00,354 INFO L481 AbstractCegarLoop]: Abstraction has 1802 states and 4835 transitions. [2020-11-11 14:43:00,354 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) [2020-11-11 14:43:00,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 4835 transitions. [2020-11-11 14:43:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-11 14:43:00,358 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:00,358 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] [2020-11-11 14:43:00,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-11 14:43:00,574 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:00,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:00,575 INFO L82 PathProgramCache]: Analyzing trace with hash -784309816, now seen corresponding path program 4 times [2020-11-11 14:43:00,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:00,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822259279] [2020-11-11 14:43:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:00,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822259279] [2020-11-11 14:43:00,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352356873] [2020-11-11 14:43:00,719 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 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 [2020-11-11 14:43:00,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:43:00,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:00,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:00,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:00,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:00,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:00,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:00,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-11-11 14:43:00,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75387668] [2020-11-11 14:43:00,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 14:43:00,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:00,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 14:43:00,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-11-11 14:43:00,978 INFO L87 Difference]: Start difference. First operand 1802 states and 4835 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:01,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:01,552 INFO L93 Difference]: Finished difference Result 4038 states and 10508 transitions. [2020-11-11 14:43:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 14:43:01,553 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2020-11-11 14:43:01,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:01,566 INFO L225 Difference]: With dead ends: 4038 [2020-11-11 14:43:01,566 INFO L226 Difference]: Without dead ends: 3328 [2020-11-11 14:43:01,567 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2020-11-11 14:43:01,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2020-11-11 14:43:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 1896. [2020-11-11 14:43:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 2.7150395778364116) internal successors, (5145), 1895 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:01,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 5145 transitions. [2020-11-11 14:43:01,675 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 5145 transitions. Word has length 43 [2020-11-11 14:43:01,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:01,676 INFO L481 AbstractCegarLoop]: Abstraction has 1896 states and 5145 transitions. [2020-11-11 14:43:01,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:01,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 5145 transitions. [2020-11-11 14:43:01,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-11 14:43:01,680 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:01,680 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] [2020-11-11 14:43:01,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:01,893 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:01,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:01,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1881175634, now seen corresponding path program 5 times [2020-11-11 14:43:01,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:01,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125438738] [2020-11-11 14:43:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:02,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125438738] [2020-11-11 14:43:02,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624368867] [2020-11-11 14:43:02,070 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 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 [2020-11-11 14:43:02,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:43:02,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:02,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 14:43:02,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:02,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:02,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:02,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-11 14:43:02,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064472030] [2020-11-11 14:43:02,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 14:43:02,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:02,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 14:43:02,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-11 14:43:02,307 INFO L87 Difference]: Start difference. First operand 1896 states and 5145 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) [2020-11-11 14:43:02,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:02,741 INFO L93 Difference]: Finished difference Result 3374 states and 8808 transitions. [2020-11-11 14:43:02,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 14:43:02,741 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 [2020-11-11 14:43:02,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:02,752 INFO L225 Difference]: With dead ends: 3374 [2020-11-11 14:43:02,752 INFO L226 Difference]: Without dead ends: 3222 [2020-11-11 14:43:02,753 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-11-11 14:43:02,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2020-11-11 14:43:02,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 2008. [2020-11-11 14:43:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 2.74090682610862) internal successors, (5501), 2007 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 5501 transitions. [2020-11-11 14:43:02,823 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 5501 transitions. Word has length 43 [2020-11-11 14:43:02,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:02,823 INFO L481 AbstractCegarLoop]: Abstraction has 2008 states and 5501 transitions. [2020-11-11 14:43:02,824 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) [2020-11-11 14:43:02,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 5501 transitions. [2020-11-11 14:43:02,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-11 14:43:02,828 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:02,828 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] [2020-11-11 14:43:03,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-11 14:43:03,043 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:03,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:03,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1455611250, now seen corresponding path program 6 times [2020-11-11 14:43:03,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:03,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365149289] [2020-11-11 14:43:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:03,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365149289] [2020-11-11 14:43:03,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896786044] [2020-11-11 14:43:03,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:03,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 14:43:03,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:03,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 14:43:03,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:03,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:43:03,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:03,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:03,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-11-11 14:43:03,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952894656] [2020-11-11 14:43:03,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 14:43:03,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:03,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 14:43:03,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-11 14:43:03,476 INFO L87 Difference]: Start difference. First operand 2008 states and 5501 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) [2020-11-11 14:43:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:04,214 INFO L93 Difference]: Finished difference Result 4284 states and 11395 transitions. [2020-11-11 14:43:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:43:04,215 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 [2020-11-11 14:43:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:04,225 INFO L225 Difference]: With dead ends: 4284 [2020-11-11 14:43:04,226 INFO L226 Difference]: Without dead ends: 3702 [2020-11-11 14:43:04,226 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=287, Invalid=973, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 14:43:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2020-11-11 14:43:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 2214. [2020-11-11 14:43:04,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2214 states, 2213 states have (on average 2.7311342069588793) internal successors, (6044), 2213 states have internal predecessors, (6044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2214 states to 2214 states and 6044 transitions. [2020-11-11 14:43:04,300 INFO L78 Accepts]: Start accepts. Automaton has 2214 states and 6044 transitions. Word has length 43 [2020-11-11 14:43:04,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:04,301 INFO L481 AbstractCegarLoop]: Abstraction has 2214 states and 6044 transitions. [2020-11-11 14:43:04,301 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) [2020-11-11 14:43:04,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2214 states and 6044 transitions. [2020-11-11 14:43:04,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:04,305 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:04,306 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] [2020-11-11 14:43:04,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:04,521 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:04,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:04,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1176461249, now seen corresponding path program 7 times [2020-11-11 14:43:04,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:04,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729908572] [2020-11-11 14:43:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:04,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729908572] [2020-11-11 14:43:04,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008551309] [2020-11-11 14:43:04,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:04,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:04,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:04,883 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:04,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:04,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-11 14:43:04,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295826398] [2020-11-11 14:43:04,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:04,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:04,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:04,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:04,892 INFO L87 Difference]: Start difference. First operand 2214 states and 6044 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) [2020-11-11 14:43:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:05,319 INFO L93 Difference]: Finished difference Result 3610 states and 9380 transitions. [2020-11-11 14:43:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 14:43:05,319 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 [2020-11-11 14:43:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:05,328 INFO L225 Difference]: With dead ends: 3610 [2020-11-11 14:43:05,328 INFO L226 Difference]: Without dead ends: 3306 [2020-11-11 14:43:05,329 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2020-11-11 14:43:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2020-11-11 14:43:05,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2313. [2020-11-11 14:43:05,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 2.704152249134948) internal successors, (6252), 2312 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:05,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 6252 transitions. [2020-11-11 14:43:05,401 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 6252 transitions. Word has length 48 [2020-11-11 14:43:05,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:05,401 INFO L481 AbstractCegarLoop]: Abstraction has 2313 states and 6252 transitions. [2020-11-11 14:43:05,401 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) [2020-11-11 14:43:05,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 6252 transitions. [2020-11-11 14:43:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:05,406 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:05,406 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] [2020-11-11 14:43:05,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-11 14:43:05,620 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:05,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:05,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1275776819, now seen corresponding path program 1 times [2020-11-11 14:43:05,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:05,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569945589] [2020-11-11 14:43:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:05,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569945589] [2020-11-11 14:43:05,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912030007] [2020-11-11 14:43:05,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-11 14:43:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:05,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:05,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:06,003 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:06,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:06,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-11 14:43:06,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679728891] [2020-11-11 14:43:06,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:06,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:06,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:06,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:06,035 INFO L87 Difference]: Start difference. First operand 2313 states and 6252 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) [2020-11-11 14:43:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:06,418 INFO L93 Difference]: Finished difference Result 3538 states and 9172 transitions. [2020-11-11 14:43:06,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 14:43:06,419 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 [2020-11-11 14:43:06,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:06,428 INFO L225 Difference]: With dead ends: 3538 [2020-11-11 14:43:06,428 INFO L226 Difference]: Without dead ends: 3386 [2020-11-11 14:43:06,438 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2020-11-11 14:43:06,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2020-11-11 14:43:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2372. [2020-11-11 14:43:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2371 states have (on average 2.689582454660481) internal successors, (6377), 2371 states have internal predecessors, (6377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 6377 transitions. [2020-11-11 14:43:06,512 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 6377 transitions. Word has length 48 [2020-11-11 14:43:06,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:06,513 INFO L481 AbstractCegarLoop]: Abstraction has 2372 states and 6377 transitions. [2020-11-11 14:43:06,513 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) [2020-11-11 14:43:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 6377 transitions. [2020-11-11 14:43:06,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:06,518 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:06,519 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] [2020-11-11 14:43:06,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-11 14:43:06,731 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:06,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:06,732 INFO L82 PathProgramCache]: Analyzing trace with hash 877660941, now seen corresponding path program 2 times [2020-11-11 14:43:06,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:06,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161276875] [2020-11-11 14:43:06,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:06,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161276875] [2020-11-11 14:43:06,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710412610] [2020-11-11 14:43:06,922 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 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 [2020-11-11 14:43:06,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:43:06,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:06,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:06,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:07,142 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:07,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:07,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-11 14:43:07,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139405503] [2020-11-11 14:43:07,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:07,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:07,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:07,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:07,151 INFO L87 Difference]: Start difference. First operand 2372 states and 6377 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) [2020-11-11 14:43:07,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:07,438 INFO L93 Difference]: Finished difference Result 3354 states and 8804 transitions. [2020-11-11 14:43:07,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 14:43:07,442 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 [2020-11-11 14:43:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:07,451 INFO L225 Difference]: With dead ends: 3354 [2020-11-11 14:43:07,451 INFO L226 Difference]: Without dead ends: 3202 [2020-11-11 14:43:07,452 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:43:07,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2020-11-11 14:43:07,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 2347. [2020-11-11 14:43:07,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 2.6947996589940324) internal successors, (6322), 2346 states have internal predecessors, (6322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:07,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 6322 transitions. [2020-11-11 14:43:07,517 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 6322 transitions. Word has length 48 [2020-11-11 14:43:07,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:07,518 INFO L481 AbstractCegarLoop]: Abstraction has 2347 states and 6322 transitions. [2020-11-11 14:43:07,518 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) [2020-11-11 14:43:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 6322 transitions. [2020-11-11 14:43:07,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:07,523 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:07,523 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] [2020-11-11 14:43:07,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-11 14:43:07,738 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:07,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:07,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1441005203, now seen corresponding path program 8 times [2020-11-11 14:43:07,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:07,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182110128] [2020-11-11 14:43:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:07,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182110128] [2020-11-11 14:43:07,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195761099] [2020-11-11 14:43:07,877 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 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 [2020-11-11 14:43:07,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:43:07,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:07,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:07,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:08,127 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:08,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:08,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-11 14:43:08,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298999101] [2020-11-11 14:43:08,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:08,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:08,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:08,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:08,142 INFO L87 Difference]: Start difference. First operand 2347 states and 6322 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) [2020-11-11 14:43:08,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:08,578 INFO L93 Difference]: Finished difference Result 3960 states and 10085 transitions. [2020-11-11 14:43:08,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 14:43:08,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2020-11-11 14:43:08,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:08,586 INFO L225 Difference]: With dead ends: 3960 [2020-11-11 14:43:08,586 INFO L226 Difference]: Without dead ends: 3656 [2020-11-11 14:43:08,589 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2020-11-11 14:43:08,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2020-11-11 14:43:08,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 2322. [2020-11-11 14:43:08,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2321 states have (on average 2.7001292546316242) internal successors, (6267), 2321 states have internal predecessors, (6267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:08,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 6267 transitions. [2020-11-11 14:43:08,652 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 6267 transitions. Word has length 48 [2020-11-11 14:43:08,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:08,652 INFO L481 AbstractCegarLoop]: Abstraction has 2322 states and 6267 transitions. [2020-11-11 14:43:08,653 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) [2020-11-11 14:43:08,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 6267 transitions. [2020-11-11 14:43:08,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:08,658 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:08,658 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] [2020-11-11 14:43:08,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-11 14:43:08,872 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:08,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:08,873 INFO L82 PathProgramCache]: Analyzing trace with hash -466213799, now seen corresponding path program 9 times [2020-11-11 14:43:08,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:08,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287651582] [2020-11-11 14:43:08,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:09,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287651582] [2020-11-11 14:43:09,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235889469] [2020-11-11 14:43:09,013 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 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 [2020-11-11 14:43:09,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 14:43:09,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:09,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:09,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:09,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:09,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:09,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-11 14:43:09,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536177453] [2020-11-11 14:43:09,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:09,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:09,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:09,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:09,241 INFO L87 Difference]: Start difference. First operand 2322 states and 6267 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) [2020-11-11 14:43:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:09,790 INFO L93 Difference]: Finished difference Result 4298 states and 11081 transitions. [2020-11-11 14:43:09,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 14:43:09,791 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 [2020-11-11 14:43:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:09,799 INFO L225 Difference]: With dead ends: 4298 [2020-11-11 14:43:09,799 INFO L226 Difference]: Without dead ends: 3994 [2020-11-11 14:43:09,804 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2020-11-11 14:43:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3994 states. [2020-11-11 14:43:09,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3994 to 2527. [2020-11-11 14:43:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2527 states, 2526 states have (on average 2.750989707046714) internal successors, (6949), 2526 states have internal predecessors, (6949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2527 states to 2527 states and 6949 transitions. [2020-11-11 14:43:09,917 INFO L78 Accepts]: Start accepts. Automaton has 2527 states and 6949 transitions. Word has length 48 [2020-11-11 14:43:09,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:09,917 INFO L481 AbstractCegarLoop]: Abstraction has 2527 states and 6949 transitions. [2020-11-11 14:43:09,917 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) [2020-11-11 14:43:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2527 states and 6949 transitions. [2020-11-11 14:43:09,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:09,927 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:09,928 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] [2020-11-11 14:43:10,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-11 14:43:10,128 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:10,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:10,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1424394211, now seen corresponding path program 10 times [2020-11-11 14:43:10,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:10,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142832764] [2020-11-11 14:43:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:10,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142832764] [2020-11-11 14:43:10,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556813161] [2020-11-11 14:43:10,295 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 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 [2020-11-11 14:43:10,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:43:10,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:10,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:10,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:10,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:43:10,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:10,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:10,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-11 14:43:10,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821775834] [2020-11-11 14:43:10,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:10,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:10,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:10,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:10,533 INFO L87 Difference]: Start difference. First operand 2527 states and 6949 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) [2020-11-11 14:43:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:11,505 INFO L93 Difference]: Finished difference Result 5000 states and 13209 transitions. [2020-11-11 14:43:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 14:43:11,506 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 [2020-11-11 14:43:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:11,512 INFO L225 Difference]: With dead ends: 5000 [2020-11-11 14:43:11,512 INFO L226 Difference]: Without dead ends: 4360 [2020-11-11 14:43:11,513 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 14:43:11,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4360 states. [2020-11-11 14:43:11,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4360 to 2545. [2020-11-11 14:43:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 2544 states have (on average 2.729952830188679) internal successors, (6945), 2544 states have internal predecessors, (6945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 6945 transitions. [2020-11-11 14:43:11,585 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 6945 transitions. Word has length 48 [2020-11-11 14:43:11,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:11,585 INFO L481 AbstractCegarLoop]: Abstraction has 2545 states and 6945 transitions. [2020-11-11 14:43:11,585 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) [2020-11-11 14:43:11,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 6945 transitions. [2020-11-11 14:43:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:11,592 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:11,592 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] [2020-11-11 14:43:11,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:11,806 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:11,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:11,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1153932635, now seen corresponding path program 3 times [2020-11-11 14:43:11,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:11,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572462619] [2020-11-11 14:43:11,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:11,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572462619] [2020-11-11 14:43:11,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569112326] [2020-11-11 14:43:11,947 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 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 [2020-11-11 14:43:12,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 14:43:12,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:12,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:12,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:12,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:12,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:12,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-11 14:43:12,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544474438] [2020-11-11 14:43:12,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:12,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:12,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:12,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:12,175 INFO L87 Difference]: Start difference. First operand 2545 states and 6945 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) [2020-11-11 14:43:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:12,728 INFO L93 Difference]: Finished difference Result 4354 states and 11226 transitions. [2020-11-11 14:43:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 14:43:12,729 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 [2020-11-11 14:43:12,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:12,735 INFO L225 Difference]: With dead ends: 4354 [2020-11-11 14:43:12,735 INFO L226 Difference]: Without dead ends: 4202 [2020-11-11 14:43:12,736 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2020-11-11 14:43:12,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4202 states. [2020-11-11 14:43:12,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4202 to 2727. [2020-11-11 14:43:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 2.7457813646368305) internal successors, (7485), 2726 states have internal predecessors, (7485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:12,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 7485 transitions. [2020-11-11 14:43:12,819 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 7485 transitions. Word has length 48 [2020-11-11 14:43:12,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:12,820 INFO L481 AbstractCegarLoop]: Abstraction has 2727 states and 7485 transitions. [2020-11-11 14:43:12,820 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) [2020-11-11 14:43:12,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 7485 transitions. [2020-11-11 14:43:12,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:12,829 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:12,829 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] [2020-11-11 14:43:13,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-11-11 14:43:13,044 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:13,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:13,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1756245019, now seen corresponding path program 4 times [2020-11-11 14:43:13,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:13,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157760449] [2020-11-11 14:43:13,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:13,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157760449] [2020-11-11 14:43:13,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356601439] [2020-11-11 14:43:13,168 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 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 [2020-11-11 14:43:13,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:43:13,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:13,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:13,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:13,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:13,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:13,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-11-11 14:43:13,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381732291] [2020-11-11 14:43:13,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:13,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:13,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:13,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:13,365 INFO L87 Difference]: Start difference. First operand 2727 states and 7485 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) [2020-11-11 14:43:13,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:13,960 INFO L93 Difference]: Finished difference Result 4419 states and 11726 transitions. [2020-11-11 14:43:13,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 14:43:13,960 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 [2020-11-11 14:43:13,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:13,966 INFO L225 Difference]: With dead ends: 4419 [2020-11-11 14:43:13,966 INFO L226 Difference]: Without dead ends: 4267 [2020-11-11 14:43:13,967 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2020-11-11 14:43:13,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4267 states. [2020-11-11 14:43:14,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 2807. [2020-11-11 14:43:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2806 states have (on average 2.777975766215253) internal successors, (7795), 2806 states have internal predecessors, (7795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:14,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 7795 transitions. [2020-11-11 14:43:14,038 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 7795 transitions. Word has length 48 [2020-11-11 14:43:14,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:14,038 INFO L481 AbstractCegarLoop]: Abstraction has 2807 states and 7795 transitions. [2020-11-11 14:43:14,038 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) [2020-11-11 14:43:14,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 7795 transitions. [2020-11-11 14:43:14,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-11 14:43:14,043 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:14,043 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] [2020-11-11 14:43:14,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:14,257 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:14,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:14,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1580541865, now seen corresponding path program 5 times [2020-11-11 14:43:14,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:14,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33164079] [2020-11-11 14:43:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:14,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33164079] [2020-11-11 14:43:14,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679110580] [2020-11-11 14:43:14,395 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 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 [2020-11-11 14:43:14,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 14:43:14,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:14,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 14:43:14,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:14,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:43:14,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:14,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:14,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-11-11 14:43:14,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478344434] [2020-11-11 14:43:14,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 14:43:14,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:14,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 14:43:14,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-11 14:43:14,656 INFO L87 Difference]: Start difference. First operand 2807 states and 7795 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) [2020-11-11 14:43:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:15,882 INFO L93 Difference]: Finished difference Result 5900 states and 15563 transitions. [2020-11-11 14:43:15,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 14:43:15,883 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 [2020-11-11 14:43:15,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:15,891 INFO L225 Difference]: With dead ends: 5900 [2020-11-11 14:43:15,891 INFO L226 Difference]: Without dead ends: 5312 [2020-11-11 14:43:15,894 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=561, Invalid=1989, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 14:43:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2020-11-11 14:43:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 2845. [2020-11-11 14:43:15,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.7475386779184245) internal successors, (7814), 2844 states have internal predecessors, (7814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 7814 transitions. [2020-11-11 14:43:15,977 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 7814 transitions. Word has length 48 [2020-11-11 14:43:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:15,978 INFO L481 AbstractCegarLoop]: Abstraction has 2845 states and 7814 transitions. [2020-11-11 14:43:15,978 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) [2020-11-11 14:43:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 7814 transitions. [2020-11-11 14:43:15,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:15,983 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:15,983 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] [2020-11-11 14:43:16,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-11 14:43:16,197 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:16,198 INFO L82 PathProgramCache]: Analyzing trace with hash 359511380, now seen corresponding path program 6 times [2020-11-11 14:43:16,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:16,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482665522] [2020-11-11 14:43:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:16,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482665522] [2020-11-11 14:43:16,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652656351] [2020-11-11 14:43:16,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 14:43:16,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 14:43:16,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:16,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:16,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:16,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:16,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:16,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:16,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626418887] [2020-11-11 14:43:16,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:16,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:16,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:16,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:16,640 INFO L87 Difference]: Start difference. First operand 2845 states and 7814 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) [2020-11-11 14:43:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:16,997 INFO L93 Difference]: Finished difference Result 4274 states and 11166 transitions. [2020-11-11 14:43:16,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 14:43:16,998 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 [2020-11-11 14:43:16,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:17,003 INFO L225 Difference]: With dead ends: 4274 [2020-11-11 14:43:17,003 INFO L226 Difference]: Without dead ends: 4122 [2020-11-11 14:43:17,004 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-11-11 14:43:17,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2020-11-11 14:43:17,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 2895. [2020-11-11 14:43:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2895 states, 2894 states have (on average 2.7380787836903937) internal successors, (7924), 2894 states have internal predecessors, (7924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2895 states to 2895 states and 7924 transitions. [2020-11-11 14:43:17,071 INFO L78 Accepts]: Start accepts. Automaton has 2895 states and 7924 transitions. Word has length 53 [2020-11-11 14:43:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:17,072 INFO L481 AbstractCegarLoop]: Abstraction has 2895 states and 7924 transitions. [2020-11-11 14:43:17,072 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) [2020-11-11 14:43:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2895 states and 7924 transitions. [2020-11-11 14:43:17,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:17,077 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:17,077 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] [2020-11-11 14:43:17,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:17,292 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:17,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:17,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1250756246, now seen corresponding path program 7 times [2020-11-11 14:43:17,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:17,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164101854] [2020-11-11 14:43:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:17,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164101854] [2020-11-11 14:43:17,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178861334] [2020-11-11 14:43:17,461 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 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 [2020-11-11 14:43:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:17,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:17,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:17,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:17,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:17,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:17,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702861132] [2020-11-11 14:43:17,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:17,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:17,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:17,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:17,712 INFO L87 Difference]: Start difference. First operand 2895 states and 7924 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) [2020-11-11 14:43:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:18,120 INFO L93 Difference]: Finished difference Result 4448 states and 11504 transitions. [2020-11-11 14:43:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 14:43:18,121 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 [2020-11-11 14:43:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:18,127 INFO L225 Difference]: With dead ends: 4448 [2020-11-11 14:43:18,128 INFO L226 Difference]: Without dead ends: 4296 [2020-11-11 14:43:18,128 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2020-11-11 14:43:18,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2020-11-11 14:43:18,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 2985. [2020-11-11 14:43:18,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2985 states, 2984 states have (on average 2.7208445040214477) internal successors, (8119), 2984 states have internal predecessors, (8119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 8119 transitions. [2020-11-11 14:43:18,204 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 8119 transitions. Word has length 53 [2020-11-11 14:43:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:18,204 INFO L481 AbstractCegarLoop]: Abstraction has 2985 states and 8119 transitions. [2020-11-11 14:43:18,205 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) [2020-11-11 14:43:18,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 8119 transitions. [2020-11-11 14:43:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:18,210 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:18,211 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] [2020-11-11 14:43:18,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-11 14:43:18,425 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:18,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:18,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1648872124, now seen corresponding path program 8 times [2020-11-11 14:43:18,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:18,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971476228] [2020-11-11 14:43:18,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:18,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971476228] [2020-11-11 14:43:18,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281977753] [2020-11-11 14:43:18,601 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 [2020-11-11 14:43:18,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:43:18,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:18,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:18,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:18,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:18,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:18,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:18,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052627759] [2020-11-11 14:43:18,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:18,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:18,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:18,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:18,946 INFO L87 Difference]: Start difference. First operand 2985 states and 8119 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) [2020-11-11 14:43:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:19,400 INFO L93 Difference]: Finished difference Result 4323 states and 11261 transitions. [2020-11-11 14:43:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 14:43:19,401 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 [2020-11-11 14:43:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:19,408 INFO L225 Difference]: With dead ends: 4323 [2020-11-11 14:43:19,408 INFO L226 Difference]: Without dead ends: 4171 [2020-11-11 14:43:19,409 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-11-11 14:43:19,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2020-11-11 14:43:19,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 2960. [2020-11-11 14:43:19,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2960 states, 2959 states have (on average 2.7252450152078405) internal successors, (8064), 2959 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:19,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2960 states to 2960 states and 8064 transitions. [2020-11-11 14:43:19,483 INFO L78 Accepts]: Start accepts. Automaton has 2960 states and 8064 transitions. Word has length 53 [2020-11-11 14:43:19,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:19,484 INFO L481 AbstractCegarLoop]: Abstraction has 2960 states and 8064 transitions. [2020-11-11 14:43:19,484 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) [2020-11-11 14:43:19,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2960 states and 8064 transitions. [2020-11-11 14:43:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:19,489 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:19,490 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] [2020-11-11 14:43:19,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-11 14:43:19,702 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:19,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:19,703 INFO L82 PathProgramCache]: Analyzing trace with hash 215220982, now seen corresponding path program 9 times [2020-11-11 14:43:19,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:19,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396888630] [2020-11-11 14:43:19,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:19,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396888630] [2020-11-11 14:43:19,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644003336] [2020-11-11 14:43:19,862 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 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 [2020-11-11 14:43:19,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 14:43:19,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:19,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:19,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:20,127 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:20,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:20,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:20,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244532293] [2020-11-11 14:43:20,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:20,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:20,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:20,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:20,138 INFO L87 Difference]: Start difference. First operand 2960 states and 8064 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) [2020-11-11 14:43:20,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:20,576 INFO L93 Difference]: Finished difference Result 4425 states and 11463 transitions. [2020-11-11 14:43:20,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 14:43:20,577 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 [2020-11-11 14:43:20,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:20,586 INFO L225 Difference]: With dead ends: 4425 [2020-11-11 14:43:20,586 INFO L226 Difference]: Without dead ends: 4273 [2020-11-11 14:43:20,587 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2020-11-11 14:43:20,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4273 states. [2020-11-11 14:43:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4273 to 3060. [2020-11-11 14:43:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3060 states, 3059 states have (on average 2.7080745341614905) internal successors, (8284), 3059 states have internal predecessors, (8284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3060 states to 3060 states and 8284 transitions. [2020-11-11 14:43:20,659 INFO L78 Accepts]: Start accepts. Automaton has 3060 states and 8284 transitions. Word has length 53 [2020-11-11 14:43:20,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:20,660 INFO L481 AbstractCegarLoop]: Abstraction has 3060 states and 8284 transitions. [2020-11-11 14:43:20,660 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) [2020-11-11 14:43:20,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3060 states and 8284 transitions. [2020-11-11 14:43:20,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:20,665 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:20,666 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] [2020-11-11 14:43:20,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-11 14:43:20,880 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:20,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:20,880 INFO L82 PathProgramCache]: Analyzing trace with hash -55700888, now seen corresponding path program 10 times [2020-11-11 14:43:20,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:20,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905563630] [2020-11-11 14:43:20,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:21,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905563630] [2020-11-11 14:43:21,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951925682] [2020-11-11 14:43:21,073 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 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 [2020-11-11 14:43:21,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:43:21,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:21,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:21,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:21,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:21,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:21,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:21,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633770640] [2020-11-11 14:43:21,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:21,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:21,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:21,368 INFO L87 Difference]: Start difference. First operand 3060 states and 8284 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) [2020-11-11 14:43:21,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:21,956 INFO L93 Difference]: Finished difference Result 4538 states and 11686 transitions. [2020-11-11 14:43:21,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 14:43:21,957 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 [2020-11-11 14:43:21,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:21,962 INFO L225 Difference]: With dead ends: 4538 [2020-11-11 14:43:21,962 INFO L226 Difference]: Without dead ends: 4386 [2020-11-11 14:43:21,963 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2020-11-11 14:43:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2020-11-11 14:43:22,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3059. [2020-11-11 14:43:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 2.7066710268149117) internal successors, (8277), 3058 states have internal predecessors, (8277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 8277 transitions. [2020-11-11 14:43:22,039 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 8277 transitions. Word has length 53 [2020-11-11 14:43:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:22,040 INFO L481 AbstractCegarLoop]: Abstraction has 3059 states and 8277 transitions. [2020-11-11 14:43:22,040 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) [2020-11-11 14:43:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 8277 transitions. [2020-11-11 14:43:22,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:22,045 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:22,046 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] [2020-11-11 14:43:22,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-11 14:43:22,260 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:22,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:22,260 INFO L82 PathProgramCache]: Analyzing trace with hash 78654292, now seen corresponding path program 11 times [2020-11-11 14:43:22,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:22,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973508075] [2020-11-11 14:43:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:22,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973508075] [2020-11-11 14:43:22,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615315367] [2020-11-11 14:43:22,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:22,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 14:43:22,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:22,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:22,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:22,680 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:22,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:22,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:22,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987017161] [2020-11-11 14:43:22,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:22,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:22,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:22,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:22,696 INFO L87 Difference]: Start difference. First operand 3059 states and 8277 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) [2020-11-11 14:43:23,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:23,158 INFO L93 Difference]: Finished difference Result 4384 states and 11376 transitions. [2020-11-11 14:43:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 14:43:23,158 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 [2020-11-11 14:43:23,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:23,164 INFO L225 Difference]: With dead ends: 4384 [2020-11-11 14:43:23,164 INFO L226 Difference]: Without dead ends: 4232 [2020-11-11 14:43:23,165 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2020-11-11 14:43:23,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4232 states. [2020-11-11 14:43:23,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4232 to 3009. [2020-11-11 14:43:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.715093085106383) internal successors, (8167), 3008 states have internal predecessors, (8167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 8167 transitions. [2020-11-11 14:43:23,239 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 8167 transitions. Word has length 53 [2020-11-11 14:43:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:23,239 INFO L481 AbstractCegarLoop]: Abstraction has 3009 states and 8167 transitions. [2020-11-11 14:43:23,239 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) [2020-11-11 14:43:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 8167 transitions. [2020-11-11 14:43:23,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:23,282 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:23,282 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] [2020-11-11 14:43:23,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-11 14:43:23,491 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:23,492 INFO L82 PathProgramCache]: Analyzing trace with hash -425336602, now seen corresponding path program 12 times [2020-11-11 14:43:23,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:23,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830881813] [2020-11-11 14:43:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:23,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830881813] [2020-11-11 14:43:23,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426236542] [2020-11-11 14:43:23,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:23,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 14:43:23,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:23,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:23,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:23,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:23,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:23,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:23,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084212119] [2020-11-11 14:43:23,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:23,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:23,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:23,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:23,923 INFO L87 Difference]: Start difference. First operand 3009 states and 8167 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) [2020-11-11 14:43:24,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:24,324 INFO L93 Difference]: Finished difference Result 4523 states and 11669 transitions. [2020-11-11 14:43:24,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 14:43:24,325 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 [2020-11-11 14:43:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:24,330 INFO L225 Difference]: With dead ends: 4523 [2020-11-11 14:43:24,330 INFO L226 Difference]: Without dead ends: 4371 [2020-11-11 14:43:24,330 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2020-11-11 14:43:24,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2020-11-11 14:43:24,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3034. [2020-11-11 14:43:24,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3033 states have (on average 2.7108473458621827) internal successors, (8222), 3033 states have internal predecessors, (8222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 8222 transitions. [2020-11-11 14:43:24,386 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 8222 transitions. Word has length 53 [2020-11-11 14:43:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:24,386 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 8222 transitions. [2020-11-11 14:43:24,387 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) [2020-11-11 14:43:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 8222 transitions. [2020-11-11 14:43:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:24,392 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:24,392 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] [2020-11-11 14:43:24,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:24,606 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:24,606 INFO L82 PathProgramCache]: Analyzing trace with hash -2035604228, now seen corresponding path program 13 times [2020-11-11 14:43:24,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:24,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732305377] [2020-11-11 14:43:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:24,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732305377] [2020-11-11 14:43:24,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009040315] [2020-11-11 14:43:24,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:24,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:24,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:24,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:25,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:25,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:25,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172220190] [2020-11-11 14:43:25,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:25,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:25,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:25,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:25,005 INFO L87 Difference]: Start difference. First operand 3034 states and 8222 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) [2020-11-11 14:43:25,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:25,583 INFO L93 Difference]: Finished difference Result 4753 states and 12119 transitions. [2020-11-11 14:43:25,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 14:43:25,584 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 [2020-11-11 14:43:25,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:25,589 INFO L225 Difference]: With dead ends: 4753 [2020-11-11 14:43:25,589 INFO L226 Difference]: Without dead ends: 4601 [2020-11-11 14:43:25,590 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2020-11-11 14:43:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2020-11-11 14:43:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3059. [2020-11-11 14:43:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 2.7066710268149117) internal successors, (8277), 3058 states have internal predecessors, (8277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:25,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 8277 transitions. [2020-11-11 14:43:25,664 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 8277 transitions. Word has length 53 [2020-11-11 14:43:25,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:25,665 INFO L481 AbstractCegarLoop]: Abstraction has 3059 states and 8277 transitions. [2020-11-11 14:43:25,665 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) [2020-11-11 14:43:25,665 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 8277 transitions. [2020-11-11 14:43:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:25,671 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:25,671 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] [2020-11-11 14:43:25,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:25,887 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:25,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:25,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1861247190, now seen corresponding path program 14 times [2020-11-11 14:43:25,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:25,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297030714] [2020-11-11 14:43:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:26,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297030714] [2020-11-11 14:43:26,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568516027] [2020-11-11 14:43:26,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:26,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:43:26,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:26,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:26,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:26,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:26,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:26,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:26,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971057500] [2020-11-11 14:43:26,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:26,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:26,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:26,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:26,327 INFO L87 Difference]: Start difference. First operand 3059 states and 8277 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) [2020-11-11 14:43:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:26,825 INFO L93 Difference]: Finished difference Result 4528 states and 11664 transitions. [2020-11-11 14:43:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 14:43:26,826 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 [2020-11-11 14:43:26,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:26,832 INFO L225 Difference]: With dead ends: 4528 [2020-11-11 14:43:26,832 INFO L226 Difference]: Without dead ends: 4376 [2020-11-11 14:43:26,833 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2020-11-11 14:43:26,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2020-11-11 14:43:26,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 2984. [2020-11-11 14:43:26,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2984 states, 2983 states have (on average 2.7194099899430104) internal successors, (8112), 2983 states have internal predecessors, (8112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 8112 transitions. [2020-11-11 14:43:26,887 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 8112 transitions. Word has length 53 [2020-11-11 14:43:26,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:26,887 INFO L481 AbstractCegarLoop]: Abstraction has 2984 states and 8112 transitions. [2020-11-11 14:43:26,887 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) [2020-11-11 14:43:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 8112 transitions. [2020-11-11 14:43:26,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:26,891 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:26,891 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] [2020-11-11 14:43:27,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:27,098 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:27,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:27,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2076656768, now seen corresponding path program 15 times [2020-11-11 14:43:27,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:27,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029404777] [2020-11-11 14:43:27,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:27,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029404777] [2020-11-11 14:43:27,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539075512] [2020-11-11 14:43:27,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:27,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 14:43:27,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:27,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:27,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:27,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:27,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:27,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:27,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774216866] [2020-11-11 14:43:27,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:27,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:27,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:27,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:27,506 INFO L87 Difference]: Start difference. First operand 2984 states and 8112 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) [2020-11-11 14:43:27,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:27,951 INFO L93 Difference]: Finished difference Result 4578 states and 11789 transitions. [2020-11-11 14:43:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 14:43:27,952 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 [2020-11-11 14:43:27,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:27,957 INFO L225 Difference]: With dead ends: 4578 [2020-11-11 14:43:27,958 INFO L226 Difference]: Without dead ends: 4426 [2020-11-11 14:43:27,958 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2020-11-11 14:43:27,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2020-11-11 14:43:28,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 2984. [2020-11-11 14:43:28,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2984 states, 2983 states have (on average 2.7194099899430104) internal successors, (8112), 2983 states have internal predecessors, (8112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 8112 transitions. [2020-11-11 14:43:28,027 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 8112 transitions. Word has length 53 [2020-11-11 14:43:28,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:28,028 INFO L481 AbstractCegarLoop]: Abstraction has 2984 states and 8112 transitions. [2020-11-11 14:43:28,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 8112 transitions. [2020-11-11 14:43:28,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:28,033 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:28,033 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] [2020-11-11 14:43:28,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-11 14:43:28,249 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:28,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:28,249 INFO L82 PathProgramCache]: Analyzing trace with hash 675391302, now seen corresponding path program 16 times [2020-11-11 14:43:28,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:28,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819663133] [2020-11-11 14:43:28,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:28,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819663133] [2020-11-11 14:43:28,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911116770] [2020-11-11 14:43:28,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:28,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:43:28,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:28,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:43:28,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:28,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:28,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:28,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:28,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666234354] [2020-11-11 14:43:28,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:28,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:28,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:28,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:28,679 INFO L87 Difference]: Start difference. First operand 2984 states and 8112 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) [2020-11-11 14:43:29,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:29,171 INFO L93 Difference]: Finished difference Result 4632 states and 12007 transitions. [2020-11-11 14:43:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 14:43:29,171 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 [2020-11-11 14:43:29,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:29,177 INFO L225 Difference]: With dead ends: 4632 [2020-11-11 14:43:29,177 INFO L226 Difference]: Without dead ends: 4480 [2020-11-11 14:43:29,178 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2020-11-11 14:43:29,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4480 states. [2020-11-11 14:43:29,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4480 to 3034. [2020-11-11 14:43:29,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3033 states have (on average 2.7306297395318166) internal successors, (8282), 3033 states have internal predecessors, (8282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:29,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 8282 transitions. [2020-11-11 14:43:29,225 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 8282 transitions. Word has length 53 [2020-11-11 14:43:29,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:29,225 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 8282 transitions. [2020-11-11 14:43:29,225 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) [2020-11-11 14:43:29,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 8282 transitions. [2020-11-11 14:43:29,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:29,230 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:29,230 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] [2020-11-11 14:43:29,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:29,432 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:29,432 INFO L82 PathProgramCache]: Analyzing trace with hash -585613004, now seen corresponding path program 17 times [2020-11-11 14:43:29,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:29,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524409698] [2020-11-11 14:43:29,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:29,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524409698] [2020-11-11 14:43:29,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046358932] [2020-11-11 14:43:29,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 14:43:29,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 14:43:29,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:29,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:29,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:29,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:43:30,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:30,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:30,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:30,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337027315] [2020-11-11 14:43:30,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:30,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:30,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:30,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:30,037 INFO L87 Difference]: Start difference. First operand 3034 states and 8282 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) [2020-11-11 14:43:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:30,921 INFO L93 Difference]: Finished difference Result 5973 states and 15720 transitions. [2020-11-11 14:43:30,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:43:30,922 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 [2020-11-11 14:43:30,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:30,929 INFO L225 Difference]: With dead ends: 5973 [2020-11-11 14:43:30,929 INFO L226 Difference]: Without dead ends: 5609 [2020-11-11 14:43:30,929 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 14:43:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5609 states. [2020-11-11 14:43:31,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5609 to 3034. [2020-11-11 14:43:31,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3033 states have (on average 2.7306297395318166) internal successors, (8282), 3033 states have internal predecessors, (8282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 8282 transitions. [2020-11-11 14:43:31,015 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 8282 transitions. Word has length 53 [2020-11-11 14:43:31,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:31,015 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 8282 transitions. [2020-11-11 14:43:31,015 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) [2020-11-11 14:43:31,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 8282 transitions. [2020-11-11 14:43:31,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:31,019 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:31,019 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] [2020-11-11 14:43:31,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-11 14:43:31,220 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:31,221 INFO L82 PathProgramCache]: Analyzing trace with hash 609088912, now seen corresponding path program 18 times [2020-11-11 14:43:31,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:31,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979964681] [2020-11-11 14:43:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:31,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979964681] [2020-11-11 14:43:31,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480386637] [2020-11-11 14:43:31,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 14:43:31,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 14:43:31,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:31,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:31,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:31,612 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:31,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:31,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:31,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716143905] [2020-11-11 14:43:31,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:31,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:31,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:31,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:31,626 INFO L87 Difference]: Start difference. First operand 3034 states and 8282 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) [2020-11-11 14:43:32,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:32,410 INFO L93 Difference]: Finished difference Result 5299 states and 13553 transitions. [2020-11-11 14:43:32,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:43:32,411 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 [2020-11-11 14:43:32,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:32,417 INFO L225 Difference]: With dead ends: 5299 [2020-11-11 14:43:32,418 INFO L226 Difference]: Without dead ends: 5147 [2020-11-11 14:43:32,418 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 14:43:32,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2020-11-11 14:43:32,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 3179. [2020-11-11 14:43:32,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3178 states have (on average 2.7539332913782255) internal successors, (8752), 3178 states have internal predecessors, (8752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 8752 transitions. [2020-11-11 14:43:32,477 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 8752 transitions. Word has length 53 [2020-11-11 14:43:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:32,477 INFO L481 AbstractCegarLoop]: Abstraction has 3179 states and 8752 transitions. [2020-11-11 14:43:32,477 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) [2020-11-11 14:43:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 8752 transitions. [2020-11-11 14:43:32,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:32,483 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:32,483 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] [2020-11-11 14:43:32,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:32,698 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:32,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:32,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1993878554, now seen corresponding path program 19 times [2020-11-11 14:43:32,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:32,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504418250] [2020-11-11 14:43:32,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:32,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504418250] [2020-11-11 14:43:32,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787790694] [2020-11-11 14:43:32,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:32,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:32,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:33,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:33,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:33,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:33,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741288223] [2020-11-11 14:43:33,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:33,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:33,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:33,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:33,087 INFO L87 Difference]: Start difference. First operand 3179 states and 8752 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) [2020-11-11 14:43:33,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:33,940 INFO L93 Difference]: Finished difference Result 5411 states and 14232 transitions. [2020-11-11 14:43:33,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:43:33,941 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 [2020-11-11 14:43:33,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:33,948 INFO L225 Difference]: With dead ends: 5411 [2020-11-11 14:43:33,948 INFO L226 Difference]: Without dead ends: 5259 [2020-11-11 14:43:33,948 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 14:43:33,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2020-11-11 14:43:33,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 3209. [2020-11-11 14:43:33,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 3208 states have (on average 2.7718204488778055) internal successors, (8892), 3208 states have internal predecessors, (8892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 8892 transitions. [2020-11-11 14:43:34,003 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 8892 transitions. Word has length 53 [2020-11-11 14:43:34,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:34,003 INFO L481 AbstractCegarLoop]: Abstraction has 3209 states and 8892 transitions. [2020-11-11 14:43:34,003 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) [2020-11-11 14:43:34,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 8892 transitions. [2020-11-11 14:43:34,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:34,007 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:34,008 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] [2020-11-11 14:43:34,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-11 14:43:34,210 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:34,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:34,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1035698142, now seen corresponding path program 20 times [2020-11-11 14:43:34,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:34,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647940610] [2020-11-11 14:43:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:34,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647940610] [2020-11-11 14:43:34,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906627117] [2020-11-11 14:43:34,353 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 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 [2020-11-11 14:43:34,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:43:34,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:34,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:34,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:34,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:43:34,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:34,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:34,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:34,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993789779] [2020-11-11 14:43:34,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:34,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:34,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:34,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:34,593 INFO L87 Difference]: Start difference. First operand 3209 states and 8892 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) [2020-11-11 14:43:35,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:35,856 INFO L93 Difference]: Finished difference Result 6362 states and 16880 transitions. [2020-11-11 14:43:35,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 14:43:35,861 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 [2020-11-11 14:43:35,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:35,869 INFO L225 Difference]: With dead ends: 6362 [2020-11-11 14:43:35,869 INFO L226 Difference]: Without dead ends: 5998 [2020-11-11 14:43:35,870 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 14:43:35,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5998 states. [2020-11-11 14:43:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5998 to 2999. [2020-11-11 14:43:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 2.7478318879252837) internal successors, (8238), 2998 states have internal predecessors, (8238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 8238 transitions. [2020-11-11 14:43:35,930 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 8238 transitions. Word has length 53 [2020-11-11 14:43:35,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:35,930 INFO L481 AbstractCegarLoop]: Abstraction has 2999 states and 8238 transitions. [2020-11-11 14:43:35,931 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) [2020-11-11 14:43:35,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 8238 transitions. [2020-11-11 14:43:35,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:35,934 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:35,935 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] [2020-11-11 14:43:36,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:36,135 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:36,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:36,136 INFO L82 PathProgramCache]: Analyzing trace with hash -198586930, now seen corresponding path program 21 times [2020-11-11 14:43:36,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:36,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958513309] [2020-11-11 14:43:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:36,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958513309] [2020-11-11 14:43:36,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304498302] [2020-11-11 14:43:36,317 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 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 [2020-11-11 14:43:36,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 14:43:36,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:36,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:36,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:36,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:36,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:36,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:36,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921535025] [2020-11-11 14:43:36,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:36,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:36,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:36,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:36,593 INFO L87 Difference]: Start difference. First operand 2999 states and 8238 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) [2020-11-11 14:43:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:37,385 INFO L93 Difference]: Finished difference Result 5165 states and 13151 transitions. [2020-11-11 14:43:37,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 14:43:37,385 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 [2020-11-11 14:43:37,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:37,391 INFO L225 Difference]: With dead ends: 5165 [2020-11-11 14:43:37,392 INFO L226 Difference]: Without dead ends: 5013 [2020-11-11 14:43:37,392 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 14:43:37,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5013 states. [2020-11-11 14:43:37,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5013 to 3069. [2020-11-11 14:43:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 3068 states have (on average 2.7451108213820077) internal successors, (8422), 3068 states have internal predecessors, (8422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:37,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 8422 transitions. [2020-11-11 14:43:37,447 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 8422 transitions. Word has length 53 [2020-11-11 14:43:37,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:37,447 INFO L481 AbstractCegarLoop]: Abstraction has 3069 states and 8422 transitions. [2020-11-11 14:43:37,447 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) [2020-11-11 14:43:37,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 8422 transitions. [2020-11-11 14:43:37,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:37,450 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:37,450 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] [2020-11-11 14:43:37,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-11 14:43:37,651 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:37,652 INFO L82 PathProgramCache]: Analyzing trace with hash -469508800, now seen corresponding path program 22 times [2020-11-11 14:43:37,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:37,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711435819] [2020-11-11 14:43:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:37,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711435819] [2020-11-11 14:43:37,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192263581] [2020-11-11 14:43:37,805 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 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 [2020-11-11 14:43:37,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:43:37,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:37,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:43:37,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:38,062 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:38,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:38,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:38,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709384563] [2020-11-11 14:43:38,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:38,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:38,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:38,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:38,075 INFO L87 Difference]: Start difference. First operand 3069 states and 8422 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) [2020-11-11 14:43:39,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:39,057 INFO L93 Difference]: Finished difference Result 5470 states and 13758 transitions. [2020-11-11 14:43:39,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 14:43:39,058 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 [2020-11-11 14:43:39,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:39,064 INFO L225 Difference]: With dead ends: 5470 [2020-11-11 14:43:39,064 INFO L226 Difference]: Without dead ends: 5318 [2020-11-11 14:43:39,064 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 14:43:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5318 states. [2020-11-11 14:43:39,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5318 to 3101. [2020-11-11 14:43:39,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 2.745806451612903) internal successors, (8512), 3100 states have internal predecessors, (8512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 8512 transitions. [2020-11-11 14:43:39,116 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 8512 transitions. Word has length 53 [2020-11-11 14:43:39,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:39,116 INFO L481 AbstractCegarLoop]: Abstraction has 3101 states and 8512 transitions. [2020-11-11 14:43:39,116 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) [2020-11-11 14:43:39,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 8512 transitions. [2020-11-11 14:43:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:39,120 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:39,120 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] [2020-11-11 14:43:39,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-11 14:43:39,321 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:39,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1190257276, now seen corresponding path program 23 times [2020-11-11 14:43:39,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:39,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201437513] [2020-11-11 14:43:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:39,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201437513] [2020-11-11 14:43:39,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582758251] [2020-11-11 14:43:39,464 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 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 [2020-11-11 14:43:39,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:43:39,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:39,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:39,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:39,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:39,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:39,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:39,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164106385] [2020-11-11 14:43:39,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:39,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:39,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:39,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:39,739 INFO L87 Difference]: Start difference. First operand 3101 states and 8512 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) [2020-11-11 14:43:40,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:40,671 INFO L93 Difference]: Finished difference Result 5233 states and 13464 transitions. [2020-11-11 14:43:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 14:43:40,672 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 [2020-11-11 14:43:40,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:40,678 INFO L225 Difference]: With dead ends: 5233 [2020-11-11 14:43:40,678 INFO L226 Difference]: Without dead ends: 5081 [2020-11-11 14:43:40,679 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 14:43:40,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2020-11-11 14:43:40,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 3096. [2020-11-11 14:43:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 3095 states have (on average 2.7563812600969304) internal successors, (8531), 3095 states have internal predecessors, (8531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 8531 transitions. [2020-11-11 14:43:40,729 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 8531 transitions. Word has length 53 [2020-11-11 14:43:40,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:40,729 INFO L481 AbstractCegarLoop]: Abstraction has 3096 states and 8531 transitions. [2020-11-11 14:43:40,729 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) [2020-11-11 14:43:40,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 8531 transitions. [2020-11-11 14:43:40,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:40,732 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:40,732 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] [2020-11-11 14:43:40,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-11 14:43:40,933 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:40,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:40,934 INFO L82 PathProgramCache]: Analyzing trace with hash 194532366, now seen corresponding path program 24 times [2020-11-11 14:43:40,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:40,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165206865] [2020-11-11 14:43:40,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:41,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165206865] [2020-11-11 14:43:41,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096450330] [2020-11-11 14:43:41,071 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 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 [2020-11-11 14:43:41,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:43:41,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:41,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 14:43:41,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:41,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:41,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:41,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-11-11 14:43:41,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477016501] [2020-11-11 14:43:41,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 14:43:41,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:41,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 14:43:41,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-11-11 14:43:41,272 INFO L87 Difference]: Start difference. First operand 3096 states and 8531 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:42,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:42,103 INFO L93 Difference]: Finished difference Result 5292 states and 13809 transitions. [2020-11-11 14:43:42,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 14:43:42,105 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2020-11-11 14:43:42,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:42,111 INFO L225 Difference]: With dead ends: 5292 [2020-11-11 14:43:42,111 INFO L226 Difference]: Without dead ends: 5140 [2020-11-11 14:43:42,112 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 14:43:42,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5140 states. [2020-11-11 14:43:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5140 to 3176. [2020-11-11 14:43:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3176 states, 3175 states have (on average 2.7656692913385825) internal successors, (8781), 3175 states have internal predecessors, (8781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:42,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3176 states to 3176 states and 8781 transitions. [2020-11-11 14:43:42,175 INFO L78 Accepts]: Start accepts. Automaton has 3176 states and 8781 transitions. Word has length 53 [2020-11-11 14:43:42,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:42,175 INFO L481 AbstractCegarLoop]: Abstraction has 3176 states and 8781 transitions. [2020-11-11 14:43:42,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:42,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3176 states and 8781 transitions. [2020-11-11 14:43:42,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:42,179 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:42,180 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] [2020-11-11 14:43:42,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-11 14:43:42,393 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:42,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:42,393 INFO L82 PathProgramCache]: Analyzing trace with hash -763648046, now seen corresponding path program 25 times [2020-11-11 14:43:42,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:42,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880138038] [2020-11-11 14:43:42,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:42,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880138038] [2020-11-11 14:43:42,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813568582] [2020-11-11 14:43:42,541 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 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 [2020-11-11 14:43:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:42,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:42,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:42,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:43:42,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:42,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:42,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:42,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051294070] [2020-11-11 14:43:42,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:42,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:42,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:42,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:42,853 INFO L87 Difference]: Start difference. First operand 3176 states and 8781 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) [2020-11-11 14:43:44,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:44,310 INFO L93 Difference]: Finished difference Result 6560 states and 17545 transitions. [2020-11-11 14:43:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 14:43:44,311 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 [2020-11-11 14:43:44,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:44,324 INFO L225 Difference]: With dead ends: 6560 [2020-11-11 14:43:44,325 INFO L226 Difference]: Without dead ends: 6148 [2020-11-11 14:43:44,326 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 14:43:44,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6148 states. [2020-11-11 14:43:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6148 to 3139. [2020-11-11 14:43:44,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3139 states, 3138 states have (on average 2.738687061822817) internal successors, (8594), 3138 states have internal predecessors, (8594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:44,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 8594 transitions. [2020-11-11 14:43:44,465 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 8594 transitions. Word has length 53 [2020-11-11 14:43:44,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:44,465 INFO L481 AbstractCegarLoop]: Abstraction has 3139 states and 8594 transitions. [2020-11-11 14:43:44,465 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) [2020-11-11 14:43:44,465 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 8594 transitions. [2020-11-11 14:43:44,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:44,469 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:44,470 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] [2020-11-11 14:43:44,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:44,682 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:44,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:44,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1355550908, now seen corresponding path program 26 times [2020-11-11 14:43:44,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:44,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772718396] [2020-11-11 14:43:44,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:44,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772718396] [2020-11-11 14:43:44,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690075411] [2020-11-11 14:43:44,837 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 [2020-11-11 14:43:44,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:43:44,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:44,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:44,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:45,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:45,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:45,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:45,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675837457] [2020-11-11 14:43:45,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:45,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:45,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:45,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:45,122 INFO L87 Difference]: Start difference. First operand 3139 states and 8594 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) [2020-11-11 14:43:46,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:46,322 INFO L93 Difference]: Finished difference Result 5679 states and 14471 transitions. [2020-11-11 14:43:46,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 14:43:46,322 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 [2020-11-11 14:43:46,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:46,329 INFO L225 Difference]: With dead ends: 5679 [2020-11-11 14:43:46,329 INFO L226 Difference]: Without dead ends: 5527 [2020-11-11 14:43:46,330 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=492, Invalid=1578, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 14:43:46,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5527 states. [2020-11-11 14:43:46,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5527 to 3269. [2020-11-11 14:43:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3269 states, 3268 states have (on average 2.758261933904529) internal successors, (9014), 3268 states have internal predecessors, (9014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:46,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3269 states to 3269 states and 9014 transitions. [2020-11-11 14:43:46,390 INFO L78 Accepts]: Start accepts. Automaton has 3269 states and 9014 transitions. Word has length 53 [2020-11-11 14:43:46,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:46,391 INFO L481 AbstractCegarLoop]: Abstraction has 3269 states and 9014 transitions. [2020-11-11 14:43:46,391 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) [2020-11-11 14:43:46,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3269 states and 9014 transitions. [2020-11-11 14:43:46,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:46,395 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:46,395 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] [2020-11-11 14:43:46,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-11-11 14:43:46,611 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:46,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:46,611 INFO L82 PathProgramCache]: Analyzing trace with hash 385888988, now seen corresponding path program 27 times [2020-11-11 14:43:46,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:46,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170098237] [2020-11-11 14:43:46,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:46,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170098237] [2020-11-11 14:43:46,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447035867] [2020-11-11 14:43:46,757 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 [2020-11-11 14:43:46,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 14:43:46,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:46,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:46,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:47,024 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:47,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:47,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:47,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887393148] [2020-11-11 14:43:47,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:47,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:47,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:47,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:47,062 INFO L87 Difference]: Start difference. First operand 3269 states and 9014 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) [2020-11-11 14:43:48,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:48,360 INFO L93 Difference]: Finished difference Result 5841 states and 15419 transitions. [2020-11-11 14:43:48,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 14:43:48,361 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 [2020-11-11 14:43:48,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:48,368 INFO L225 Difference]: With dead ends: 5841 [2020-11-11 14:43:48,368 INFO L226 Difference]: Without dead ends: 5689 [2020-11-11 14:43:48,369 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 14:43:48,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5689 states. [2020-11-11 14:43:48,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5689 to 3349. [2020-11-11 14:43:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3349 states, 3348 states have (on average 2.7670250896057347) internal successors, (9264), 3348 states have internal predecessors, (9264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3349 states to 3349 states and 9264 transitions. [2020-11-11 14:43:48,439 INFO L78 Accepts]: Start accepts. Automaton has 3349 states and 9264 transitions. Word has length 53 [2020-11-11 14:43:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:48,440 INFO L481 AbstractCegarLoop]: Abstraction has 3349 states and 9264 transitions. [2020-11-11 14:43:48,440 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) [2020-11-11 14:43:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3349 states and 9264 transitions. [2020-11-11 14:43:48,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:48,443 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:48,444 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] [2020-11-11 14:43:48,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-11 14:43:48,644 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:48,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:48,645 INFO L82 PathProgramCache]: Analyzing trace with hash -572291424, now seen corresponding path program 28 times [2020-11-11 14:43:48,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:48,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236588426] [2020-11-11 14:43:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:48,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236588426] [2020-11-11 14:43:48,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107402473] [2020-11-11 14:43:48,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 14:43:48,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:43:48,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:48,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:43:48,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:49,053 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:43:49,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:49,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:49,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:49,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068688673] [2020-11-11 14:43:49,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:49,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:49,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:49,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:49,138 INFO L87 Difference]: Start difference. First operand 3349 states and 9264 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) [2020-11-11 14:43:51,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:51,059 INFO L93 Difference]: Finished difference Result 7265 states and 19416 transitions. [2020-11-11 14:43:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 14:43:51,060 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 [2020-11-11 14:43:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:51,068 INFO L225 Difference]: With dead ends: 7265 [2020-11-11 14:43:51,069 INFO L226 Difference]: Without dead ends: 6731 [2020-11-11 14:43:51,070 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=756, Invalid=2550, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 14:43:51,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6731 states. [2020-11-11 14:43:51,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6731 to 3257. [2020-11-11 14:43:51,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 3256 states have (on average 2.7435503685503684) internal successors, (8933), 3256 states have internal predecessors, (8933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:51,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 8933 transitions. [2020-11-11 14:43:51,128 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 8933 transitions. Word has length 53 [2020-11-11 14:43:51,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:51,128 INFO L481 AbstractCegarLoop]: Abstraction has 3257 states and 8933 transitions. [2020-11-11 14:43:51,129 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) [2020-11-11 14:43:51,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 8933 transitions. [2020-11-11 14:43:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:51,131 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:51,131 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] [2020-11-11 14:43:51,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:51,332 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:51,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:51,333 INFO L82 PathProgramCache]: Analyzing trace with hash -115102330, now seen corresponding path program 29 times [2020-11-11 14:43:51,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:51,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058228874] [2020-11-11 14:43:51,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:51,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058228874] [2020-11-11 14:43:51,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597353755] [2020-11-11 14:43:51,505 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 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 [2020-11-11 14:43:51,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 14:43:51,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:51,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:51,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:51,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:51,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:51,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222612283] [2020-11-11 14:43:51,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:51,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:51,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:51,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:51,766 INFO L87 Difference]: Start difference. First operand 3257 states and 8933 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) [2020-11-11 14:43:52,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:52,321 INFO L93 Difference]: Finished difference Result 4979 states and 12865 transitions. [2020-11-11 14:43:52,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 14:43:52,322 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 [2020-11-11 14:43:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:52,328 INFO L225 Difference]: With dead ends: 4979 [2020-11-11 14:43:52,328 INFO L226 Difference]: Without dead ends: 4827 [2020-11-11 14:43:52,329 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2020-11-11 14:43:52,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4827 states. [2020-11-11 14:43:52,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4827 to 3232. [2020-11-11 14:43:52,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3232 states, 3231 states have (on average 2.7477561126586196) internal successors, (8878), 3231 states have internal predecessors, (8878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:52,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3232 states to 3232 states and 8878 transitions. [2020-11-11 14:43:52,379 INFO L78 Accepts]: Start accepts. Automaton has 3232 states and 8878 transitions. Word has length 53 [2020-11-11 14:43:52,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:52,379 INFO L481 AbstractCegarLoop]: Abstraction has 3232 states and 8878 transitions. [2020-11-11 14:43:52,379 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) [2020-11-11 14:43:52,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3232 states and 8878 transitions. [2020-11-11 14:43:52,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:52,382 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:52,382 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] [2020-11-11 14:43:52,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-11 14:43:52,583 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:52,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:52,583 INFO L82 PathProgramCache]: Analyzing trace with hash 274569686, now seen corresponding path program 30 times [2020-11-11 14:43:52,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:52,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020242088] [2020-11-11 14:43:52,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:52,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020242088] [2020-11-11 14:43:52,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228912542] [2020-11-11 14:43:52,747 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 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 [2020-11-11 14:43:52,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 14:43:52,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:52,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:52,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:53,033 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:53,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:53,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:53,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504261392] [2020-11-11 14:43:53,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:53,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:53,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:53,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:53,042 INFO L87 Difference]: Start difference. First operand 3232 states and 8878 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) [2020-11-11 14:43:53,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:53,712 INFO L93 Difference]: Finished difference Result 5176 states and 13343 transitions. [2020-11-11 14:43:53,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 14:43:53,713 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 [2020-11-11 14:43:53,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:53,719 INFO L225 Difference]: With dead ends: 5176 [2020-11-11 14:43:53,719 INFO L226 Difference]: Without dead ends: 5024 [2020-11-11 14:43:53,720 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=874, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 14:43:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5024 states. [2020-11-11 14:43:53,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5024 to 3236. [2020-11-11 14:43:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 3235 states have (on average 2.7542503863987635) internal successors, (8910), 3235 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 8910 transitions. [2020-11-11 14:43:53,801 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 8910 transitions. Word has length 53 [2020-11-11 14:43:53,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:53,801 INFO L481 AbstractCegarLoop]: Abstraction has 3236 states and 8910 transitions. [2020-11-11 14:43:53,801 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) [2020-11-11 14:43:53,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 8910 transitions. [2020-11-11 14:43:53,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:53,804 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:53,804 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] [2020-11-11 14:43:54,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:54,005 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:54,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:54,006 INFO L82 PathProgramCache]: Analyzing trace with hash 255932272, now seen corresponding path program 31 times [2020-11-11 14:43:54,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:54,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276195459] [2020-11-11 14:43:54,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:54,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276195459] [2020-11-11 14:43:54,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232130443] [2020-11-11 14:43:54,163 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 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 [2020-11-11 14:43:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:54,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:54,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:54,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:54,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:54,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:54,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911455047] [2020-11-11 14:43:54,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:54,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:54,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:54,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:54,412 INFO L87 Difference]: Start difference. First operand 3236 states and 8910 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) [2020-11-11 14:43:55,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:55,307 INFO L93 Difference]: Finished difference Result 5376 states and 14158 transitions. [2020-11-11 14:43:55,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 14:43:55,308 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 [2020-11-11 14:43:55,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:55,314 INFO L225 Difference]: With dead ends: 5376 [2020-11-11 14:43:55,314 INFO L226 Difference]: Without dead ends: 5224 [2020-11-11 14:43:55,315 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=359, Invalid=1201, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 14:43:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5224 states. [2020-11-11 14:43:55,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5224 to 3316. [2020-11-11 14:43:55,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3316 states, 3315 states have (on average 2.7631975867269984) internal successors, (9160), 3315 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3316 states to 3316 states and 9160 transitions. [2020-11-11 14:43:55,370 INFO L78 Accepts]: Start accepts. Automaton has 3316 states and 9160 transitions. Word has length 53 [2020-11-11 14:43:55,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:55,370 INFO L481 AbstractCegarLoop]: Abstraction has 3316 states and 9160 transitions. [2020-11-11 14:43:55,370 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) [2020-11-11 14:43:55,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3316 states and 9160 transitions. [2020-11-11 14:43:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-11 14:43:55,373 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:55,373 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] [2020-11-11 14:43:55,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-11 14:43:55,574 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:55,574 INFO L82 PathProgramCache]: Analyzing trace with hash -702248140, now seen corresponding path program 32 times [2020-11-11 14:43:55,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:55,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662715687] [2020-11-11 14:43:55,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:55,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662715687] [2020-11-11 14:43:55,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317937724] [2020-11-11 14:43:55,768 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 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 [2020-11-11 14:43:55,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:43:55,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:55,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 14:43:55,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:56,002 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:43:56,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:56,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:56,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-11-11 14:43:56,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534809220] [2020-11-11 14:43:56,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 14:43:56,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:56,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 14:43:56,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-11 14:43:56,058 INFO L87 Difference]: Start difference. First operand 3316 states and 9160 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) [2020-11-11 14:43:57,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:57,438 INFO L93 Difference]: Finished difference Result 6474 states and 17353 transitions. [2020-11-11 14:43:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 14:43:57,439 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 [2020-11-11 14:43:57,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:57,445 INFO L225 Difference]: With dead ends: 6474 [2020-11-11 14:43:57,446 INFO L226 Difference]: Without dead ends: 6110 [2020-11-11 14:43:57,447 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=551, Invalid=1899, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 14:43:57,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6110 states. [2020-11-11 14:43:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6110 to 3194. [2020-11-11 14:43:57,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3194 states, 3193 states have (on average 2.7554024428437205) internal successors, (8798), 3193 states have internal predecessors, (8798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:57,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 8798 transitions. [2020-11-11 14:43:57,503 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 8798 transitions. Word has length 53 [2020-11-11 14:43:57,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:57,503 INFO L481 AbstractCegarLoop]: Abstraction has 3194 states and 8798 transitions. [2020-11-11 14:43:57,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 8798 transitions. [2020-11-11 14:43:57,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:43:57,506 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:57,507 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] [2020-11-11 14:43:57,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-11 14:43:57,707 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:57,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:57,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1682270879, now seen corresponding path program 11 times [2020-11-11 14:43:57,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:57,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83236828] [2020-11-11 14:43:57,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:57,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83236828] [2020-11-11 14:43:57,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973146364] [2020-11-11 14:43:57,927 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 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 [2020-11-11 14:43:57,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 14:43:57,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:57,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:43:57,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:58,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:58,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:58,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:43:58,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733787054] [2020-11-11 14:43:58,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:43:58,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:58,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:43:58,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:43:58,299 INFO L87 Difference]: Start difference. First operand 3194 states and 8798 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) [2020-11-11 14:43:58,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:43:58,962 INFO L93 Difference]: Finished difference Result 5284 states and 13602 transitions. [2020-11-11 14:43:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 14:43:58,963 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 [2020-11-11 14:43:58,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:43:58,970 INFO L225 Difference]: With dead ends: 5284 [2020-11-11 14:43:58,970 INFO L226 Difference]: Without dead ends: 4892 [2020-11-11 14:43:58,970 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 14:43:58,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4892 states. [2020-11-11 14:43:59,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4892 to 3334. [2020-11-11 14:43:59,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 3333 states have (on average 2.7296729672967297) internal successors, (9098), 3333 states have internal predecessors, (9098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:43:59,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 9098 transitions. [2020-11-11 14:43:59,022 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 9098 transitions. Word has length 58 [2020-11-11 14:43:59,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:43:59,022 INFO L481 AbstractCegarLoop]: Abstraction has 3334 states and 9098 transitions. [2020-11-11 14:43:59,022 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) [2020-11-11 14:43:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 9098 transitions. [2020-11-11 14:43:59,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:43:59,025 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:43:59,025 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] [2020-11-11 14:43:59,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-11 14:43:59,226 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:43:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:43:59,227 INFO L82 PathProgramCache]: Analyzing trace with hash -160458349, now seen corresponding path program 33 times [2020-11-11 14:43:59,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:43:59,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946038764] [2020-11-11 14:43:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:43:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:43:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:59,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946038764] [2020-11-11 14:43:59,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640541520] [2020-11-11 14:43:59,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:43:59,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 14:43:59,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:43:59,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:43:59,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:43:59,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:59,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:59,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:43:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:43:59,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:43:59,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:43:59,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60517473] [2020-11-11 14:43:59,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:43:59,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:43:59,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:43:59,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:43:59,873 INFO L87 Difference]: Start difference. First operand 3334 states and 9098 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) [2020-11-11 14:44:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:00,528 INFO L93 Difference]: Finished difference Result 5164 states and 13234 transitions. [2020-11-11 14:44:00,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 14:44:00,529 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 [2020-11-11 14:44:00,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:00,561 INFO L225 Difference]: With dead ends: 5164 [2020-11-11 14:44:00,561 INFO L226 Difference]: Without dead ends: 5012 [2020-11-11 14:44:00,561 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 14:44:00,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2020-11-11 14:44:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 3309. [2020-11-11 14:44:00,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3308 states have (on average 2.733675937122128) internal successors, (9043), 3308 states have internal predecessors, (9043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:00,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 9043 transitions. [2020-11-11 14:44:00,615 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 9043 transitions. Word has length 58 [2020-11-11 14:44:00,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:00,615 INFO L481 AbstractCegarLoop]: Abstraction has 3309 states and 9043 transitions. [2020-11-11 14:44:00,615 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) [2020-11-11 14:44:00,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 9043 transitions. [2020-11-11 14:44:00,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:00,618 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:00,619 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] [2020-11-11 14:44:00,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-11-11 14:44:00,819 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:00,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:00,820 INFO L82 PathProgramCache]: Analyzing trace with hash -558574227, now seen corresponding path program 34 times [2020-11-11 14:44:00,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:00,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597377606] [2020-11-11 14:44:00,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:01,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597377606] [2020-11-11 14:44:01,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417517045] [2020-11-11 14:44:01,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:01,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:44:01,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:01,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:01,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:01,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:01,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:01,379 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:01,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:01,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:01,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:01,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:01,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:01,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:01,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:01,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279766037] [2020-11-11 14:44:01,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:01,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:01,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:01,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:01,467 INFO L87 Difference]: Start difference. First operand 3309 states and 9043 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) [2020-11-11 14:44:02,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:02,107 INFO L93 Difference]: Finished difference Result 5149 states and 13209 transitions. [2020-11-11 14:44:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 14:44:02,108 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 [2020-11-11 14:44:02,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:02,114 INFO L225 Difference]: With dead ends: 5149 [2020-11-11 14:44:02,114 INFO L226 Difference]: Without dead ends: 4997 [2020-11-11 14:44:02,115 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=294, Invalid=762, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 14:44:02,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4997 states. [2020-11-11 14:44:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4997 to 3324. [2020-11-11 14:44:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 3323 states have (on average 2.7303641287992777) internal successors, (9073), 3323 states have internal predecessors, (9073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 9073 transitions. [2020-11-11 14:44:02,171 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 9073 transitions. Word has length 58 [2020-11-11 14:44:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:02,171 INFO L481 AbstractCegarLoop]: Abstraction has 3324 states and 9073 transitions. [2020-11-11 14:44:02,171 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) [2020-11-11 14:44:02,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 9073 transitions. [2020-11-11 14:44:02,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:02,174 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:02,174 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] [2020-11-11 14:44:02,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:02,375 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:02,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1305518879, now seen corresponding path program 35 times [2020-11-11 14:44:02,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:02,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497314983] [2020-11-11 14:44:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:02,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497314983] [2020-11-11 14:44:02,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558647037] [2020-11-11 14:44:02,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:02,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 14:44:02,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:02,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:02,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:02,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:02,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:02,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:02,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755221877] [2020-11-11 14:44:02,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:02,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:02,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:02,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:02,885 INFO L87 Difference]: Start difference. First operand 3324 states and 9073 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) [2020-11-11 14:44:03,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:03,552 INFO L93 Difference]: Finished difference Result 5188 states and 13282 transitions. [2020-11-11 14:44:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 14:44:03,553 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 [2020-11-11 14:44:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:03,560 INFO L225 Difference]: With dead ends: 5188 [2020-11-11 14:44:03,561 INFO L226 Difference]: Without dead ends: 5036 [2020-11-11 14:44:03,561 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 14:44:03,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5036 states. [2020-11-11 14:44:03,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5036 to 3384. [2020-11-11 14:44:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3384 states, 3383 states have (on average 2.721844516701153) internal successors, (9208), 3383 states have internal predecessors, (9208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3384 states to 3384 states and 9208 transitions. [2020-11-11 14:44:03,665 INFO L78 Accepts]: Start accepts. Automaton has 3384 states and 9208 transitions. Word has length 58 [2020-11-11 14:44:03,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:03,665 INFO L481 AbstractCegarLoop]: Abstraction has 3384 states and 9208 transitions. [2020-11-11 14:44:03,666 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) [2020-11-11 14:44:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3384 states and 9208 transitions. [2020-11-11 14:44:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:03,669 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:03,669 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] [2020-11-11 14:44:03,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-11-11 14:44:03,883 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:03,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:03,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1461407977, now seen corresponding path program 36 times [2020-11-11 14:44:03,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:03,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003120128] [2020-11-11 14:44:03,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:04,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003120128] [2020-11-11 14:44:04,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796080585] [2020-11-11 14:44:04,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:04,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:44:04,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:04,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:04,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:04,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:04,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:04,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:04,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819731950] [2020-11-11 14:44:04,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:04,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:04,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:04,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:04,388 INFO L87 Difference]: Start difference. First operand 3384 states and 9208 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) [2020-11-11 14:44:05,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:05,154 INFO L93 Difference]: Finished difference Result 5269 states and 13449 transitions. [2020-11-11 14:44:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 14:44:05,154 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 [2020-11-11 14:44:05,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:05,161 INFO L225 Difference]: With dead ends: 5269 [2020-11-11 14:44:05,161 INFO L226 Difference]: Without dead ends: 5117 [2020-11-11 14:44:05,161 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 14:44:05,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2020-11-11 14:44:05,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 3424. [2020-11-11 14:44:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3423 states have (on average 2.714869997078586) internal successors, (9293), 3423 states have internal predecessors, (9293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 9293 transitions. [2020-11-11 14:44:05,213 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 9293 transitions. Word has length 58 [2020-11-11 14:44:05,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:05,213 INFO L481 AbstractCegarLoop]: Abstraction has 3424 states and 9293 transitions. [2020-11-11 14:44:05,214 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) [2020-11-11 14:44:05,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 9293 transitions. [2020-11-11 14:44:05,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:05,217 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:05,217 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] [2020-11-11 14:44:05,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:05,418 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:05,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:05,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1034597009, now seen corresponding path program 37 times [2020-11-11 14:44:05,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:05,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328347380] [2020-11-11 14:44:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:05,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328347380] [2020-11-11 14:44:05,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917271502] [2020-11-11 14:44:05,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 14:44:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:05,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:05,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:05,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:05,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:05,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:05,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371062270] [2020-11-11 14:44:05,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:05,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:05,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:05,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:05,987 INFO L87 Difference]: Start difference. First operand 3424 states and 9293 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) [2020-11-11 14:44:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:06,858 INFO L93 Difference]: Finished difference Result 5492 states and 14050 transitions. [2020-11-11 14:44:06,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 14:44:06,859 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 [2020-11-11 14:44:06,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:06,866 INFO L225 Difference]: With dead ends: 5492 [2020-11-11 14:44:06,866 INFO L226 Difference]: Without dead ends: 5100 [2020-11-11 14:44:06,866 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=377, Invalid=1183, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 14:44:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5100 states. [2020-11-11 14:44:06,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5100 to 3364. [2020-11-11 14:44:06,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3364 states, 3363 states have (on average 2.7225691347011596) internal successors, (9156), 3363 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:06,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3364 states to 3364 states and 9156 transitions. [2020-11-11 14:44:06,956 INFO L78 Accepts]: Start accepts. Automaton has 3364 states and 9156 transitions. Word has length 58 [2020-11-11 14:44:06,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:06,957 INFO L481 AbstractCegarLoop]: Abstraction has 3364 states and 9156 transitions. [2020-11-11 14:44:06,957 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) [2020-11-11 14:44:06,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3364 states and 9156 transitions. [2020-11-11 14:44:06,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:06,960 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:06,961 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] [2020-11-11 14:44:07,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-11 14:44:07,161 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:07,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:07,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1248612077, now seen corresponding path program 38 times [2020-11-11 14:44:07,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:07,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171790681] [2020-11-11 14:44:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:07,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171790681] [2020-11-11 14:44:07,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62224404] [2020-11-11 14:44:07,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:07,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:44:07,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:07,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:07,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:07,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:07,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:07,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:07,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559811415] [2020-11-11 14:44:07,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:07,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:07,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:07,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:07,744 INFO L87 Difference]: Start difference. First operand 3364 states and 9156 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) [2020-11-11 14:44:08,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:08,575 INFO L93 Difference]: Finished difference Result 5286 states and 13488 transitions. [2020-11-11 14:44:08,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 14:44:08,576 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 [2020-11-11 14:44:08,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:08,582 INFO L225 Difference]: With dead ends: 5286 [2020-11-11 14:44:08,582 INFO L226 Difference]: Without dead ends: 5134 [2020-11-11 14:44:08,583 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=365, Invalid=1041, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 14:44:08,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5134 states. [2020-11-11 14:44:08,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5134 to 3459. [2020-11-11 14:44:08,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 2.7082128397917873) internal successors, (9365), 3458 states have internal predecessors, (9365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 9365 transitions. [2020-11-11 14:44:08,636 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 9365 transitions. Word has length 58 [2020-11-11 14:44:08,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:08,636 INFO L481 AbstractCegarLoop]: Abstraction has 3459 states and 9365 transitions. [2020-11-11 14:44:08,636 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) [2020-11-11 14:44:08,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 9365 transitions. [2020-11-11 14:44:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:08,639 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:08,639 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] [2020-11-11 14:44:08,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-11 14:44:08,840 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:08,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:08,841 INFO L82 PathProgramCache]: Analyzing trace with hash 279428363, now seen corresponding path program 39 times [2020-11-11 14:44:08,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:08,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109206008] [2020-11-11 14:44:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:09,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109206008] [2020-11-11 14:44:09,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911121286] [2020-11-11 14:44:09,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:09,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 14:44:09,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:09,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:09,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:09,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:09,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:09,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:09,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576537776] [2020-11-11 14:44:09,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:09,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:09,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:09,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:09,385 INFO L87 Difference]: Start difference. First operand 3459 states and 9365 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) [2020-11-11 14:44:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:10,362 INFO L93 Difference]: Finished difference Result 5504 states and 13926 transitions. [2020-11-11 14:44:10,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 14:44:10,362 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 [2020-11-11 14:44:10,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:10,369 INFO L225 Difference]: With dead ends: 5504 [2020-11-11 14:44:10,369 INFO L226 Difference]: Without dead ends: 5352 [2020-11-11 14:44:10,369 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 14:44:10,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5352 states. [2020-11-11 14:44:10,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5352 to 3529. [2020-11-11 14:44:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3529 states, 3528 states have (on average 2.697278911564626) internal successors, (9516), 3528 states have internal predecessors, (9516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 9516 transitions. [2020-11-11 14:44:10,424 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 9516 transitions. Word has length 58 [2020-11-11 14:44:10,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:10,425 INFO L481 AbstractCegarLoop]: Abstraction has 3529 states and 9516 transitions. [2020-11-11 14:44:10,425 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) [2020-11-11 14:44:10,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 9516 transitions. [2020-11-11 14:44:10,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:10,430 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:10,430 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] [2020-11-11 14:44:10,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:10,645 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:10,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:10,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1519533947, now seen corresponding path program 40 times [2020-11-11 14:44:10,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:10,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921946316] [2020-11-11 14:44:10,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:10,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921946316] [2020-11-11 14:44:10,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670254170] [2020-11-11 14:44:10,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:10,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:44:10,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:10,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:10,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:11,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:11,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:11,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:11,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056590060] [2020-11-11 14:44:11,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:11,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:11,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:11,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:11,354 INFO L87 Difference]: Start difference. First operand 3529 states and 9516 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) [2020-11-11 14:44:12,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:12,278 INFO L93 Difference]: Finished difference Result 5544 states and 14014 transitions. [2020-11-11 14:44:12,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 14:44:12,279 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 [2020-11-11 14:44:12,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:12,286 INFO L225 Difference]: With dead ends: 5544 [2020-11-11 14:44:12,286 INFO L226 Difference]: Without dead ends: 5392 [2020-11-11 14:44:12,286 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=432, Invalid=1208, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 14:44:12,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5392 states. [2020-11-11 14:44:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5392 to 3504. [2020-11-11 14:44:12,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3504 states, 3503 states have (on average 2.7016842706251785) internal successors, (9464), 3503 states have internal predecessors, (9464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:12,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3504 states to 3504 states and 9464 transitions. [2020-11-11 14:44:12,343 INFO L78 Accepts]: Start accepts. Automaton has 3504 states and 9464 transitions. Word has length 58 [2020-11-11 14:44:12,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:12,343 INFO L481 AbstractCegarLoop]: Abstraction has 3504 states and 9464 transitions. [2020-11-11 14:44:12,343 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) [2020-11-11 14:44:12,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3504 states and 9464 transitions. [2020-11-11 14:44:12,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:12,346 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:12,346 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] [2020-11-11 14:44:12,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-11 14:44:12,547 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:12,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:12,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1847336437, now seen corresponding path program 12 times [2020-11-11 14:44:12,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:12,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899912798] [2020-11-11 14:44:12,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:12,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899912798] [2020-11-11 14:44:12,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250320605] [2020-11-11 14:44:12,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:12,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 14:44:12,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:12,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:12,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:13,033 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:13,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:13,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:13,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970903431] [2020-11-11 14:44:13,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:13,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:13,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:13,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:13,069 INFO L87 Difference]: Start difference. First operand 3504 states and 9464 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) [2020-11-11 14:44:14,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:14,062 INFO L93 Difference]: Finished difference Result 5504 states and 14062 transitions. [2020-11-11 14:44:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:44:14,063 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 [2020-11-11 14:44:14,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:14,070 INFO L225 Difference]: With dead ends: 5504 [2020-11-11 14:44:14,070 INFO L226 Difference]: Without dead ends: 5112 [2020-11-11 14:44:14,070 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 14:44:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5112 states. [2020-11-11 14:44:14,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5112 to 3588. [2020-11-11 14:44:14,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3588 states, 3587 states have (on average 2.686367437970449) internal successors, (9636), 3587 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 9636 transitions. [2020-11-11 14:44:14,123 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 9636 transitions. Word has length 58 [2020-11-11 14:44:14,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:14,124 INFO L481 AbstractCegarLoop]: Abstraction has 3588 states and 9636 transitions. [2020-11-11 14:44:14,124 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) [2020-11-11 14:44:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 9636 transitions. [2020-11-11 14:44:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:14,127 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:14,127 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] [2020-11-11 14:44:14,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-11 14:44:14,328 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:14,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:14,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1499500443, now seen corresponding path program 41 times [2020-11-11 14:44:14,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:14,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096802322] [2020-11-11 14:44:14,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:14,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096802322] [2020-11-11 14:44:14,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128269402] [2020-11-11 14:44:14,497 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 [2020-11-11 14:44:14,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:44:14,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:14,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:14,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:14,879 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:14,883 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:14,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:14,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:14,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:14,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862557473] [2020-11-11 14:44:14,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:14,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:14,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:14,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:14,936 INFO L87 Difference]: Start difference. First operand 3588 states and 9636 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) [2020-11-11 14:44:15,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:15,916 INFO L93 Difference]: Finished difference Result 5205 states and 13321 transitions. [2020-11-11 14:44:15,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 14:44:15,917 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 [2020-11-11 14:44:15,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:15,923 INFO L225 Difference]: With dead ends: 5205 [2020-11-11 14:44:15,923 INFO L226 Difference]: Without dead ends: 5053 [2020-11-11 14:44:15,923 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=342, Invalid=990, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 14:44:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5053 states. [2020-11-11 14:44:15,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5053 to 3513. [2020-11-11 14:44:15,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.696753986332574) internal successors, (9471), 3512 states have internal predecessors, (9471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:15,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9471 transitions. [2020-11-11 14:44:15,976 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9471 transitions. Word has length 58 [2020-11-11 14:44:15,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:15,976 INFO L481 AbstractCegarLoop]: Abstraction has 3513 states and 9471 transitions. [2020-11-11 14:44:15,976 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) [2020-11-11 14:44:15,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9471 transitions. [2020-11-11 14:44:15,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:15,979 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:15,979 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] [2020-11-11 14:44:16,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-11 14:44:16,180 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:16,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:16,181 INFO L82 PathProgramCache]: Analyzing trace with hash -275535283, now seen corresponding path program 13 times [2020-11-11 14:44:16,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:16,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794873696] [2020-11-11 14:44:16,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:16,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794873696] [2020-11-11 14:44:16,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160365709] [2020-11-11 14:44:16,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:16,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:16,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:16,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:16,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:16,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661727937] [2020-11-11 14:44:16,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:16,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:16,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:16,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:16,734 INFO L87 Difference]: Start difference. First operand 3513 states and 9471 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) [2020-11-11 14:44:17,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:17,514 INFO L93 Difference]: Finished difference Result 5838 states and 14720 transitions. [2020-11-11 14:44:17,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 14:44:17,515 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 [2020-11-11 14:44:17,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:17,521 INFO L225 Difference]: With dead ends: 5838 [2020-11-11 14:44:17,522 INFO L226 Difference]: Without dead ends: 5446 [2020-11-11 14:44:17,522 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 14:44:17,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5446 states. [2020-11-11 14:44:17,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5446 to 3563. [2020-11-11 14:44:17,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3563 states, 3562 states have (on average 2.68978102189781) internal successors, (9581), 3562 states have internal predecessors, (9581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 9581 transitions. [2020-11-11 14:44:17,579 INFO L78 Accepts]: Start accepts. Automaton has 3563 states and 9581 transitions. Word has length 58 [2020-11-11 14:44:17,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:17,580 INFO L481 AbstractCegarLoop]: Abstraction has 3563 states and 9581 transitions. [2020-11-11 14:44:17,580 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) [2020-11-11 14:44:17,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3563 states and 9581 transitions. [2020-11-11 14:44:17,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:17,583 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:17,583 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] [2020-11-11 14:44:17,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:17,784 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:17,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2118264511, now seen corresponding path program 42 times [2020-11-11 14:44:17,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:17,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747274843] [2020-11-11 14:44:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:17,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747274843] [2020-11-11 14:44:17,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276412005] [2020-11-11 14:44:17,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 14:44:18,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:44:18,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:18,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:18,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:18,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:18,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:18,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:18,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:18,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:18,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741949947] [2020-11-11 14:44:18,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:18,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:18,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:18,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:18,401 INFO L87 Difference]: Start difference. First operand 3563 states and 9581 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) [2020-11-11 14:44:19,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:19,249 INFO L93 Difference]: Finished difference Result 5758 states and 14432 transitions. [2020-11-11 14:44:19,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 14:44:19,249 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 [2020-11-11 14:44:19,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:19,281 INFO L225 Difference]: With dead ends: 5758 [2020-11-11 14:44:19,281 INFO L226 Difference]: Without dead ends: 5606 [2020-11-11 14:44:19,282 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 14:44:19,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5606 states. [2020-11-11 14:44:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5606 to 3563. [2020-11-11 14:44:19,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3563 states, 3562 states have (on average 2.68978102189781) internal successors, (9581), 3562 states have internal predecessors, (9581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 9581 transitions. [2020-11-11 14:44:19,333 INFO L78 Accepts]: Start accepts. Automaton has 3563 states and 9581 transitions. Word has length 58 [2020-11-11 14:44:19,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:19,334 INFO L481 AbstractCegarLoop]: Abstraction has 3563 states and 9581 transitions. [2020-11-11 14:44:19,334 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) [2020-11-11 14:44:19,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3563 states and 9581 transitions. [2020-11-11 14:44:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:19,337 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:19,338 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] [2020-11-11 14:44:19,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:19,538 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:19,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:19,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1778586907, now seen corresponding path program 43 times [2020-11-11 14:44:19,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:19,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111655207] [2020-11-11 14:44:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:19,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111655207] [2020-11-11 14:44:19,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113400827] [2020-11-11 14:44:19,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:19,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:19,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:20,062 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:20,064 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:20,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:20,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:20,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:20,070 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:20,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:20,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:20,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:20,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:20,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243977921] [2020-11-11 14:44:20,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:20,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:20,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:20,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:20,154 INFO L87 Difference]: Start difference. First operand 3563 states and 9581 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) [2020-11-11 14:44:20,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:20,946 INFO L93 Difference]: Finished difference Result 5783 states and 14487 transitions. [2020-11-11 14:44:20,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 14:44:20,947 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 [2020-11-11 14:44:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:20,953 INFO L225 Difference]: With dead ends: 5783 [2020-11-11 14:44:20,953 INFO L226 Difference]: Without dead ends: 5631 [2020-11-11 14:44:20,954 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=875, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 14:44:20,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5631 states. [2020-11-11 14:44:21,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5631 to 3603. [2020-11-11 14:44:21,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3603 states, 3602 states have (on average 2.6835091615769016) internal successors, (9666), 3602 states have internal predecessors, (9666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:21,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 9666 transitions. [2020-11-11 14:44:21,012 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 9666 transitions. Word has length 58 [2020-11-11 14:44:21,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:21,012 INFO L481 AbstractCegarLoop]: Abstraction has 3603 states and 9666 transitions. [2020-11-11 14:44:21,012 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) [2020-11-11 14:44:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 9666 transitions. [2020-11-11 14:44:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:21,016 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:21,016 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] [2020-11-11 14:44:21,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:21,217 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:21,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:21,217 INFO L82 PathProgramCache]: Analyzing trace with hash -652287283, now seen corresponding path program 44 times [2020-11-11 14:44:21,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:21,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095478611] [2020-11-11 14:44:21,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:21,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095478611] [2020-11-11 14:44:21,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933642736] [2020-11-11 14:44:21,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:21,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:44:21,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:21,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:21,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:21,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:21,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:21,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:21,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241475452] [2020-11-11 14:44:21,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:21,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:21,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:21,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:21,727 INFO L87 Difference]: Start difference. First operand 3603 states and 9666 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) [2020-11-11 14:44:22,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:22,697 INFO L93 Difference]: Finished difference Result 5919 states and 14759 transitions. [2020-11-11 14:44:22,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 14:44:22,698 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 [2020-11-11 14:44:22,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:22,705 INFO L225 Difference]: With dead ends: 5919 [2020-11-11 14:44:22,705 INFO L226 Difference]: Without dead ends: 5767 [2020-11-11 14:44:22,706 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=413, Invalid=1227, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 14:44:22,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5767 states. [2020-11-11 14:44:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5767 to 3613. [2020-11-11 14:44:22,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.683001107419712) internal successors, (9691), 3612 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:22,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 9691 transitions. [2020-11-11 14:44:22,771 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 9691 transitions. Word has length 58 [2020-11-11 14:44:22,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:22,771 INFO L481 AbstractCegarLoop]: Abstraction has 3613 states and 9691 transitions. [2020-11-11 14:44:22,771 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) [2020-11-11 14:44:22,772 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 9691 transitions. [2020-11-11 14:44:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:22,775 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:22,775 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] [2020-11-11 14:44:22,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:22,976 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:22,977 INFO L82 PathProgramCache]: Analyzing trace with hash 875753157, now seen corresponding path program 45 times [2020-11-11 14:44:22,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:22,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434526425] [2020-11-11 14:44:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:23,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434526425] [2020-11-11 14:44:23,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690437330] [2020-11-11 14:44:23,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:23,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 14:44:23,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:23,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:23,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:23,514 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:23,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:23,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:23,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476659752] [2020-11-11 14:44:23,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:23,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:23,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:23,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:23,550 INFO L87 Difference]: Start difference. First operand 3613 states and 9691 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) [2020-11-11 14:44:24,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:24,480 INFO L93 Difference]: Finished difference Result 5909 states and 14729 transitions. [2020-11-11 14:44:24,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 14:44:24,480 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 [2020-11-11 14:44:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:24,487 INFO L225 Difference]: With dead ends: 5909 [2020-11-11 14:44:24,487 INFO L226 Difference]: Without dead ends: 5757 [2020-11-11 14:44:24,488 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=409, Invalid=1151, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 14:44:24,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5757 states. [2020-11-11 14:44:24,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5757 to 3653. [2020-11-11 14:44:24,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.6768893756845564) internal successors, (9776), 3652 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 9776 transitions. [2020-11-11 14:44:24,547 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 9776 transitions. Word has length 58 [2020-11-11 14:44:24,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:24,548 INFO L481 AbstractCegarLoop]: Abstraction has 3653 states and 9776 transitions. [2020-11-11 14:44:24,548 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) [2020-11-11 14:44:24,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 9776 transitions. [2020-11-11 14:44:24,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:24,551 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:24,551 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] [2020-11-11 14:44:24,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-11-11 14:44:24,753 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:24,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:24,753 INFO L82 PathProgramCache]: Analyzing trace with hash -923209153, now seen corresponding path program 46 times [2020-11-11 14:44:24,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:24,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753180202] [2020-11-11 14:44:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:24,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753180202] [2020-11-11 14:44:24,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860223572] [2020-11-11 14:44:24,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:25,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:44:25,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:25,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:25,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:25,318 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:25,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:25,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:25,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889824337] [2020-11-11 14:44:25,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:25,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:25,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:25,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:25,362 INFO L87 Difference]: Start difference. First operand 3653 states and 9776 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) [2020-11-11 14:44:26,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:26,598 INFO L93 Difference]: Finished difference Result 6154 states and 15372 transitions. [2020-11-11 14:44:26,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 14:44:26,598 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 [2020-11-11 14:44:26,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:26,605 INFO L225 Difference]: With dead ends: 6154 [2020-11-11 14:44:26,606 INFO L226 Difference]: Without dead ends: 5762 [2020-11-11 14:44:26,606 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 14:44:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5762 states. [2020-11-11 14:44:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5762 to 3563. [2020-11-11 14:44:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3563 states, 3562 states have (on average 2.68978102189781) internal successors, (9581), 3562 states have internal predecessors, (9581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 9581 transitions. [2020-11-11 14:44:26,665 INFO L78 Accepts]: Start accepts. Automaton has 3563 states and 9581 transitions. Word has length 58 [2020-11-11 14:44:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:26,666 INFO L481 AbstractCegarLoop]: Abstraction has 3563 states and 9581 transitions. [2020-11-11 14:44:26,666 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) [2020-11-11 14:44:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3563 states and 9581 transitions. [2020-11-11 14:44:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:26,669 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:26,669 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] [2020-11-11 14:44:26,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:26,870 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:26,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:26,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1570928371, now seen corresponding path program 14 times [2020-11-11 14:44:26,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:26,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437978742] [2020-11-11 14:44:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:26,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:27,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437978742] [2020-11-11 14:44:27,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282622101] [2020-11-11 14:44:27,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:27,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:44:27,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:27,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:27,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:27,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:27,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:27,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:27,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760913300] [2020-11-11 14:44:27,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:27,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:27,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:27,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:27,477 INFO L87 Difference]: Start difference. First operand 3563 states and 9581 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) [2020-11-11 14:44:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:28,266 INFO L93 Difference]: Finished difference Result 6078 states and 15200 transitions. [2020-11-11 14:44:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 14:44:28,267 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 [2020-11-11 14:44:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:28,274 INFO L225 Difference]: With dead ends: 6078 [2020-11-11 14:44:28,274 INFO L226 Difference]: Without dead ends: 5686 [2020-11-11 14:44:28,274 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=326, Invalid=1006, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 14:44:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2020-11-11 14:44:28,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3613. [2020-11-11 14:44:28,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.683001107419712) internal successors, (9691), 3612 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 9691 transitions. [2020-11-11 14:44:28,332 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 9691 transitions. Word has length 58 [2020-11-11 14:44:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:28,332 INFO L481 AbstractCegarLoop]: Abstraction has 3613 states and 9691 transitions. [2020-11-11 14:44:28,332 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) [2020-11-11 14:44:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 9691 transitions. [2020-11-11 14:44:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:28,335 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:28,335 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] [2020-11-11 14:44:28,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-11-11 14:44:28,536 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:28,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:28,537 INFO L82 PathProgramCache]: Analyzing trace with hash -271800857, now seen corresponding path program 47 times [2020-11-11 14:44:28,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:28,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121351788] [2020-11-11 14:44:28,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:28,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121351788] [2020-11-11 14:44:28,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560801347] [2020-11-11 14:44:28,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:28,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:44:28,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:28,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:28,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:29,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:29,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:29,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:29,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:29,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:29,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75372560] [2020-11-11 14:44:29,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:29,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:29,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:29,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:29,139 INFO L87 Difference]: Start difference. First operand 3613 states and 9691 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) [2020-11-11 14:44:30,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:30,039 INFO L93 Difference]: Finished difference Result 5998 states and 14912 transitions. [2020-11-11 14:44:30,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 14:44:30,040 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 [2020-11-11 14:44:30,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:30,046 INFO L225 Difference]: With dead ends: 5998 [2020-11-11 14:44:30,047 INFO L226 Difference]: Without dead ends: 5846 [2020-11-11 14:44:30,047 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=349, Invalid=983, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 14:44:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2020-11-11 14:44:30,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 3613. [2020-11-11 14:44:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.683001107419712) internal successors, (9691), 3612 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 9691 transitions. [2020-11-11 14:44:30,105 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 9691 transitions. Word has length 58 [2020-11-11 14:44:30,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:30,106 INFO L481 AbstractCegarLoop]: Abstraction has 3613 states and 9691 transitions. [2020-11-11 14:44:30,106 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) [2020-11-11 14:44:30,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 9691 transitions. [2020-11-11 14:44:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:30,109 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:30,109 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] [2020-11-11 14:44:30,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:30,310 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:30,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:30,311 INFO L82 PathProgramCache]: Analyzing trace with hash -669916735, now seen corresponding path program 48 times [2020-11-11 14:44:30,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:30,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215839564] [2020-11-11 14:44:30,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:30,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215839564] [2020-11-11 14:44:30,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240006917] [2020-11-11 14:44:30,484 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:30,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:44:30,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:30,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:30,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:30,823 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:30,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:30,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:30,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:30,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:30,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:30,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:30,847 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:30,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:30,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:30,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720824120] [2020-11-11 14:44:30,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:30,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:30,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:30,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:30,928 INFO L87 Difference]: Start difference. First operand 3613 states and 9691 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) [2020-11-11 14:44:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:31,801 INFO L93 Difference]: Finished difference Result 6063 states and 15047 transitions. [2020-11-11 14:44:31,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 14:44:31,802 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 [2020-11-11 14:44:31,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:31,810 INFO L225 Difference]: With dead ends: 6063 [2020-11-11 14:44:31,810 INFO L226 Difference]: Without dead ends: 5911 [2020-11-11 14:44:31,811 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=323, Invalid=937, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 14:44:31,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2020-11-11 14:44:31,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 3653. [2020-11-11 14:44:31,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.6768893756845564) internal successors, (9776), 3652 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 9776 transitions. [2020-11-11 14:44:31,884 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 9776 transitions. Word has length 58 [2020-11-11 14:44:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:31,884 INFO L481 AbstractCegarLoop]: Abstraction has 3653 states and 9776 transitions. [2020-11-11 14:44:31,884 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) [2020-11-11 14:44:31,884 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 9776 transitions. [2020-11-11 14:44:31,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:31,888 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:31,889 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] [2020-11-11 14:44:32,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-11-11 14:44:32,090 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:32,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:32,090 INFO L82 PathProgramCache]: Analyzing trace with hash -222045555, now seen corresponding path program 15 times [2020-11-11 14:44:32,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:32,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963580836] [2020-11-11 14:44:32,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:32,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963580836] [2020-11-11 14:44:32,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281348962] [2020-11-11 14:44:32,278 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:32,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 14:44:32,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:32,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:32,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:32,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:32,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:32,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:32,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185725896] [2020-11-11 14:44:32,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:32,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:32,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:32,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:32,655 INFO L87 Difference]: Start difference. First operand 3653 states and 9776 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) [2020-11-11 14:44:33,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:33,521 INFO L93 Difference]: Finished difference Result 6333 states and 15720 transitions. [2020-11-11 14:44:33,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 14:44:33,521 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 [2020-11-11 14:44:33,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:33,529 INFO L225 Difference]: With dead ends: 6333 [2020-11-11 14:44:33,529 INFO L226 Difference]: Without dead ends: 5941 [2020-11-11 14:44:33,529 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=1066, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 14:44:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5941 states. [2020-11-11 14:44:33,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5941 to 3690. [2020-11-11 14:44:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3690 states, 3689 states have (on average 2.6736242884250476) internal successors, (9863), 3689 states have internal predecessors, (9863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3690 states to 3690 states and 9863 transitions. [2020-11-11 14:44:33,590 INFO L78 Accepts]: Start accepts. Automaton has 3690 states and 9863 transitions. Word has length 58 [2020-11-11 14:44:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:33,590 INFO L481 AbstractCegarLoop]: Abstraction has 3690 states and 9863 transitions. [2020-11-11 14:44:33,590 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) [2020-11-11 14:44:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3690 states and 9863 transitions. [2020-11-11 14:44:33,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:33,595 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:33,595 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] [2020-11-11 14:44:33,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:33,809 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:33,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:33,809 INFO L82 PathProgramCache]: Analyzing trace with hash 752745849, now seen corresponding path program 16 times [2020-11-11 14:44:33,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:33,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388111218] [2020-11-11 14:44:33,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:33,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388111218] [2020-11-11 14:44:33,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502575148] [2020-11-11 14:44:33,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:34,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:44:34,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:34,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 14:44:34,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:34,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:34,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:34,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:34,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544391603] [2020-11-11 14:44:34,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:34,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:34,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:34,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:34,351 INFO L87 Difference]: Start difference. First operand 3690 states and 9863 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) [2020-11-11 14:44:35,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:44:35,480 INFO L93 Difference]: Finished difference Result 7374 states and 18584 transitions. [2020-11-11 14:44:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 14:44:35,481 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 [2020-11-11 14:44:35,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:44:35,490 INFO L225 Difference]: With dead ends: 7374 [2020-11-11 14:44:35,490 INFO L226 Difference]: Without dead ends: 6982 [2020-11-11 14:44:35,490 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=424, Invalid=1382, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 14:44:35,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6982 states. [2020-11-11 14:44:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6982 to 4010. [2020-11-11 14:44:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4010 states, 4009 states have (on average 2.705662259915191) internal successors, (10847), 4009 states have internal predecessors, (10847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:44:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4010 states to 4010 states and 10847 transitions. [2020-11-11 14:44:35,565 INFO L78 Accepts]: Start accepts. Automaton has 4010 states and 10847 transitions. Word has length 58 [2020-11-11 14:44:35,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:44:35,565 INFO L481 AbstractCegarLoop]: Abstraction has 4010 states and 10847 transitions. [2020-11-11 14:44:35,565 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) [2020-11-11 14:44:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4010 states and 10847 transitions. [2020-11-11 14:44:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:44:35,569 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:44:35,569 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] [2020-11-11 14:44:35,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:35,770 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:44:35,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:44:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash -205434563, now seen corresponding path program 17 times [2020-11-11 14:44:35,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:44:35,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144394956] [2020-11-11 14:44:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:44:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:44:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:35,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144394956] [2020-11-11 14:44:35,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2811587] [2020-11-11 14:44:35,963 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:44:36,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 14:44:36,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:44:36,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:44:36,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:44:36,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:44:36,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:44:36,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:44:38,499 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-11-11 14:44:38,525 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:44:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:44:38,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:44:38,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:44:38,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904276385] [2020-11-11 14:44:38,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:44:38,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:44:38,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:44:38,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:44:38,700 INFO L87 Difference]: Start difference. First operand 4010 states and 10847 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) [2020-11-11 14:44:41,276 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 51 [2020-11-11 14:44:43,423 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-11-11 14:44:47,534 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 48 [2020-11-11 14:44:50,777 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-11-11 14:45:04,743 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-11-11 14:45:08,604 WARN L193 SmtUtils]: Spent 3.72 s on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-11 14:45:19,382 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 50 [2020-11-11 14:46:45,598 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 38 [2020-11-11 14:46:45,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:46:45,831 INFO L93 Difference]: Finished difference Result 8968 states and 22925 transitions. [2020-11-11 14:46:45,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 14:46:45,832 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 [2020-11-11 14:46:45,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:46:45,843 INFO L225 Difference]: With dead ends: 8968 [2020-11-11 14:46:45,843 INFO L226 Difference]: Without dead ends: 8306 [2020-11-11 14:46:45,846 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=673, Invalid=2287, Unknown=10, NotChecked=0, Total=2970 [2020-11-11 14:46:45,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8306 states. [2020-11-11 14:46:45,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8306 to 3901. [2020-11-11 14:46:45,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 2.6953846153846155) internal successors, (10512), 3900 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:46:45,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 10512 transitions. [2020-11-11 14:46:45,927 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 10512 transitions. Word has length 58 [2020-11-11 14:46:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:46:45,927 INFO L481 AbstractCegarLoop]: Abstraction has 3901 states and 10512 transitions. [2020-11-11 14:46:45,927 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) [2020-11-11 14:46:45,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 10512 transitions. [2020-11-11 14:46:45,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:46:45,930 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:46:45,931 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] [2020-11-11 14:46:46,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-11-11 14:46:46,131 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:46:46,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:46:46,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1922075013, now seen corresponding path program 49 times [2020-11-11 14:46:46,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:46:46,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804178587] [2020-11-11 14:46:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:46:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:46:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:46:46,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804178587] [2020-11-11 14:46:46,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15725389] [2020-11-11 14:46:46,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:46:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:46:46,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:46:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:46:46,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:46:46,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:46:46,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:46:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:46:46,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:46:46,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:46:46,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417815000] [2020-11-11 14:46:46,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:46:46,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:46:46,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:46:46,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:46:46,882 INFO L87 Difference]: Start difference. First operand 3901 states and 10512 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) [2020-11-11 14:46:48,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:46:48,287 INFO L93 Difference]: Finished difference Result 7265 states and 18177 transitions. [2020-11-11 14:46:48,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 14:46:48,288 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:46:48,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:46:48,297 INFO L225 Difference]: With dead ends: 7265 [2020-11-11 14:46:48,297 INFO L226 Difference]: Without dead ends: 7113 [2020-11-11 14:46:48,298 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 14:46:48,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2020-11-11 14:46:48,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 4026. [2020-11-11 14:46:48,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 2.709813664596273) internal successors, (10907), 4025 states have internal predecessors, (10907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:46:48,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 10907 transitions. [2020-11-11 14:46:48,370 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 10907 transitions. Word has length 58 [2020-11-11 14:46:48,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:46:48,370 INFO L481 AbstractCegarLoop]: Abstraction has 4026 states and 10907 transitions. [2020-11-11 14:46:48,370 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) [2020-11-11 14:46:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 10907 transitions. [2020-11-11 14:46:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:46:48,374 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:46:48,374 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] [2020-11-11 14:46:48,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:46:48,575 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:46:48,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:46:48,575 INFO L82 PathProgramCache]: Analyzing trace with hash -537285371, now seen corresponding path program 50 times [2020-11-11 14:46:48,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:46:48,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655241419] [2020-11-11 14:46:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:46:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:46:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:46:48,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655241419] [2020-11-11 14:46:48,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671728683] [2020-11-11 14:46:48,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:46:48,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:46:48,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:46:48,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:46:48,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:46:49,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:46:49,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:46:49,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:46:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:46:49,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:46:49,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:46:49,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290765826] [2020-11-11 14:46:49,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:46:49,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:46:49,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:46:49,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:46:49,346 INFO L87 Difference]: Start difference. First operand 4026 states and 10907 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) [2020-11-11 14:46:50,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:46:50,899 INFO L93 Difference]: Finished difference Result 7461 states and 19117 transitions. [2020-11-11 14:46:50,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 14:46:50,901 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 [2020-11-11 14:46:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:46:50,913 INFO L225 Difference]: With dead ends: 7461 [2020-11-11 14:46:50,913 INFO L226 Difference]: Without dead ends: 7309 [2020-11-11 14:46:50,914 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=445, Invalid=1361, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 14:46:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7309 states. [2020-11-11 14:46:51,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7309 to 4161. [2020-11-11 14:46:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4161 states, 4160 states have (on average 2.728846153846154) internal successors, (11352), 4160 states have internal predecessors, (11352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:46:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4161 states to 4161 states and 11352 transitions. [2020-11-11 14:46:51,011 INFO L78 Accepts]: Start accepts. Automaton has 4161 states and 11352 transitions. Word has length 58 [2020-11-11 14:46:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:46:51,012 INFO L481 AbstractCegarLoop]: Abstraction has 4161 states and 11352 transitions. [2020-11-11 14:46:51,012 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) [2020-11-11 14:46:51,012 INFO L276 IsEmpty]: Start isEmpty. Operand 4161 states and 11352 transitions. [2020-11-11 14:46:51,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:46:51,016 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:46:51,016 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] [2020-11-11 14:46:51,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:46:51,217 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:46:51,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:46:51,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1495465783, now seen corresponding path program 51 times [2020-11-11 14:46:51,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:46:51,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947228358] [2020-11-11 14:46:51,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:46:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:46:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:46:51,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947228358] [2020-11-11 14:46:51,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261951740] [2020-11-11 14:46:51,445 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:46:51,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 14:46:51,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:46:51,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:46:51,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:46:51,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:46:52,064 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:46:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:46:52,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:46:52,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:46:52,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830522823] [2020-11-11 14:46:52,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:46:52,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:46:52,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:46:52,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:46:52,075 INFO L87 Difference]: Start difference. First operand 4161 states and 11352 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:46:54,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:46:54,471 INFO L93 Difference]: Finished difference Result 8594 states and 22273 transitions. [2020-11-11 14:46:54,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 14:46:54,472 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:46:54,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:46:54,483 INFO L225 Difference]: With dead ends: 8594 [2020-11-11 14:46:54,483 INFO L226 Difference]: Without dead ends: 8230 [2020-11-11 14:46:54,484 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=693, Invalid=2169, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 14:46:54,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2020-11-11 14:46:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 3851. [2020-11-11 14:46:54,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3851 states, 3850 states have (on average 2.6862337662337663) internal successors, (10342), 3850 states have internal predecessors, (10342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:46:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3851 states to 3851 states and 10342 transitions. [2020-11-11 14:46:54,565 INFO L78 Accepts]: Start accepts. Automaton has 3851 states and 10342 transitions. Word has length 58 [2020-11-11 14:46:54,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:46:54,565 INFO L481 AbstractCegarLoop]: Abstraction has 3851 states and 10342 transitions. [2020-11-11 14:46:54,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:46:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3851 states and 10342 transitions. [2020-11-11 14:46:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:46:54,571 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:46:54,571 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] [2020-11-11 14:46:54,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-11-11 14:46:54,784 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:46:54,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:46:54,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1565216441, now seen corresponding path program 52 times [2020-11-11 14:46:54,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:46:54,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574183985] [2020-11-11 14:46:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:46:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:46:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:46:55,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574183985] [2020-11-11 14:46:55,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513597161] [2020-11-11 14:46:55,008 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:46:55,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:46:55,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:46:55,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 14:46:55,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:46:55,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:46:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:46:55,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:46:55,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:46:55,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393732796] [2020-11-11 14:46:55,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:46:55,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:46:55,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:46:55,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:46:55,449 INFO L87 Difference]: Start difference. First operand 3851 states and 10342 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) [2020-11-11 14:46:56,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:46:56,950 INFO L93 Difference]: Finished difference Result 7314 states and 18139 transitions. [2020-11-11 14:46:56,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 14:46:56,951 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 [2020-11-11 14:46:56,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:46:56,960 INFO L225 Difference]: With dead ends: 7314 [2020-11-11 14:46:56,960 INFO L226 Difference]: Without dead ends: 7162 [2020-11-11 14:46:56,960 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=479, Invalid=1591, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 14:46:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7162 states. [2020-11-11 14:46:57,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7162 to 4081. [2020-11-11 14:46:57,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4081 states, 4080 states have (on average 2.711029411764706) internal successors, (11061), 4080 states have internal predecessors, (11061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:46:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4081 states to 4081 states and 11061 transitions. [2020-11-11 14:46:57,030 INFO L78 Accepts]: Start accepts. Automaton has 4081 states and 11061 transitions. Word has length 58 [2020-11-11 14:46:57,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:46:57,030 INFO L481 AbstractCegarLoop]: Abstraction has 4081 states and 11061 transitions. [2020-11-11 14:46:57,030 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) [2020-11-11 14:46:57,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4081 states and 11061 transitions. [2020-11-11 14:46:57,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:46:57,034 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:46:57,034 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] [2020-11-11 14:46:57,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:46:57,235 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:46:57,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:46:57,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1201710415, now seen corresponding path program 53 times [2020-11-11 14:46:57,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:46:57,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327701637] [2020-11-11 14:46:57,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:46:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:46:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:46:57,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327701637] [2020-11-11 14:46:57,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612579064] [2020-11-11 14:46:57,456 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:46:57,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:46:57,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:46:57,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:46:57,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:46:57,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:46:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:46:57,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:46:57,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:46:57,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986829510] [2020-11-11 14:46:57,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:46:57,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:46:57,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:46:57,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:46:57,844 INFO L87 Difference]: Start difference. First operand 4081 states and 11061 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) [2020-11-11 14:46:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:46:59,226 INFO L93 Difference]: Finished difference Result 7325 states and 18166 transitions. [2020-11-11 14:46:59,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 14:46:59,227 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 [2020-11-11 14:46:59,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:46:59,236 INFO L225 Difference]: With dead ends: 7325 [2020-11-11 14:46:59,236 INFO L226 Difference]: Without dead ends: 7173 [2020-11-11 14:46:59,237 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=463, Invalid=1517, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 14:46:59,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7173 states. [2020-11-11 14:46:59,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7173 to 4116. [2020-11-11 14:46:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 4115 states have (on average 2.713487241798299) internal successors, (11166), 4115 states have internal predecessors, (11166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:46:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 11166 transitions. [2020-11-11 14:46:59,314 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 11166 transitions. Word has length 58 [2020-11-11 14:46:59,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:46:59,314 INFO L481 AbstractCegarLoop]: Abstraction has 4116 states and 11166 transitions. [2020-11-11 14:46:59,314 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) [2020-11-11 14:46:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 11166 transitions. [2020-11-11 14:46:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:46:59,318 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:46:59,318 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] [2020-11-11 14:46:59,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-11-11 14:46:59,519 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:46:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:46:59,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1294294571, now seen corresponding path program 54 times [2020-11-11 14:46:59,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:46:59,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050307357] [2020-11-11 14:46:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:46:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:46:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:46:59,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050307357] [2020-11-11 14:46:59,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408151021] [2020-11-11 14:46:59,747 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:46:59,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:46:59,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:46:59,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:46:59,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:47:00,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:47:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:00,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:47:00,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:47:00,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127747115] [2020-11-11 14:47:00,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:47:00,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:47:00,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:47:00,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:47:00,173 INFO L87 Difference]: Start difference. First operand 4116 states and 11166 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) [2020-11-11 14:47:01,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:47:01,995 INFO L93 Difference]: Finished difference Result 7691 states and 19048 transitions. [2020-11-11 14:47:01,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 14:47:01,996 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 [2020-11-11 14:47:01,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:47:02,004 INFO L225 Difference]: With dead ends: 7691 [2020-11-11 14:47:02,004 INFO L226 Difference]: Without dead ends: 7299 [2020-11-11 14:47:02,005 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=560, Invalid=1990, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 14:47:02,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7299 states. [2020-11-11 14:47:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7299 to 4041. [2020-11-11 14:47:02,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4041 states, 4040 states have (on average 2.723019801980198) internal successors, (11001), 4040 states have internal predecessors, (11001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:47:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4041 states to 4041 states and 11001 transitions. [2020-11-11 14:47:02,078 INFO L78 Accepts]: Start accepts. Automaton has 4041 states and 11001 transitions. Word has length 58 [2020-11-11 14:47:02,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:47:02,078 INFO L481 AbstractCegarLoop]: Abstraction has 4041 states and 11001 transitions. [2020-11-11 14:47:02,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:47:02,078 INFO L276 IsEmpty]: Start isEmpty. Operand 4041 states and 11001 transitions. [2020-11-11 14:47:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:47:02,082 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:47:02,082 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] [2020-11-11 14:47:02,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-11-11 14:47:02,282 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:47:02,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:47:02,283 INFO L82 PathProgramCache]: Analyzing trace with hash 573546095, now seen corresponding path program 55 times [2020-11-11 14:47:02,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:47:02,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340778958] [2020-11-11 14:47:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:47:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:47:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:02,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340778958] [2020-11-11 14:47:02,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512130392] [2020-11-11 14:47:02,493 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:47:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:47:02,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:47:02,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:47:02,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:47:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:02,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:47:02,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:47:02,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241345722] [2020-11-11 14:47:02,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:47:02,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:47:02,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:47:02,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:47:02,911 INFO L87 Difference]: Start difference. First operand 4041 states and 11001 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) [2020-11-11 14:47:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:47:04,639 INFO L93 Difference]: Finished difference Result 7369 states and 18554 transitions. [2020-11-11 14:47:04,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 14:47:04,640 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 [2020-11-11 14:47:04,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:47:04,650 INFO L225 Difference]: With dead ends: 7369 [2020-11-11 14:47:04,651 INFO L226 Difference]: Without dead ends: 7217 [2020-11-11 14:47:04,651 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=565, Invalid=1787, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 14:47:04,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7217 states. [2020-11-11 14:47:04,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7217 to 4141. [2020-11-11 14:47:04,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4141 states, 4140 states have (on average 2.7393719806763284) internal successors, (11341), 4140 states have internal predecessors, (11341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:47:04,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4141 states to 4141 states and 11341 transitions. [2020-11-11 14:47:04,730 INFO L78 Accepts]: Start accepts. Automaton has 4141 states and 11341 transitions. Word has length 58 [2020-11-11 14:47:04,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:47:04,730 INFO L481 AbstractCegarLoop]: Abstraction has 4141 states and 11341 transitions. [2020-11-11 14:47:04,730 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) [2020-11-11 14:47:04,730 INFO L276 IsEmpty]: Start isEmpty. Operand 4141 states and 11341 transitions. [2020-11-11 14:47:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:47:04,734 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:47:04,734 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] [2020-11-11 14:47:04,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-11-11 14:47:04,935 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:47:04,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:47:04,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2101586535, now seen corresponding path program 56 times [2020-11-11 14:47:04,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:47:04,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288173216] [2020-11-11 14:47:04,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:47:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:47:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:05,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288173216] [2020-11-11 14:47:05,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767939079] [2020-11-11 14:47:05,156 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:47:05,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:47:05,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:47:05,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:47:05,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:47:05,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:47:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:05,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:47:05,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:47:05,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304538261] [2020-11-11 14:47:05,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:47:05,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:47:05,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:47:05,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:47:05,532 INFO L87 Difference]: Start difference. First operand 4141 states and 11341 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) [2020-11-11 14:47:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:47:07,003 INFO L93 Difference]: Finished difference Result 7262 states and 18470 transitions. [2020-11-11 14:47:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 14:47:07,004 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 [2020-11-11 14:47:07,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:47:07,014 INFO L225 Difference]: With dead ends: 7262 [2020-11-11 14:47:07,014 INFO L226 Difference]: Without dead ends: 7110 [2020-11-11 14:47:07,015 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 14:47:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7110 states. [2020-11-11 14:47:07,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7110 to 4196. [2020-11-11 14:47:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4196 states, 4195 states have (on average 2.7499404052443386) internal successors, (11536), 4195 states have internal predecessors, (11536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:47:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4196 states to 4196 states and 11536 transitions. [2020-11-11 14:47:07,133 INFO L78 Accepts]: Start accepts. Automaton has 4196 states and 11536 transitions. Word has length 58 [2020-11-11 14:47:07,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:47:07,133 INFO L481 AbstractCegarLoop]: Abstraction has 4196 states and 11536 transitions. [2020-11-11 14:47:07,133 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) [2020-11-11 14:47:07,133 INFO L276 IsEmpty]: Start isEmpty. Operand 4196 states and 11536 transitions. [2020-11-11 14:47:07,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:47:07,138 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:47:07,138 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] [2020-11-11 14:47:07,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:47:07,340 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:47:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:47:07,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1958335737, now seen corresponding path program 57 times [2020-11-11 14:47:07,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:47:07,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346125740] [2020-11-11 14:47:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:47:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:47:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:07,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346125740] [2020-11-11 14:47:07,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931466559] [2020-11-11 14:47:07,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:47:07,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 14:47:07,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:47:07,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:47:07,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:47:07,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:47:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:07,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:47:07,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:47:07,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381240449] [2020-11-11 14:47:07,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:47:07,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:47:07,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:47:07,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:47:07,995 INFO L87 Difference]: Start difference. First operand 4196 states and 11536 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) [2020-11-11 14:47:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:47:09,642 INFO L93 Difference]: Finished difference Result 7622 states and 19695 transitions. [2020-11-11 14:47:09,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 14:47:09,644 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 [2020-11-11 14:47:09,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:47:09,658 INFO L225 Difference]: With dead ends: 7622 [2020-11-11 14:47:09,658 INFO L226 Difference]: Without dead ends: 7470 [2020-11-11 14:47:09,659 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 14:47:09,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7470 states. [2020-11-11 14:47:09,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7470 to 4326. [2020-11-11 14:47:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 4325 states have (on average 2.764393063583815) internal successors, (11956), 4325 states have internal predecessors, (11956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:47:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 11956 transitions. [2020-11-11 14:47:09,804 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 11956 transitions. Word has length 58 [2020-11-11 14:47:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:47:09,806 INFO L481 AbstractCegarLoop]: Abstraction has 4326 states and 11956 transitions. [2020-11-11 14:47:09,806 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) [2020-11-11 14:47:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 11956 transitions. [2020-11-11 14:47:09,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:47:09,813 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:47:09,813 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] [2020-11-11 14:47:10,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:47:10,026 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:47:10,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:47:10,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1000155325, now seen corresponding path program 58 times [2020-11-11 14:47:10,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:47:10,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537978691] [2020-11-11 14:47:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:47:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:47:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:10,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537978691] [2020-11-11 14:47:10,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509465082] [2020-11-11 14:47:10,234 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:47:10,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:47:10,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:47:10,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 14:47:10,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:47:10,572 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:47:10,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:47:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:10,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:47:10,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:47:10,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589955641] [2020-11-11 14:47:10,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:47:10,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:47:10,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:47:10,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:47:10,644 INFO L87 Difference]: Start difference. First operand 4326 states and 11956 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:47:13,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:47:13,027 INFO L93 Difference]: Finished difference Result 8858 states and 23109 transitions. [2020-11-11 14:47:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 14:47:13,028 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:47:13,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:47:13,038 INFO L225 Difference]: With dead ends: 8858 [2020-11-11 14:47:13,038 INFO L226 Difference]: Without dead ends: 8494 [2020-11-11 14:47:13,038 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=801, Invalid=2621, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 14:47:13,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8494 states. [2020-11-11 14:47:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8494 to 4268. [2020-11-11 14:47:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4268 states, 4267 states have (on average 2.7541598312631828) internal successors, (11752), 4267 states have internal predecessors, (11752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:47:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4268 states to 4268 states and 11752 transitions. [2020-11-11 14:47:13,154 INFO L78 Accepts]: Start accepts. Automaton has 4268 states and 11752 transitions. Word has length 58 [2020-11-11 14:47:13,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:47:13,154 INFO L481 AbstractCegarLoop]: Abstraction has 4268 states and 11752 transitions. [2020-11-11 14:47:13,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:47:13,155 INFO L276 IsEmpty]: Start isEmpty. Operand 4268 states and 11752 transitions. [2020-11-11 14:47:13,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:47:13,158 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:47:13,158 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] [2020-11-11 14:47:13,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:47:13,359 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:47:13,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:47:13,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2082949121, now seen corresponding path program 59 times [2020-11-11 14:47:13,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:47:13,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723154225] [2020-11-11 14:47:13,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:47:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:47:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:13,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723154225] [2020-11-11 14:47:13,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363103316] [2020-11-11 14:47:13,589 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:47:13,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:47:13,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:47:13,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:47:13,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:47:13,979 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:47:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:13,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:47:13,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:47:13,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335101790] [2020-11-11 14:47:13,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:47:13,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:47:13,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:47:13,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:47:13,988 INFO L87 Difference]: Start difference. First operand 4268 states and 11752 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) [2020-11-11 14:47:15,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:47:15,862 INFO L93 Difference]: Finished difference Result 7614 states and 19807 transitions. [2020-11-11 14:47:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 14:47:15,863 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 [2020-11-11 14:47:15,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:47:15,872 INFO L225 Difference]: With dead ends: 7614 [2020-11-11 14:47:15,872 INFO L226 Difference]: Without dead ends: 7462 [2020-11-11 14:47:15,873 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 14:47:15,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7462 states. [2020-11-11 14:47:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7462 to 4398. [2020-11-11 14:47:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4398 states, 4397 states have (on average 2.7682510802820106) internal successors, (12172), 4397 states have internal predecessors, (12172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:47:15,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4398 states to 4398 states and 12172 transitions. [2020-11-11 14:47:15,954 INFO L78 Accepts]: Start accepts. Automaton has 4398 states and 12172 transitions. Word has length 58 [2020-11-11 14:47:15,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:47:15,955 INFO L481 AbstractCegarLoop]: Abstraction has 4398 states and 12172 transitions. [2020-11-11 14:47:15,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:47:15,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4398 states and 12172 transitions. [2020-11-11 14:47:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:47:15,959 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:47:15,959 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] [2020-11-11 14:47:16,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:47:16,161 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:47:16,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:47:16,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1124768709, now seen corresponding path program 60 times [2020-11-11 14:47:16,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:47:16,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200931828] [2020-11-11 14:47:16,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:47:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:47:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:16,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200931828] [2020-11-11 14:47:16,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017272860] [2020-11-11 14:47:16,393 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:47:16,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:47:16,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:47:16,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:47:16,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:47:16,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:47:16,719 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:47:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:16,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:47:16,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:47:16,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488386895] [2020-11-11 14:47:16,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:47:16,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:47:16,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:47:16,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:47:16,728 INFO L87 Difference]: Start difference. First operand 4398 states and 12172 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:47:19,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:47:19,305 INFO L93 Difference]: Finished difference Result 9117 states and 23937 transitions. [2020-11-11 14:47:19,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-11 14:47:19,306 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:47:19,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:47:19,351 INFO L225 Difference]: With dead ends: 9117 [2020-11-11 14:47:19,351 INFO L226 Difference]: Without dead ends: 8753 [2020-11-11 14:47:19,352 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=989, Invalid=3301, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 14:47:19,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8753 states. [2020-11-11 14:47:19,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8753 to 4078. [2020-11-11 14:47:19,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4078 states, 4077 states have (on average 2.740250183958793) internal successors, (11172), 4077 states have internal predecessors, (11172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:47:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4078 states to 4078 states and 11172 transitions. [2020-11-11 14:47:19,424 INFO L78 Accepts]: Start accepts. Automaton has 4078 states and 11172 transitions. Word has length 58 [2020-11-11 14:47:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:47:19,424 INFO L481 AbstractCegarLoop]: Abstraction has 4078 states and 11172 transitions. [2020-11-11 14:47:19,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:47:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 4078 states and 11172 transitions. [2020-11-11 14:47:19,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:47:19,428 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:47:19,428 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] [2020-11-11 14:47:19,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-11-11 14:47:19,629 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:47:19,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:47:19,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1175613017, now seen corresponding path program 61 times [2020-11-11 14:47:19,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:47:19,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458161224] [2020-11-11 14:47:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:47:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:47:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:19,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458161224] [2020-11-11 14:47:19,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449635902] [2020-11-11 14:47:19,876 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:47:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:47:19,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:47:19,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:47:20,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:47:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:20,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:47:20,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:47:20,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854210900] [2020-11-11 14:47:20,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:47:20,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:47:20,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:47:20,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:47:20,320 INFO L87 Difference]: Start difference. First operand 4078 states and 11172 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) [2020-11-11 14:47:22,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:47:22,459 INFO L93 Difference]: Finished difference Result 7818 states and 19707 transitions. [2020-11-11 14:47:22,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 14:47:22,460 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 [2020-11-11 14:47:22,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:47:22,470 INFO L225 Difference]: With dead ends: 7818 [2020-11-11 14:47:22,471 INFO L226 Difference]: Without dead ends: 7426 [2020-11-11 14:47:22,471 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=687, Invalid=2393, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 14:47:22,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2020-11-11 14:47:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 4148. [2020-11-11 14:47:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4148 states, 4147 states have (on average 2.763684591270798) internal successors, (11461), 4147 states have internal predecessors, (11461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:47:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4148 states to 4148 states and 11461 transitions. [2020-11-11 14:47:22,553 INFO L78 Accepts]: Start accepts. Automaton has 4148 states and 11461 transitions. Word has length 58 [2020-11-11 14:47:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:47:22,553 INFO L481 AbstractCegarLoop]: Abstraction has 4148 states and 11461 transitions. [2020-11-11 14:47:22,553 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) [2020-11-11 14:47:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4148 states and 11461 transitions. [2020-11-11 14:47:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:47:22,558 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:47:22,558 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] [2020-11-11 14:47:22,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:47:22,759 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:47:22,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:47:22,760 INFO L82 PathProgramCache]: Analyzing trace with hash -2145274937, now seen corresponding path program 62 times [2020-11-11 14:47:22,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:47:22,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713885907] [2020-11-11 14:47:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:47:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:47:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:22,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713885907] [2020-11-11 14:47:22,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865306076] [2020-11-11 14:47:22,996 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:47:23,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:47:23,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:47:23,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:47:23,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:47:23,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:47:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:23,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:47:23,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:47:23,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124285655] [2020-11-11 14:47:23,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:47:23,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:47:23,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:47:23,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:47:23,425 INFO L87 Difference]: Start difference. First operand 4148 states and 11461 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) [2020-11-11 14:47:25,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:47:25,621 INFO L93 Difference]: Finished difference Result 7479 states and 19394 transitions. [2020-11-11 14:47:25,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 14:47:25,622 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 [2020-11-11 14:47:25,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:47:25,631 INFO L225 Difference]: With dead ends: 7479 [2020-11-11 14:47:25,631 INFO L226 Difference]: Without dead ends: 7087 [2020-11-11 14:47:25,631 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=656, Invalid=2314, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 14:47:25,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7087 states. [2020-11-11 14:47:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7087 to 4328. [2020-11-11 14:47:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4328 states, 4327 states have (on average 2.7813727755951003) internal successors, (12035), 4327 states have internal predecessors, (12035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:47:25,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4328 states to 4328 states and 12035 transitions. [2020-11-11 14:47:25,705 INFO L78 Accepts]: Start accepts. Automaton has 4328 states and 12035 transitions. Word has length 58 [2020-11-11 14:47:25,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:47:25,705 INFO L481 AbstractCegarLoop]: Abstraction has 4328 states and 12035 transitions. [2020-11-11 14:47:25,705 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) [2020-11-11 14:47:25,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4328 states and 12035 transitions. [2020-11-11 14:47:25,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:47:25,710 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:47:25,710 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] [2020-11-11 14:47:25,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:47:25,911 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:47:25,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:47:25,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1191511947, now seen corresponding path program 63 times [2020-11-11 14:47:25,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:47:25,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865781317] [2020-11-11 14:47:25,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:47:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:47:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:26,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865781317] [2020-11-11 14:47:26,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135416494] [2020-11-11 14:47:26,137 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:47:26,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 14:47:26,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:47:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:47:26,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:47:26,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:47:32,660 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-11 14:47:32,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:47:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:47:32,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:47:32,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:47:32,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326655569] [2020-11-11 14:47:32,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:47:32,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:47:32,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:47:32,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=319, Unknown=2, NotChecked=0, Total=420 [2020-11-11 14:47:32,677 INFO L87 Difference]: Start difference. First operand 4328 states and 12035 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) [2020-11-11 14:47:35,207 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 28 [2020-11-11 14:47:39,384 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-11 14:47:43,927 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-11-11 14:47:50,112 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 30 [2020-11-11 14:47:56,314 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-11-11 14:48:00,432 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 26 [2020-11-11 14:49:27,786 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-11-11 14:50:22,947 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-11-11 14:51:03,786 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-11-11 14:51:56,631 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-11-11 14:53:58,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:53:58,231 INFO L93 Difference]: Finished difference Result 9166 states and 23742 transitions. [2020-11-11 14:53:58,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-11-11 14:53:58,233 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 [2020-11-11 14:53:58,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:53:58,245 INFO L225 Difference]: With dead ends: 9166 [2020-11-11 14:53:58,245 INFO L226 Difference]: Without dead ends: 8626 [2020-11-11 14:53:58,246 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 90.3s TimeCoverageRelationStatistics Valid=995, Invalid=3403, Unknown=24, NotChecked=0, Total=4422 [2020-11-11 14:53:58,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8626 states. [2020-11-11 14:53:58,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8626 to 4148. [2020-11-11 14:53:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4148 states, 4147 states have (on average 2.759826380516036) internal successors, (11445), 4147 states have internal predecessors, (11445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:53:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4148 states to 4148 states and 11445 transitions. [2020-11-11 14:53:58,333 INFO L78 Accepts]: Start accepts. Automaton has 4148 states and 11445 transitions. Word has length 58 [2020-11-11 14:53:58,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:53:58,334 INFO L481 AbstractCegarLoop]: Abstraction has 4148 states and 11445 transitions. [2020-11-11 14:53:58,334 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) [2020-11-11 14:53:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4148 states and 11445 transitions. [2020-11-11 14:53:58,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:53:58,337 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:53:58,337 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] [2020-11-11 14:53:58,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:58,538 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:53:58,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:53:58,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1895122259, now seen corresponding path program 64 times [2020-11-11 14:53:58,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:53:58,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320230969] [2020-11-11 14:53:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:53:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:53:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:58,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320230969] [2020-11-11 14:53:58,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066840440] [2020-11-11 14:53:58,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:53:58,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:53:58,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:53:58,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 14:53:58,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:53:59,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:59,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:59,442 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:53:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:53:59,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:53:59,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:53:59,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252628269] [2020-11-11 14:53:59,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:53:59,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:53:59,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:53:59,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:53:59,531 INFO L87 Difference]: Start difference. First operand 4148 states and 11445 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) [2020-11-11 14:54:01,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:01,968 INFO L93 Difference]: Finished difference Result 7100 states and 18408 transitions. [2020-11-11 14:54:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 14:54:01,970 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 [2020-11-11 14:54:01,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:01,979 INFO L225 Difference]: With dead ends: 7100 [2020-11-11 14:54:01,980 INFO L226 Difference]: Without dead ends: 6948 [2020-11-11 14:54:01,980 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=548, Invalid=1804, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 14:54:01,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6948 states. [2020-11-11 14:54:02,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6948 to 4228. [2020-11-11 14:54:02,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.7667376389874616) internal successors, (11695), 4227 states have internal predecessors, (11695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11695 transitions. [2020-11-11 14:54:02,059 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11695 transitions. Word has length 58 [2020-11-11 14:54:02,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:02,059 INFO L481 AbstractCegarLoop]: Abstraction has 4228 states and 11695 transitions. [2020-11-11 14:54:02,059 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) [2020-11-11 14:54:02,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11695 transitions. [2020-11-11 14:54:02,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:02,064 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:02,064 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] [2020-11-11 14:54:02,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:02,265 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:02,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:02,266 INFO L82 PathProgramCache]: Analyzing trace with hash 936941847, now seen corresponding path program 65 times [2020-11-11 14:54:02,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:02,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607251497] [2020-11-11 14:54:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:02,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607251497] [2020-11-11 14:54:02,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126520706] [2020-11-11 14:54:02,521 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:02,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:54:02,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:02,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:02,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:03,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:54:03,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:03,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:03,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:54:03,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325309415] [2020-11-11 14:54:03,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:54:03,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:03,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:54:03,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:54:03,159 INFO L87 Difference]: Start difference. First operand 4228 states and 11695 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:06,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:06,437 INFO L93 Difference]: Finished difference Result 8268 states and 21808 transitions. [2020-11-11 14:54:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 14:54:06,438 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:54:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:06,451 INFO L225 Difference]: With dead ends: 8268 [2020-11-11 14:54:06,451 INFO L226 Difference]: Without dead ends: 7904 [2020-11-11 14:54:06,452 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=753, Invalid=2553, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 14:54:06,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7904 states. [2020-11-11 14:54:06,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7904 to 3998. [2020-11-11 14:54:06,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3998 states, 3997 states have (on average 2.7358018513885414) internal successors, (10935), 3997 states have internal predecessors, (10935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3998 states to 3998 states and 10935 transitions. [2020-11-11 14:54:06,545 INFO L78 Accepts]: Start accepts. Automaton has 3998 states and 10935 transitions. Word has length 58 [2020-11-11 14:54:06,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:06,545 INFO L481 AbstractCegarLoop]: Abstraction has 3998 states and 10935 transitions. [2020-11-11 14:54:06,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:06,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3998 states and 10935 transitions. [2020-11-11 14:54:06,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:06,549 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:06,549 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] [2020-11-11 14:54:06,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-11-11 14:54:06,751 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:06,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:06,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1055059259, now seen corresponding path program 66 times [2020-11-11 14:54:06,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:06,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844120669] [2020-11-11 14:54:06,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:07,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844120669] [2020-11-11 14:54:07,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677073110] [2020-11-11 14:54:07,043 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:07,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 14:54:07,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:07,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:07,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:07,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:07,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:07,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:54:07,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098609429] [2020-11-11 14:54:07,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:54:07,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:07,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:54:07,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:54:07,606 INFO L87 Difference]: Start difference. First operand 3998 states and 10935 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) [2020-11-11 14:54:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:09,442 INFO L93 Difference]: Finished difference Result 7090 states and 17629 transitions. [2020-11-11 14:54:09,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 14:54:09,444 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 [2020-11-11 14:54:09,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:09,455 INFO L225 Difference]: With dead ends: 7090 [2020-11-11 14:54:09,455 INFO L226 Difference]: Without dead ends: 6938 [2020-11-11 14:54:09,455 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 14:54:09,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6938 states. [2020-11-11 14:54:09,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6938 to 4168. [2020-11-11 14:54:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4168 states, 4167 states have (on average 2.728341732661387) internal successors, (11369), 4167 states have internal predecessors, (11369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 11369 transitions. [2020-11-11 14:54:09,539 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 11369 transitions. Word has length 58 [2020-11-11 14:54:09,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:09,539 INFO L481 AbstractCegarLoop]: Abstraction has 4168 states and 11369 transitions. [2020-11-11 14:54:09,540 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) [2020-11-11 14:54:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 11369 transitions. [2020-11-11 14:54:09,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:09,544 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:09,544 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] [2020-11-11 14:54:09,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-11 14:54:09,745 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:09,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:09,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1711867597, now seen corresponding path program 67 times [2020-11-11 14:54:09,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:09,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577954177] [2020-11-11 14:54:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:10,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577954177] [2020-11-11 14:54:10,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461530654] [2020-11-11 14:54:10,029 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:10,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:10,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:10,541 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:10,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:10,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:54:10,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017500133] [2020-11-11 14:54:10,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:54:10,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:10,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:54:10,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:54:10,591 INFO L87 Difference]: Start difference. First operand 4168 states and 11369 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) [2020-11-11 14:54:12,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:12,714 INFO L93 Difference]: Finished difference Result 7244 states and 17939 transitions. [2020-11-11 14:54:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 14:54:12,715 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 [2020-11-11 14:54:12,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:12,728 INFO L225 Difference]: With dead ends: 7244 [2020-11-11 14:54:12,728 INFO L226 Difference]: Without dead ends: 7092 [2020-11-11 14:54:12,728 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=518, Invalid=1738, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 14:54:12,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7092 states. [2020-11-11 14:54:12,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7092 to 4198. [2020-11-11 14:54:12,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4198 states, 4197 states have (on average 2.724565165594472) internal successors, (11435), 4197 states have internal predecessors, (11435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:12,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 11435 transitions. [2020-11-11 14:54:12,819 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 11435 transitions. Word has length 58 [2020-11-11 14:54:12,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:12,819 INFO L481 AbstractCegarLoop]: Abstraction has 4198 states and 11435 transitions. [2020-11-11 14:54:12,819 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) [2020-11-11 14:54:12,820 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 11435 transitions. [2020-11-11 14:54:12,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:12,824 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:12,824 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] [2020-11-11 14:54:13,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:13,025 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:13,025 INFO L82 PathProgramCache]: Analyzing trace with hash 784137389, now seen corresponding path program 68 times [2020-11-11 14:54:13,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:13,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480273594] [2020-11-11 14:54:13,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:13,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480273594] [2020-11-11 14:54:13,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121097554] [2020-11-11 14:54:13,405 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:13,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:54:13,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:13,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:13,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:13,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:13,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:13,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:54:13,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142413559] [2020-11-11 14:54:13,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:54:13,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:13,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:54:13,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:54:13,977 INFO L87 Difference]: Start difference. First operand 4198 states and 11435 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) [2020-11-11 14:54:15,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:15,994 INFO L93 Difference]: Finished difference Result 6960 states and 17399 transitions. [2020-11-11 14:54:15,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 14:54:15,996 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 [2020-11-11 14:54:15,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:16,005 INFO L225 Difference]: With dead ends: 6960 [2020-11-11 14:54:16,005 INFO L226 Difference]: Without dead ends: 6808 [2020-11-11 14:54:16,005 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 14:54:16,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6808 states. [2020-11-11 14:54:16,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6808 to 4213. [2020-11-11 14:54:16,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.7226970560303894) internal successors, (11468), 4212 states have internal predecessors, (11468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:16,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 11468 transitions. [2020-11-11 14:54:16,082 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 11468 transitions. Word has length 58 [2020-11-11 14:54:16,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:16,082 INFO L481 AbstractCegarLoop]: Abstraction has 4213 states and 11468 transitions. [2020-11-11 14:54:16,082 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) [2020-11-11 14:54:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 11468 transitions. [2020-11-11 14:54:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:16,087 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:16,087 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] [2020-11-11 14:54:16,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:16,287 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:16,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:16,288 INFO L82 PathProgramCache]: Analyzing trace with hash 456334899, now seen corresponding path program 18 times [2020-11-11 14:54:16,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:16,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531040354] [2020-11-11 14:54:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:16,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531040354] [2020-11-11 14:54:16,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571158712] [2020-11-11 14:54:16,568 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:16,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 14:54:16,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:16,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:16,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:17,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:17,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:17,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:54:17,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551785750] [2020-11-11 14:54:17,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:54:17,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:17,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:54:17,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:54:17,091 INFO L87 Difference]: Start difference. First operand 4213 states and 11468 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) [2020-11-11 14:54:18,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:18,893 INFO L93 Difference]: Finished difference Result 7197 states and 17975 transitions. [2020-11-11 14:54:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 14:54:18,895 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 [2020-11-11 14:54:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:18,904 INFO L225 Difference]: With dead ends: 7197 [2020-11-11 14:54:18,904 INFO L226 Difference]: Without dead ends: 6805 [2020-11-11 14:54:18,905 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=435, Invalid=1635, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 14:54:18,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6805 states. [2020-11-11 14:54:18,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6805 to 4190. [2020-11-11 14:54:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4190 states, 4189 states have (on average 2.7302458820720936) internal successors, (11437), 4189 states have internal predecessors, (11437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:18,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4190 states to 4190 states and 11437 transitions. [2020-11-11 14:54:18,980 INFO L78 Accepts]: Start accepts. Automaton has 4190 states and 11437 transitions. Word has length 58 [2020-11-11 14:54:18,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:18,980 INFO L481 AbstractCegarLoop]: Abstraction has 4190 states and 11437 transitions. [2020-11-11 14:54:18,980 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) [2020-11-11 14:54:18,980 INFO L276 IsEmpty]: Start isEmpty. Operand 4190 states and 11437 transitions. [2020-11-11 14:54:18,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:18,985 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:18,985 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] [2020-11-11 14:54:19,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:19,186 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:19,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:19,187 INFO L82 PathProgramCache]: Analyzing trace with hash -303431867, now seen corresponding path program 69 times [2020-11-11 14:54:19,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:19,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517537893] [2020-11-11 14:54:19,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:19,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517537893] [2020-11-11 14:54:19,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112405663] [2020-11-11 14:54:19,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:19,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 14:54:19,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:19,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:19,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:20,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:20,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:20,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:54:20,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954716211] [2020-11-11 14:54:20,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:54:20,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:20,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:54:20,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:54:20,073 INFO L87 Difference]: Start difference. First operand 4190 states and 11437 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) [2020-11-11 14:54:22,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:22,491 INFO L93 Difference]: Finished difference Result 7203 states and 18132 transitions. [2020-11-11 14:54:22,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 14:54:22,493 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 [2020-11-11 14:54:22,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:22,503 INFO L225 Difference]: With dead ends: 7203 [2020-11-11 14:54:22,503 INFO L226 Difference]: Without dead ends: 7051 [2020-11-11 14:54:22,504 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 14:54:22,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2020-11-11 14:54:22,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 4315. [2020-11-11 14:54:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4315 states, 4314 states have (on average 2.7357440890125173) internal successors, (11802), 4314 states have internal predecessors, (11802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:22,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4315 states to 4315 states and 11802 transitions. [2020-11-11 14:54:22,616 INFO L78 Accepts]: Start accepts. Automaton has 4315 states and 11802 transitions. Word has length 58 [2020-11-11 14:54:22,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:22,616 INFO L481 AbstractCegarLoop]: Abstraction has 4315 states and 11802 transitions. [2020-11-11 14:54:22,616 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) [2020-11-11 14:54:22,616 INFO L276 IsEmpty]: Start isEmpty. Operand 4315 states and 11802 transitions. [2020-11-11 14:54:22,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:22,620 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:22,621 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] [2020-11-11 14:54:22,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:22,821 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:22,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:22,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1224608573, now seen corresponding path program 70 times [2020-11-11 14:54:22,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:22,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980168477] [2020-11-11 14:54:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:23,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980168477] [2020-11-11 14:54:23,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702228811] [2020-11-11 14:54:23,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:23,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:54:23,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:23,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 14:54:23,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:23,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:23,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:23,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:54:23,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844808035] [2020-11-11 14:54:23,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:54:23,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:23,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:54:23,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:54:23,670 INFO L87 Difference]: Start difference. First operand 4315 states and 11802 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) [2020-11-11 14:54:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:26,202 INFO L93 Difference]: Finished difference Result 7544 states and 18925 transitions. [2020-11-11 14:54:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 14:54:26,203 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 [2020-11-11 14:54:26,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:26,213 INFO L225 Difference]: With dead ends: 7544 [2020-11-11 14:54:26,213 INFO L226 Difference]: Without dead ends: 7392 [2020-11-11 14:54:26,214 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 14:54:26,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7392 states. [2020-11-11 14:54:26,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7392 to 4415. [2020-11-11 14:54:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4415 states, 4414 states have (on average 2.7403715450838244) internal successors, (12096), 4414 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:26,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4415 states to 4415 states and 12096 transitions. [2020-11-11 14:54:26,300 INFO L78 Accepts]: Start accepts. Automaton has 4415 states and 12096 transitions. Word has length 58 [2020-11-11 14:54:26,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:26,300 INFO L481 AbstractCegarLoop]: Abstraction has 4415 states and 12096 transitions. [2020-11-11 14:54:26,301 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) [2020-11-11 14:54:26,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4415 states and 12096 transitions. [2020-11-11 14:54:26,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:26,306 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:26,306 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] [2020-11-11 14:54:26,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:26,507 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:26,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:26,508 INFO L82 PathProgramCache]: Analyzing trace with hash -574353737, now seen corresponding path program 71 times [2020-11-11 14:54:26,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:26,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279121612] [2020-11-11 14:54:26,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:26,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279121612] [2020-11-11 14:54:26,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724120388] [2020-11-11 14:54:26,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:26,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:54:26,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:26,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:26,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:27,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:27,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:27,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:54:27,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408925088] [2020-11-11 14:54:27,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:54:27,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:27,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:54:27,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:54:27,233 INFO L87 Difference]: Start difference. First operand 4415 states and 12096 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) [2020-11-11 14:54:29,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:29,540 INFO L93 Difference]: Finished difference Result 7694 states and 19283 transitions. [2020-11-11 14:54:29,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 14:54:29,543 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 [2020-11-11 14:54:29,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:29,554 INFO L225 Difference]: With dead ends: 7694 [2020-11-11 14:54:29,555 INFO L226 Difference]: Without dead ends: 7542 [2020-11-11 14:54:29,555 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=530, Invalid=1822, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 14:54:29,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7542 states. [2020-11-11 14:54:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7542 to 4415. [2020-11-11 14:54:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4415 states, 4414 states have (on average 2.7539646579066606) internal successors, (12156), 4414 states have internal predecessors, (12156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4415 states to 4415 states and 12156 transitions. [2020-11-11 14:54:29,655 INFO L78 Accepts]: Start accepts. Automaton has 4415 states and 12156 transitions. Word has length 58 [2020-11-11 14:54:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:29,655 INFO L481 AbstractCegarLoop]: Abstraction has 4415 states and 12156 transitions. [2020-11-11 14:54:29,655 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) [2020-11-11 14:54:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 4415 states and 12156 transitions. [2020-11-11 14:54:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:29,660 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:29,660 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] [2020-11-11 14:54:29,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:29,861 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:29,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:29,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1295102213, now seen corresponding path program 72 times [2020-11-11 14:54:29,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:29,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034938667] [2020-11-11 14:54:29,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:30,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034938667] [2020-11-11 14:54:30,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035565859] [2020-11-11 14:54:30,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:30,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 14:54:30,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:30,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:30,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:30,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:30,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:30,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:54:30,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86015431] [2020-11-11 14:54:30,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:54:30,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:30,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:54:30,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:54:30,709 INFO L87 Difference]: Start difference. First operand 4415 states and 12156 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) [2020-11-11 14:54:32,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:32,961 INFO L93 Difference]: Finished difference Result 7556 states and 19280 transitions. [2020-11-11 14:54:32,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 14:54:32,963 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 [2020-11-11 14:54:32,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:32,973 INFO L225 Difference]: With dead ends: 7556 [2020-11-11 14:54:32,973 INFO L226 Difference]: Without dead ends: 7404 [2020-11-11 14:54:32,974 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=604, Invalid=2048, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 14:54:32,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7404 states. [2020-11-11 14:54:33,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7404 to 4500. [2020-11-11 14:54:33,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4500 states, 4499 states have (on average 2.7635030006668146) internal successors, (12433), 4499 states have internal predecessors, (12433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:33,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4500 states to 4500 states and 12433 transitions. [2020-11-11 14:54:33,060 INFO L78 Accepts]: Start accepts. Automaton has 4500 states and 12433 transitions. Word has length 58 [2020-11-11 14:54:33,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:33,060 INFO L481 AbstractCegarLoop]: Abstraction has 4500 states and 12433 transitions. [2020-11-11 14:54:33,060 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) [2020-11-11 14:54:33,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4500 states and 12433 transitions. [2020-11-11 14:54:33,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:33,065 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:33,065 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] [2020-11-11 14:54:33,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:33,266 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:33,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:33,266 INFO L82 PathProgramCache]: Analyzing trace with hash 232938227, now seen corresponding path program 73 times [2020-11-11 14:54:33,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:33,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245568948] [2020-11-11 14:54:33,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:33,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245568948] [2020-11-11 14:54:33,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744197290] [2020-11-11 14:54:33,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:33,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:33,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:34,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:34,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:34,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:54:34,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532688993] [2020-11-11 14:54:34,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:54:34,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:34,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:54:34,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:54:34,157 INFO L87 Difference]: Start difference. First operand 4500 states and 12433 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) [2020-11-11 14:54:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:36,992 INFO L93 Difference]: Finished difference Result 7802 states and 19956 transitions. [2020-11-11 14:54:36,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 14:54:36,993 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 [2020-11-11 14:54:36,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:37,006 INFO L225 Difference]: With dead ends: 7802 [2020-11-11 14:54:37,006 INFO L226 Difference]: Without dead ends: 7650 [2020-11-11 14:54:37,007 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=629, Invalid=2127, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 14:54:37,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7650 states. [2020-11-11 14:54:37,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7650 to 4485. [2020-11-11 14:54:37,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4485 states, 4484 states have (on average 2.768956289027654) internal successors, (12416), 4484 states have internal predecessors, (12416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4485 states to 4485 states and 12416 transitions. [2020-11-11 14:54:37,108 INFO L78 Accepts]: Start accepts. Automaton has 4485 states and 12416 transitions. Word has length 58 [2020-11-11 14:54:37,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:37,108 INFO L481 AbstractCegarLoop]: Abstraction has 4485 states and 12416 transitions. [2020-11-11 14:54:37,108 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) [2020-11-11 14:54:37,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4485 states and 12416 transitions. [2020-11-11 14:54:37,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:37,114 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:37,114 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] [2020-11-11 14:54:37,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-11-11 14:54:37,315 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:37,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:37,315 INFO L82 PathProgramCache]: Analyzing trace with hash 89687429, now seen corresponding path program 74 times [2020-11-11 14:54:37,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:37,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042334819] [2020-11-11 14:54:37,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:37,610 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2020-11-11 14:54:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:37,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042334819] [2020-11-11 14:54:37,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616284235] [2020-11-11 14:54:37,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:37,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:54:37,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:37,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:37,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:38,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:38,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:38,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:54:38,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769493158] [2020-11-11 14:54:38,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:54:38,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:38,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:54:38,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:54:38,307 INFO L87 Difference]: Start difference. First operand 4485 states and 12416 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) [2020-11-11 14:54:40,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:40,905 INFO L93 Difference]: Finished difference Result 7698 states and 20101 transitions. [2020-11-11 14:54:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 14:54:40,906 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 [2020-11-11 14:54:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:40,916 INFO L225 Difference]: With dead ends: 7698 [2020-11-11 14:54:40,917 INFO L226 Difference]: Without dead ends: 7546 [2020-11-11 14:54:40,917 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 14:54:40,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7546 states. [2020-11-11 14:54:40,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7546 to 4565. [2020-11-11 14:54:40,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 4564 states have (on average 2.775197195442594) internal successors, (12666), 4564 states have internal predecessors, (12666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 12666 transitions. [2020-11-11 14:54:41,008 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 12666 transitions. Word has length 58 [2020-11-11 14:54:41,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:41,009 INFO L481 AbstractCegarLoop]: Abstraction has 4565 states and 12666 transitions. [2020-11-11 14:54:41,009 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) [2020-11-11 14:54:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 12666 transitions. [2020-11-11 14:54:41,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:41,013 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:41,013 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] [2020-11-11 14:54:41,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:41,216 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:41,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:41,216 INFO L82 PathProgramCache]: Analyzing trace with hash -868492983, now seen corresponding path program 75 times [2020-11-11 14:54:41,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:41,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113437287] [2020-11-11 14:54:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:41,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113437287] [2020-11-11 14:54:41,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084803782] [2020-11-11 14:54:41,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:41,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 14:54:41,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:41,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:41,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:41,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:54:41,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:42,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:42,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:54:42,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948887255] [2020-11-11 14:54:42,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:54:42,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:42,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:54:42,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:54:42,012 INFO L87 Difference]: Start difference. First operand 4565 states and 12666 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:45,039 INFO L93 Difference]: Finished difference Result 9028 states and 24021 transitions. [2020-11-11 14:54:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 14:54:45,041 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:54:45,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:45,053 INFO L225 Difference]: With dead ends: 9028 [2020-11-11 14:54:45,053 INFO L226 Difference]: Without dead ends: 8616 [2020-11-11 14:54:45,054 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=780, Invalid=2642, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 14:54:45,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8616 states. [2020-11-11 14:54:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8616 to 4655. [2020-11-11 14:54:45,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.7679415556510527) internal successors, (12882), 4654 states have internal predecessors, (12882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:45,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 12882 transitions. [2020-11-11 14:54:45,187 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 12882 transitions. Word has length 58 [2020-11-11 14:54:45,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:45,187 INFO L481 AbstractCegarLoop]: Abstraction has 4655 states and 12882 transitions. [2020-11-11 14:54:45,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:45,187 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 12882 transitions. [2020-11-11 14:54:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:45,192 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:45,193 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] [2020-11-11 14:54:45,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-11-11 14:54:45,393 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:45,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:45,394 INFO L82 PathProgramCache]: Analyzing trace with hash 214300813, now seen corresponding path program 76 times [2020-11-11 14:54:45,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:45,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418808353] [2020-11-11 14:54:45,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:45,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418808353] [2020-11-11 14:54:45,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794040687] [2020-11-11 14:54:45,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:45,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:54:45,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:45,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 14:54:45,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:46,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:46,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:46,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:54:46,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080286854] [2020-11-11 14:54:46,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:54:46,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:46,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:54:46,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:54:46,288 INFO L87 Difference]: Start difference. First operand 4655 states and 12882 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) [2020-11-11 14:54:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:49,323 INFO L93 Difference]: Finished difference Result 8169 states and 21381 transitions. [2020-11-11 14:54:49,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-11 14:54:49,325 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 [2020-11-11 14:54:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:49,335 INFO L225 Difference]: With dead ends: 8169 [2020-11-11 14:54:49,336 INFO L226 Difference]: Without dead ends: 8017 [2020-11-11 14:54:49,336 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=761, Invalid=2545, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 14:54:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8017 states. [2020-11-11 14:54:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8017 to 4815. [2020-11-11 14:54:49,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4815 states, 4814 states have (on average 2.7764852513502283) internal successors, (13366), 4814 states have internal predecessors, (13366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:49,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4815 states to 4815 states and 13366 transitions. [2020-11-11 14:54:49,432 INFO L78 Accepts]: Start accepts. Automaton has 4815 states and 13366 transitions. Word has length 58 [2020-11-11 14:54:49,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:49,432 INFO L481 AbstractCegarLoop]: Abstraction has 4815 states and 13366 transitions. [2020-11-11 14:54:49,432 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) [2020-11-11 14:54:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4815 states and 13366 transitions. [2020-11-11 14:54:49,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:49,437 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:49,438 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] [2020-11-11 14:54:49,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:49,638 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:49,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:49,639 INFO L82 PathProgramCache]: Analyzing trace with hash -743879599, now seen corresponding path program 77 times [2020-11-11 14:54:49,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:49,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55212864] [2020-11-11 14:54:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:49,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55212864] [2020-11-11 14:54:49,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041570219] [2020-11-11 14:54:49,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:50,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:54:50,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:50,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:50,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:50,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:54:50,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:50,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:50,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:54:50,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189150032] [2020-11-11 14:54:50,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:54:50,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:50,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:54:50,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:54:50,551 INFO L87 Difference]: Start difference. First operand 4815 states and 13366 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:54,949 INFO L93 Difference]: Finished difference Result 9573 states and 25463 transitions. [2020-11-11 14:54:54,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-11 14:54:54,951 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:54:54,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:54,966 INFO L225 Difference]: With dead ends: 9573 [2020-11-11 14:54:54,966 INFO L226 Difference]: Without dead ends: 9209 [2020-11-11 14:54:54,966 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1093, Invalid=3737, Unknown=0, NotChecked=0, Total=4830 [2020-11-11 14:54:54,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9209 states. [2020-11-11 14:54:55,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9209 to 4478. [2020-11-11 14:54:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 2.749385749385749) internal successors, (12309), 4477 states have internal predecessors, (12309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12309 transitions. [2020-11-11 14:54:55,064 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12309 transitions. Word has length 58 [2020-11-11 14:54:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:55,064 INFO L481 AbstractCegarLoop]: Abstraction has 4478 states and 12309 transitions. [2020-11-11 14:54:55,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:55,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12309 transitions. [2020-11-11 14:54:55,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:55,069 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:55,069 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] [2020-11-11 14:54:55,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-11-11 14:54:55,270 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:55,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:55,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1250705971, now seen corresponding path program 78 times [2020-11-11 14:54:55,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:55,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773318820] [2020-11-11 14:54:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:55,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773318820] [2020-11-11 14:54:55,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644843159] [2020-11-11 14:54:55,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:55,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:54:55,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:54:55,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 14:54:55,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:55,972 INFO L721 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-11 14:54:55,991 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:56,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:56,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-11-11 14:54:56,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730426551] [2020-11-11 14:54:56,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:54:56,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:56,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:54:56,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:54:56,004 INFO L87 Difference]: Start difference. First operand 4478 states and 12309 transitions. Second operand has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 19 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:58,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:54:58,731 INFO L93 Difference]: Finished difference Result 8427 states and 21287 transitions. [2020-11-11 14:54:58,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 14:54:58,734 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 19 states have internal predecessors, (82), 0 states have call successors, (0), 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 [2020-11-11 14:54:58,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:54:58,748 INFO L225 Difference]: With dead ends: 8427 [2020-11-11 14:54:58,748 INFO L226 Difference]: Without dead ends: 8187 [2020-11-11 14:54:58,749 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=506, Invalid=2146, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 14:54:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8187 states. [2020-11-11 14:54:58,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8187 to 4618. [2020-11-11 14:54:58,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4618 states, 4617 states have (on average 2.7717132337015378) internal successors, (12797), 4617 states have internal predecessors, (12797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 12797 transitions. [2020-11-11 14:54:58,848 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 12797 transitions. Word has length 58 [2020-11-11 14:54:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:54:58,849 INFO L481 AbstractCegarLoop]: Abstraction has 4618 states and 12797 transitions. [2020-11-11 14:54:58,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 19 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:54:58,849 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 12797 transitions. [2020-11-11 14:54:58,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:54:58,853 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:54:58,854 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] [2020-11-11 14:54:59,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-11-11 14:54:59,055 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:54:59,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:54:59,056 INFO L82 PathProgramCache]: Analyzing trace with hash 281044051, now seen corresponding path program 79 times [2020-11-11 14:54:59,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:54:59,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882883686] [2020-11-11 14:54:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:54:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:59,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882883686] [2020-11-11 14:54:59,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036336537] [2020-11-11 14:54:59,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:54:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:54:59,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:54:59,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:54:59,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:54:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:54:59,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:54:59,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:54:59,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8639788] [2020-11-11 14:54:59,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:54:59,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:54:59,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:54:59,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:54:59,915 INFO L87 Difference]: Start difference. First operand 4618 states and 12797 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) [2020-11-11 14:55:03,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:03,195 INFO L93 Difference]: Finished difference Result 8129 states and 21352 transitions. [2020-11-11 14:55:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-11 14:55:03,196 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 [2020-11-11 14:55:03,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:03,207 INFO L225 Difference]: With dead ends: 8129 [2020-11-11 14:55:03,207 INFO L226 Difference]: Without dead ends: 7977 [2020-11-11 14:55:03,208 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=855, Invalid=2805, Unknown=0, NotChecked=0, Total=3660 [2020-11-11 14:55:03,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7977 states. [2020-11-11 14:55:03,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7977 to 4748. [2020-11-11 14:55:03,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4748 states, 4747 states have (on average 2.7842848114598695) internal successors, (13217), 4747 states have internal predecessors, (13217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4748 states to 4748 states and 13217 transitions. [2020-11-11 14:55:03,304 INFO L78 Accepts]: Start accepts. Automaton has 4748 states and 13217 transitions. Word has length 58 [2020-11-11 14:55:03,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:03,305 INFO L481 AbstractCegarLoop]: Abstraction has 4748 states and 13217 transitions. [2020-11-11 14:55:03,305 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) [2020-11-11 14:55:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 4748 states and 13217 transitions. [2020-11-11 14:55:03,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:55:03,310 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:03,310 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] [2020-11-11 14:55:03,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-11-11 14:55:03,511 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:03,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:03,511 INFO L82 PathProgramCache]: Analyzing trace with hash -677136361, now seen corresponding path program 80 times [2020-11-11 14:55:03,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:03,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524511109] [2020-11-11 14:55:03,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:03,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524511109] [2020-11-11 14:55:03,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110116755] [2020-11-11 14:55:03,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:03,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:55:03,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:03,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:55:03,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:04,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:55:04,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:04,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:04,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:55:04,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770658448] [2020-11-11 14:55:04,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:55:04,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:04,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:55:04,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:55:04,213 INFO L87 Difference]: Start difference. First operand 4748 states and 13217 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:07,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:07,962 INFO L93 Difference]: Finished difference Result 9018 states and 23994 transitions. [2020-11-11 14:55:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-11 14:55:07,963 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:55:07,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:07,981 INFO L225 Difference]: With dead ends: 9018 [2020-11-11 14:55:07,981 INFO L226 Difference]: Without dead ends: 8654 [2020-11-11 14:55:07,982 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1079, Invalid=3613, Unknown=0, NotChecked=0, Total=4692 [2020-11-11 14:55:07,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8654 states. [2020-11-11 14:55:08,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8654 to 4518. [2020-11-11 14:55:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4518 states, 4517 states have (on average 2.757803852114235) internal successors, (12457), 4517 states have internal predecessors, (12457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4518 states to 4518 states and 12457 transitions. [2020-11-11 14:55:08,114 INFO L78 Accepts]: Start accepts. Automaton has 4518 states and 12457 transitions. Word has length 58 [2020-11-11 14:55:08,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:08,115 INFO L481 AbstractCegarLoop]: Abstraction has 4518 states and 12457 transitions. [2020-11-11 14:55:08,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:08,115 INFO L276 IsEmpty]: Start isEmpty. Operand 4518 states and 12457 transitions. [2020-11-11 14:55:08,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:55:08,119 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:08,119 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] [2020-11-11 14:55:08,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:08,320 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:08,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:08,321 INFO L82 PathProgramCache]: Analyzing trace with hash 900839287, now seen corresponding path program 81 times [2020-11-11 14:55:08,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:08,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255162471] [2020-11-11 14:55:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:08,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255162471] [2020-11-11 14:55:08,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743229749] [2020-11-11 14:55:08,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:08,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 14:55:08,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:08,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:55:08,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:09,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:09,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:09,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:09,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:09,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:55:09,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665085000] [2020-11-11 14:55:09,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:55:09,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:09,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:55:09,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:55:09,445 INFO L87 Difference]: Start difference. First operand 4518 states and 12457 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) [2020-11-11 14:55:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:12,789 INFO L93 Difference]: Finished difference Result 8187 states and 21307 transitions. [2020-11-11 14:55:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 14:55:12,791 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 [2020-11-11 14:55:12,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:12,804 INFO L225 Difference]: With dead ends: 8187 [2020-11-11 14:55:12,804 INFO L226 Difference]: Without dead ends: 8035 [2020-11-11 14:55:12,805 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=782, Invalid=2524, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 14:55:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8035 states. [2020-11-11 14:55:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8035 to 4623. [2020-11-11 14:55:12,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4623 states, 4622 states have (on average 2.7741237559498053) internal successors, (12822), 4622 states have internal predecessors, (12822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4623 states to 4623 states and 12822 transitions. [2020-11-11 14:55:12,920 INFO L78 Accepts]: Start accepts. Automaton has 4623 states and 12822 transitions. Word has length 58 [2020-11-11 14:55:12,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:12,920 INFO L481 AbstractCegarLoop]: Abstraction has 4623 states and 12822 transitions. [2020-11-11 14:55:12,920 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) [2020-11-11 14:55:12,920 INFO L276 IsEmpty]: Start isEmpty. Operand 4623 states and 12822 transitions. [2020-11-11 14:55:12,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:55:12,926 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:12,926 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] [2020-11-11 14:55:13,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-11-11 14:55:13,127 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:13,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:13,128 INFO L82 PathProgramCache]: Analyzing trace with hash -57341125, now seen corresponding path program 82 times [2020-11-11 14:55:13,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:13,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740611907] [2020-11-11 14:55:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:13,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740611907] [2020-11-11 14:55:13,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167515787] [2020-11-11 14:55:13,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:13,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:55:13,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:13,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 14:55:13,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:14,070 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:55:14,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:55:14,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:55:14,357 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:14,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:14,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:55:14,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879162758] [2020-11-11 14:55:14,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:55:14,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:14,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:55:14,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:55:14,373 INFO L87 Difference]: Start difference. First operand 4623 states and 12822 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:19,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:19,198 INFO L93 Difference]: Finished difference Result 9526 states and 25249 transitions. [2020-11-11 14:55:19,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-11 14:55:19,200 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:55:19,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:19,215 INFO L225 Difference]: With dead ends: 9526 [2020-11-11 14:55:19,215 INFO L226 Difference]: Without dead ends: 9162 [2020-11-11 14:55:19,215 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1048, Invalid=3374, Unknown=0, NotChecked=0, Total=4422 [2020-11-11 14:55:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9162 states. [2020-11-11 14:55:19,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9162 to 4443. [2020-11-11 14:55:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4443 states, 4442 states have (on average 2.753714542998649) internal successors, (12232), 4442 states have internal predecessors, (12232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:19,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4443 states to 4443 states and 12232 transitions. [2020-11-11 14:55:19,324 INFO L78 Accepts]: Start accepts. Automaton has 4443 states and 12232 transitions. Word has length 58 [2020-11-11 14:55:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:19,324 INFO L481 AbstractCegarLoop]: Abstraction has 4443 states and 12232 transitions. [2020-11-11 14:55:19,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:19,324 INFO L276 IsEmpty]: Start isEmpty. Operand 4443 states and 12232 transitions. [2020-11-11 14:55:19,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:55:19,329 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:19,329 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] [2020-11-11 14:55:19,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:19,530 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:19,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:19,530 INFO L82 PathProgramCache]: Analyzing trace with hash 664851141, now seen corresponding path program 83 times [2020-11-11 14:55:19,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:19,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976255320] [2020-11-11 14:55:19,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:19,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976255320] [2020-11-11 14:55:19,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510016527] [2020-11-11 14:55:19,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:19,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 14:55:19,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:19,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:55:19,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:20,305 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:20,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:20,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:20,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:55:20,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501497128] [2020-11-11 14:55:20,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:55:20,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:20,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:55:20,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:55:20,423 INFO L87 Difference]: Start difference. First operand 4443 states and 12232 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) [2020-11-11 14:55:25,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:25,260 INFO L93 Difference]: Finished difference Result 10186 states and 26528 transitions. [2020-11-11 14:55:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-11 14:55:25,262 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 [2020-11-11 14:55:25,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:25,278 INFO L225 Difference]: With dead ends: 10186 [2020-11-11 14:55:25,278 INFO L226 Difference]: Without dead ends: 9370 [2020-11-11 14:55:25,279 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1140, Invalid=4262, Unknown=0, NotChecked=0, Total=5402 [2020-11-11 14:55:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9370 states. [2020-11-11 14:55:25,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9370 to 4404. [2020-11-11 14:55:25,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4404 states, 4403 states have (on average 2.7749261866908927) internal successors, (12218), 4403 states have internal predecessors, (12218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 12218 transitions. [2020-11-11 14:55:25,385 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 12218 transitions. Word has length 58 [2020-11-11 14:55:25,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:25,386 INFO L481 AbstractCegarLoop]: Abstraction has 4404 states and 12218 transitions. [2020-11-11 14:55:25,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:25,386 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 12218 transitions. [2020-11-11 14:55:25,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:55:25,391 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:25,391 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] [2020-11-11 14:55:25,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-11-11 14:55:25,597 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:25,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:25,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1386250893, now seen corresponding path program 84 times [2020-11-11 14:55:25,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:25,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108340824] [2020-11-11 14:55:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:25,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108340824] [2020-11-11 14:55:25,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601178176] [2020-11-11 14:55:25,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:26,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:55:26,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:26,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:55:26,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:26,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:26,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:26,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:26,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:26,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:55:26,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102985598] [2020-11-11 14:55:26,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:55:26,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:26,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:55:26,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:55:26,630 INFO L87 Difference]: Start difference. First operand 4404 states and 12218 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) [2020-11-11 14:55:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:28,530 INFO L93 Difference]: Finished difference Result 6815 states and 17616 transitions. [2020-11-11 14:55:28,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:55:28,532 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 [2020-11-11 14:55:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:28,541 INFO L225 Difference]: With dead ends: 6815 [2020-11-11 14:55:28,542 INFO L226 Difference]: Without dead ends: 6663 [2020-11-11 14:55:28,542 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 14:55:28,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6663 states. [2020-11-11 14:55:28,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6663 to 4379. [2020-11-11 14:55:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4379 states, 4378 states have (on average 2.7782092279579715) internal successors, (12163), 4378 states have internal predecessors, (12163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4379 states to 4379 states and 12163 transitions. [2020-11-11 14:55:28,617 INFO L78 Accepts]: Start accepts. Automaton has 4379 states and 12163 transitions. Word has length 58 [2020-11-11 14:55:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:28,617 INFO L481 AbstractCegarLoop]: Abstraction has 4379 states and 12163 transitions. [2020-11-11 14:55:28,617 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) [2020-11-11 14:55:28,617 INFO L276 IsEmpty]: Start isEmpty. Operand 4379 states and 12163 transitions. [2020-11-11 14:55:28,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:55:28,621 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:28,621 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] [2020-11-11 14:55:28,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:28,822 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:28,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:28,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1912390435, now seen corresponding path program 85 times [2020-11-11 14:55:28,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:28,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770201509] [2020-11-11 14:55:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:29,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770201509] [2020-11-11 14:55:29,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093018326] [2020-11-11 14:55:29,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:29,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:55:29,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:29,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:29,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:29,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:29,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:29,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:55:29,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235678929] [2020-11-11 14:55:29,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:55:29,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:29,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:55:29,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:55:29,915 INFO L87 Difference]: Start difference. First operand 4379 states and 12163 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) [2020-11-11 14:55:32,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:32,246 INFO L93 Difference]: Finished difference Result 7277 states and 18598 transitions. [2020-11-11 14:55:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 14:55:32,248 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 [2020-11-11 14:55:32,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:32,258 INFO L225 Difference]: With dead ends: 7277 [2020-11-11 14:55:32,258 INFO L226 Difference]: Without dead ends: 7125 [2020-11-11 14:55:32,259 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=397, Invalid=1409, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 14:55:32,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7125 states. [2020-11-11 14:55:32,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7125 to 4371. [2020-11-11 14:55:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 4370 states have (on average 2.7837528604118993) internal successors, (12165), 4370 states have internal predecessors, (12165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 12165 transitions. [2020-11-11 14:55:32,340 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 12165 transitions. Word has length 58 [2020-11-11 14:55:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:32,340 INFO L481 AbstractCegarLoop]: Abstraction has 4371 states and 12165 transitions. [2020-11-11 14:55:32,340 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) [2020-11-11 14:55:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 12165 transitions. [2020-11-11 14:55:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:55:32,344 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:32,344 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] [2020-11-11 14:55:32,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:32,545 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:32,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:32,546 INFO L82 PathProgramCache]: Analyzing trace with hash 920720089, now seen corresponding path program 86 times [2020-11-11 14:55:32,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:32,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439614121] [2020-11-11 14:55:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:32,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439614121] [2020-11-11 14:55:32,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037114304] [2020-11-11 14:55:32,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:33,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:55:33,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:33,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 14:55:33,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:33,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:33,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:33,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:33,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:33,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-11-11 14:55:33,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046279311] [2020-11-11 14:55:33,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 14:55:33,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:33,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 14:55:33,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-11-11 14:55:33,719 INFO L87 Difference]: Start difference. First operand 4371 states and 12165 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) [2020-11-11 14:55:36,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:36,686 INFO L93 Difference]: Finished difference Result 7175 states and 18721 transitions. [2020-11-11 14:55:36,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 14:55:36,689 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 [2020-11-11 14:55:36,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:36,699 INFO L225 Difference]: With dead ends: 7175 [2020-11-11 14:55:36,699 INFO L226 Difference]: Without dead ends: 7023 [2020-11-11 14:55:36,700 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=474, Invalid=1688, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 14:55:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7023 states. [2020-11-11 14:55:36,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7023 to 4453. [2020-11-11 14:55:36,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 2.7904312668463613) internal successors, (12423), 4452 states have internal predecessors, (12423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 12423 transitions. [2020-11-11 14:55:36,782 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 12423 transitions. Word has length 58 [2020-11-11 14:55:36,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:36,782 INFO L481 AbstractCegarLoop]: Abstraction has 4453 states and 12423 transitions. [2020-11-11 14:55:36,782 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) [2020-11-11 14:55:36,782 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 12423 transitions. [2020-11-11 14:55:36,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:55:36,786 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:36,787 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] [2020-11-11 14:55:36,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-11-11 14:55:36,990 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:36,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:36,990 INFO L82 PathProgramCache]: Analyzing trace with hash 902082675, now seen corresponding path program 87 times [2020-11-11 14:55:36,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:36,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952303817] [2020-11-11 14:55:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:37,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952303817] [2020-11-11 14:55:37,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846376168] [2020-11-11 14:55:37,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:37,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 14:55:37,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:37,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 14:55:37,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:37,733 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:37,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:37,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-11-11 14:55:37,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392188799] [2020-11-11 14:55:37,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 14:55:37,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:37,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 14:55:37,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-11-11 14:55:37,746 INFO L87 Difference]: Start difference. First operand 4453 states and 12423 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:40,778 INFO L93 Difference]: Finished difference Result 8107 states and 21329 transitions. [2020-11-11 14:55:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 14:55:40,780 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 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 [2020-11-11 14:55:40,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:40,792 INFO L225 Difference]: With dead ends: 8107 [2020-11-11 14:55:40,792 INFO L226 Difference]: Without dead ends: 7867 [2020-11-11 14:55:40,793 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=522, Invalid=1928, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 14:55:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7867 states. [2020-11-11 14:55:40,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7867 to 4625. [2020-11-11 14:55:40,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4624 states have (on average 2.801686851211073) internal successors, (12955), 4624 states have internal predecessors, (12955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 12955 transitions. [2020-11-11 14:55:40,886 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 12955 transitions. Word has length 58 [2020-11-11 14:55:40,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:40,886 INFO L481 AbstractCegarLoop]: Abstraction has 4625 states and 12955 transitions. [2020-11-11 14:55:40,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 12955 transitions. [2020-11-11 14:55:40,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-11 14:55:40,891 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:40,891 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] [2020-11-11 14:55:41,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-11-11 14:55:41,092 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:41,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:41,093 INFO L82 PathProgramCache]: Analyzing trace with hash -56097737, now seen corresponding path program 88 times [2020-11-11 14:55:41,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:41,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931377938] [2020-11-11 14:55:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:41,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931377938] [2020-11-11 14:55:41,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976709887] [2020-11-11 14:55:41,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:41,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:55:41,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:41,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 14:55:41,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:41,999 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 14:55:42,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:42,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:42,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-11-11 14:55:42,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610937815] [2020-11-11 14:55:42,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 14:55:42,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:42,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 14:55:42,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-11-11 14:55:42,107 INFO L87 Difference]: Start difference. First operand 4625 states and 12955 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:44,414 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2020-11-11 14:55:46,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:46,989 INFO L93 Difference]: Finished difference Result 8743 states and 23541 transitions. [2020-11-11 14:55:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-11 14:55:46,991 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2020-11-11 14:55:46,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:47,004 INFO L225 Difference]: With dead ends: 8743 [2020-11-11 14:55:47,004 INFO L226 Difference]: Without dead ends: 8379 [2020-11-11 14:55:47,005 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=915, Invalid=3117, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 14:55:47,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8379 states. [2020-11-11 14:55:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8379 to 4381. [2020-11-11 14:55:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4381 states, 4380 states have (on average 2.7924657534246577) internal successors, (12231), 4380 states have internal predecessors, (12231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4381 states to 4381 states and 12231 transitions. [2020-11-11 14:55:47,135 INFO L78 Accepts]: Start accepts. Automaton has 4381 states and 12231 transitions. Word has length 58 [2020-11-11 14:55:47,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:47,135 INFO L481 AbstractCegarLoop]: Abstraction has 4381 states and 12231 transitions. [2020-11-11 14:55:47,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:47,136 INFO L276 IsEmpty]: Start isEmpty. Operand 4381 states and 12231 transitions. [2020-11-11 14:55:47,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:47,142 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:47,142 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] [2020-11-11 14:55:47,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:47,356 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:47,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:47,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1078831882, now seen corresponding path program 89 times [2020-11-11 14:55:47,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:47,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705824152] [2020-11-11 14:55:47,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:47,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705824152] [2020-11-11 14:55:47,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555947276] [2020-11-11 14:55:47,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:47,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 14:55:47,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:47,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:47,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:50,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:50,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:50,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:50,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918344617] [2020-11-11 14:55:50,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:50,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:50,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:50,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=363, Unknown=1, NotChecked=0, Total=506 [2020-11-11 14:55:50,589 INFO L87 Difference]: Start difference. First operand 4381 states and 12231 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) [2020-11-11 14:55:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:55,724 INFO L93 Difference]: Finished difference Result 6839 states and 17718 transitions. [2020-11-11 14:55:55,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 14:55:55,726 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 [2020-11-11 14:55:55,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:55,735 INFO L225 Difference]: With dead ends: 6839 [2020-11-11 14:55:55,735 INFO L226 Difference]: Without dead ends: 6687 [2020-11-11 14:55:55,736 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=376, Invalid=955, Unknown=1, NotChecked=0, Total=1332 [2020-11-11 14:55:55,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6687 states. [2020-11-11 14:55:55,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6687 to 4481. [2020-11-11 14:55:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4481 states, 4480 states have (on average 2.7792410714285714) internal successors, (12451), 4480 states have internal predecessors, (12451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4481 states to 4481 states and 12451 transitions. [2020-11-11 14:55:55,814 INFO L78 Accepts]: Start accepts. Automaton has 4481 states and 12451 transitions. Word has length 63 [2020-11-11 14:55:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:55,814 INFO L481 AbstractCegarLoop]: Abstraction has 4481 states and 12451 transitions. [2020-11-11 14:55:55,815 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) [2020-11-11 14:55:55,815 INFO L276 IsEmpty]: Start isEmpty. Operand 4481 states and 12451 transitions. [2020-11-11 14:55:55,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:55,819 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:55,819 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] [2020-11-11 14:55:56,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-11-11 14:55:56,022 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:56,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:56,022 INFO L82 PathProgramCache]: Analyzing trace with hash 680716004, now seen corresponding path program 90 times [2020-11-11 14:55:56,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:56,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094899303] [2020-11-11 14:55:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:56,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094899303] [2020-11-11 14:55:56,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62408207] [2020-11-11 14:55:56,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:56,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 14:55:56,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:55:56,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:56,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:55:57,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:55:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:57,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:55:57,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:55:57,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488266027] [2020-11-11 14:55:57,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:55:57,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:55:57,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:55:57,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:55:57,326 INFO L87 Difference]: Start difference. First operand 4481 states and 12451 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) [2020-11-11 14:55:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:55:58,993 INFO L93 Difference]: Finished difference Result 6774 states and 17583 transitions. [2020-11-11 14:55:58,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 14:55:58,997 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 [2020-11-11 14:55:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:55:59,008 INFO L225 Difference]: With dead ends: 6774 [2020-11-11 14:55:59,008 INFO L226 Difference]: Without dead ends: 6622 [2020-11-11 14:55:59,009 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 14:55:59,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6622 states. [2020-11-11 14:55:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6622 to 4506. [2020-11-11 14:55:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4505 states have (on average 2.7760266370699225) internal successors, (12506), 4505 states have internal predecessors, (12506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:55:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 12506 transitions. [2020-11-11 14:55:59,125 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 12506 transitions. Word has length 63 [2020-11-11 14:55:59,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:55:59,125 INFO L481 AbstractCegarLoop]: Abstraction has 4506 states and 12506 transitions. [2020-11-11 14:55:59,125 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) [2020-11-11 14:55:59,125 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 12506 transitions. [2020-11-11 14:55:59,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:55:59,130 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:55:59,130 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] [2020-11-11 14:55:59,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-11-11 14:55:59,344 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:55:59,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:55:59,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1750158186, now seen corresponding path program 91 times [2020-11-11 14:55:59,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:55:59,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520206350] [2020-11-11 14:55:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:55:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:55:59,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520206350] [2020-11-11 14:55:59,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480303381] [2020-11-11 14:55:59,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:55:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:55:59,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:55:59,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:00,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:00,464 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:00,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:00,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:00,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:00,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693829453] [2020-11-11 14:56:00,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:00,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:00,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:00,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:00,570 INFO L87 Difference]: Start difference. First operand 4506 states and 12506 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) [2020-11-11 14:56:02,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:02,530 INFO L93 Difference]: Finished difference Result 6900 states and 17833 transitions. [2020-11-11 14:56:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 14:56:02,533 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 [2020-11-11 14:56:02,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:02,542 INFO L225 Difference]: With dead ends: 6900 [2020-11-11 14:56:02,542 INFO L226 Difference]: Without dead ends: 6748 [2020-11-11 14:56:02,542 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 14:56:02,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2020-11-11 14:56:02,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 4556. [2020-11-11 14:56:02,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4556 states, 4555 states have (on average 2.7697036223929747) internal successors, (12616), 4555 states have internal predecessors, (12616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:02,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4556 states to 4556 states and 12616 transitions. [2020-11-11 14:56:02,619 INFO L78 Accepts]: Start accepts. Automaton has 4556 states and 12616 transitions. Word has length 63 [2020-11-11 14:56:02,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:02,619 INFO L481 AbstractCegarLoop]: Abstraction has 4556 states and 12616 transitions. [2020-11-11 14:56:02,619 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) [2020-11-11 14:56:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4556 states and 12616 transitions. [2020-11-11 14:56:02,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:02,624 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:02,624 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] [2020-11-11 14:56:02,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-11-11 14:56:02,825 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:02,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:02,825 INFO L82 PathProgramCache]: Analyzing trace with hash -222117746, now seen corresponding path program 92 times [2020-11-11 14:56:02,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:02,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854274397] [2020-11-11 14:56:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:03,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854274397] [2020-11-11 14:56:03,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417087183] [2020-11-11 14:56:03,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:03,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:56:03,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:03,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:03,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:04,164 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:04,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:04,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:04,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:04,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:04,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254142414] [2020-11-11 14:56:04,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:04,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:04,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:04,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:04,260 INFO L87 Difference]: Start difference. First operand 4556 states and 12616 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) [2020-11-11 14:56:06,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:06,567 INFO L93 Difference]: Finished difference Result 7045 states and 18128 transitions. [2020-11-11 14:56:06,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 14:56:06,569 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 [2020-11-11 14:56:06,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:06,580 INFO L225 Difference]: With dead ends: 7045 [2020-11-11 14:56:06,580 INFO L226 Difference]: Without dead ends: 6893 [2020-11-11 14:56:06,580 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=453, Invalid=1187, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 14:56:06,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6893 states. [2020-11-11 14:56:06,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6893 to 4581. [2020-11-11 14:56:06,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 2.766593886462882) internal successors, (12671), 4580 states have internal predecessors, (12671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:06,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 12671 transitions. [2020-11-11 14:56:06,664 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 12671 transitions. Word has length 63 [2020-11-11 14:56:06,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:06,664 INFO L481 AbstractCegarLoop]: Abstraction has 4581 states and 12671 transitions. [2020-11-11 14:56:06,664 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) [2020-11-11 14:56:06,664 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 12671 transitions. [2020-11-11 14:56:06,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:06,671 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:06,671 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] [2020-11-11 14:56:06,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:06,886 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:06,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:06,886 INFO L82 PathProgramCache]: Analyzing trace with hash -2021080056, now seen corresponding path program 93 times [2020-11-11 14:56:06,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:06,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491813846] [2020-11-11 14:56:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:07,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491813846] [2020-11-11 14:56:07,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053827870] [2020-11-11 14:56:07,401 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:07,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 14:56:07,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:07,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:07,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:08,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:08,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:08,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:08,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:08,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:08,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:08,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:08,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:08,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:08,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:08,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889088568] [2020-11-11 14:56:08,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:08,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:08,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:08,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:08,241 INFO L87 Difference]: Start difference. First operand 4581 states and 12671 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) [2020-11-11 14:56:10,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:10,496 INFO L93 Difference]: Finished difference Result 6850 states and 17763 transitions. [2020-11-11 14:56:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 14:56:10,498 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 [2020-11-11 14:56:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:10,509 INFO L225 Difference]: With dead ends: 6850 [2020-11-11 14:56:10,509 INFO L226 Difference]: Without dead ends: 6698 [2020-11-11 14:56:10,509 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=430, Invalid=1130, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 14:56:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6698 states. [2020-11-11 14:56:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6698 to 4581. [2020-11-11 14:56:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 2.766593886462882) internal successors, (12671), 4580 states have internal predecessors, (12671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 12671 transitions. [2020-11-11 14:56:10,594 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 12671 transitions. Word has length 63 [2020-11-11 14:56:10,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:10,594 INFO L481 AbstractCegarLoop]: Abstraction has 4581 states and 12671 transitions. [2020-11-11 14:56:10,595 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) [2020-11-11 14:56:10,595 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 12671 transitions. [2020-11-11 14:56:10,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:10,600 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:10,601 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] [2020-11-11 14:56:10,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-11-11 14:56:10,802 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:10,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:10,802 INFO L82 PathProgramCache]: Analyzing trace with hash 880201980, now seen corresponding path program 94 times [2020-11-11 14:56:10,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:10,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975755764] [2020-11-11 14:56:10,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:11,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975755764] [2020-11-11 14:56:11,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447815964] [2020-11-11 14:56:11,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:11,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:56:11,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:11,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:11,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:12,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:12,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:12,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:12,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:12,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:12,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:12,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:12,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:12,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:12,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:12,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097506335] [2020-11-11 14:56:12,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:12,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:12,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:12,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:12,301 INFO L87 Difference]: Start difference. First operand 4581 states and 12671 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) [2020-11-11 14:56:14,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:14,425 INFO L93 Difference]: Finished difference Result 6719 states and 17486 transitions. [2020-11-11 14:56:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 14:56:14,428 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 [2020-11-11 14:56:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:14,438 INFO L225 Difference]: With dead ends: 6719 [2020-11-11 14:56:14,438 INFO L226 Difference]: Without dead ends: 6567 [2020-11-11 14:56:14,439 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 14:56:14,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6567 states. [2020-11-11 14:56:14,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6567 to 4531. [2020-11-11 14:56:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4531 states, 4530 states have (on average 2.772847682119205) internal successors, (12561), 4530 states have internal predecessors, (12561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4531 states to 4531 states and 12561 transitions. [2020-11-11 14:56:14,519 INFO L78 Accepts]: Start accepts. Automaton has 4531 states and 12561 transitions. Word has length 63 [2020-11-11 14:56:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:14,520 INFO L481 AbstractCegarLoop]: Abstraction has 4531 states and 12561 transitions. [2020-11-11 14:56:14,520 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) [2020-11-11 14:56:14,520 INFO L276 IsEmpty]: Start isEmpty. Operand 4531 states and 12561 transitions. [2020-11-11 14:56:14,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:14,524 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:14,525 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] [2020-11-11 14:56:14,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-11-11 14:56:14,725 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:14,726 INFO L82 PathProgramCache]: Analyzing trace with hash -9321846, now seen corresponding path program 95 times [2020-11-11 14:56:14,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:14,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602842062] [2020-11-11 14:56:14,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:15,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602842062] [2020-11-11 14:56:15,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682433147] [2020-11-11 14:56:15,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:15,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 14:56:15,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:15,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:15,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:15,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:15,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:15,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:15,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806307086] [2020-11-11 14:56:15,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:15,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:15,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:15,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:15,861 INFO L87 Difference]: Start difference. First operand 4531 states and 12561 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) [2020-11-11 14:56:17,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:17,834 INFO L93 Difference]: Finished difference Result 6908 states and 17849 transitions. [2020-11-11 14:56:17,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 14:56:17,837 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 [2020-11-11 14:56:17,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:17,848 INFO L225 Difference]: With dead ends: 6908 [2020-11-11 14:56:17,849 INFO L226 Difference]: Without dead ends: 6756 [2020-11-11 14:56:17,849 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=463, Invalid=1343, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 14:56:17,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6756 states. [2020-11-11 14:56:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6756 to 4606. [2020-11-11 14:56:17,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4606 states, 4605 states have (on average 2.7635179153094462) internal successors, (12726), 4605 states have internal predecessors, (12726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:17,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4606 states to 4606 states and 12726 transitions. [2020-11-11 14:56:17,937 INFO L78 Accepts]: Start accepts. Automaton has 4606 states and 12726 transitions. Word has length 63 [2020-11-11 14:56:17,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:17,937 INFO L481 AbstractCegarLoop]: Abstraction has 4606 states and 12726 transitions. [2020-11-11 14:56:17,937 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) [2020-11-11 14:56:17,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4606 states and 12726 transitions. [2020-11-11 14:56:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:17,942 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:17,943 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] [2020-11-11 14:56:18,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:18,144 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:18,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1518718594, now seen corresponding path program 96 times [2020-11-11 14:56:18,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:18,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43746630] [2020-11-11 14:56:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:18,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43746630] [2020-11-11 14:56:18,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678654926] [2020-11-11 14:56:18,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:18,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 14:56:18,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:18,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:18,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:19,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:19,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:19,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:19,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700506352] [2020-11-11 14:56:19,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:19,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:19,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:19,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:19,435 INFO L87 Difference]: Start difference. First operand 4606 states and 12726 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) [2020-11-11 14:56:21,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:21,629 INFO L93 Difference]: Finished difference Result 7134 states and 18311 transitions. [2020-11-11 14:56:21,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 14:56:21,632 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 [2020-11-11 14:56:21,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:21,645 INFO L225 Difference]: With dead ends: 7134 [2020-11-11 14:56:21,646 INFO L226 Difference]: Without dead ends: 6982 [2020-11-11 14:56:21,646 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=479, Invalid=1327, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 14:56:21,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6982 states. [2020-11-11 14:56:21,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6982 to 4656. [2020-11-11 14:56:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4656 states, 4655 states have (on average 2.757465091299678) internal successors, (12836), 4655 states have internal predecessors, (12836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:21,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4656 states to 4656 states and 12836 transitions. [2020-11-11 14:56:21,743 INFO L78 Accepts]: Start accepts. Automaton has 4656 states and 12836 transitions. Word has length 63 [2020-11-11 14:56:21,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:21,743 INFO L481 AbstractCegarLoop]: Abstraction has 4656 states and 12836 transitions. [2020-11-11 14:56:21,743 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) [2020-11-11 14:56:21,743 INFO L276 IsEmpty]: Start isEmpty. Operand 4656 states and 12836 transitions. [2020-11-11 14:56:21,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:21,748 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:21,748 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] [2020-11-11 14:56:21,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:21,949 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:21,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:21,949 INFO L82 PathProgramCache]: Analyzing trace with hash -280243716, now seen corresponding path program 97 times [2020-11-11 14:56:21,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:21,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721743086] [2020-11-11 14:56:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:22,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721743086] [2020-11-11 14:56:22,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261658350] [2020-11-11 14:56:22,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:22,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:22,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:22,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:22,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:22,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:22,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662389638] [2020-11-11 14:56:22,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:22,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:22,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:22,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:22,927 INFO L87 Difference]: Start difference. First operand 4656 states and 12836 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) [2020-11-11 14:56:24,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:24,908 INFO L93 Difference]: Finished difference Result 7154 states and 18371 transitions. [2020-11-11 14:56:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 14:56:24,910 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 [2020-11-11 14:56:24,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:24,919 INFO L225 Difference]: With dead ends: 7154 [2020-11-11 14:56:24,920 INFO L226 Difference]: Without dead ends: 7002 [2020-11-11 14:56:24,920 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=501, Invalid=1391, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 14:56:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7002 states. [2020-11-11 14:56:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7002 to 4681. [2020-11-11 14:56:25,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4680 states have (on average 2.7544871794871795) internal successors, (12891), 4680 states have internal predecessors, (12891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 12891 transitions. [2020-11-11 14:56:25,029 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 12891 transitions. Word has length 63 [2020-11-11 14:56:25,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:25,029 INFO L481 AbstractCegarLoop]: Abstraction has 4681 states and 12891 transitions. [2020-11-11 14:56:25,029 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) [2020-11-11 14:56:25,029 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 12891 transitions. [2020-11-11 14:56:25,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:25,034 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:25,034 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] [2020-11-11 14:56:25,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:25,235 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:25,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:25,236 INFO L82 PathProgramCache]: Analyzing trace with hash -608046206, now seen corresponding path program 19 times [2020-11-11 14:56:25,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:25,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083041558] [2020-11-11 14:56:25,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:25,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083041558] [2020-11-11 14:56:25,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6903144] [2020-11-11 14:56:25,676 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:25,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:25,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:26,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:26,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:26,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:26,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452347624] [2020-11-11 14:56:26,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:26,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:26,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:26,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:26,401 INFO L87 Difference]: Start difference. First operand 4681 states and 12891 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) [2020-11-11 14:56:28,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:28,787 INFO L93 Difference]: Finished difference Result 7181 states and 18592 transitions. [2020-11-11 14:56:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 14:56:28,789 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 [2020-11-11 14:56:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:28,799 INFO L225 Difference]: With dead ends: 7181 [2020-11-11 14:56:28,799 INFO L226 Difference]: Without dead ends: 6701 [2020-11-11 14:56:28,799 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=529, Invalid=1633, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 14:56:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6701 states. [2020-11-11 14:56:28,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6701 to 4751. [2020-11-11 14:56:28,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4751 states, 4750 states have (on average 2.7423157894736843) internal successors, (13026), 4750 states have internal predecessors, (13026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4751 states to 4751 states and 13026 transitions. [2020-11-11 14:56:28,877 INFO L78 Accepts]: Start accepts. Automaton has 4751 states and 13026 transitions. Word has length 63 [2020-11-11 14:56:28,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:28,877 INFO L481 AbstractCegarLoop]: Abstraction has 4751 states and 13026 transitions. [2020-11-11 14:56:28,877 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) [2020-11-11 14:56:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 4751 states and 13026 transitions. [2020-11-11 14:56:28,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:28,881 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:28,882 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] [2020-11-11 14:56:29,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:29,082 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:29,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1788250652, now seen corresponding path program 98 times [2020-11-11 14:56:29,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:29,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161244564] [2020-11-11 14:56:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:29,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161244564] [2020-11-11 14:56:29,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779485467] [2020-11-11 14:56:29,498 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:29,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:56:29,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:29,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:29,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:30,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:30,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:30,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:30,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:30,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:30,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758338163] [2020-11-11 14:56:30,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:30,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:30,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:30,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:30,319 INFO L87 Difference]: Start difference. First operand 4751 states and 13026 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) [2020-11-11 14:56:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:32,397 INFO L93 Difference]: Finished difference Result 7003 states and 18066 transitions. [2020-11-11 14:56:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:56:32,399 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 [2020-11-11 14:56:32,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:32,408 INFO L225 Difference]: With dead ends: 7003 [2020-11-11 14:56:32,408 INFO L226 Difference]: Without dead ends: 6851 [2020-11-11 14:56:32,408 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 14:56:32,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6851 states. [2020-11-11 14:56:32,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6851 to 4776. [2020-11-11 14:56:32,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4776 states, 4775 states have (on average 2.7394764397905758) internal successors, (13081), 4775 states have internal predecessors, (13081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4776 states to 4776 states and 13081 transitions. [2020-11-11 14:56:32,485 INFO L78 Accepts]: Start accepts. Automaton has 4776 states and 13081 transitions. Word has length 63 [2020-11-11 14:56:32,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:32,485 INFO L481 AbstractCegarLoop]: Abstraction has 4776 states and 13081 transitions. [2020-11-11 14:56:32,485 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) [2020-11-11 14:56:32,485 INFO L276 IsEmpty]: Start isEmpty. Operand 4776 states and 13081 transitions. [2020-11-11 14:56:32,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:32,490 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:32,490 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] [2020-11-11 14:56:32,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-11-11 14:56:32,690 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:32,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:32,691 INFO L82 PathProgramCache]: Analyzing trace with hash -260210212, now seen corresponding path program 99 times [2020-11-11 14:56:32,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:32,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097369304] [2020-11-11 14:56:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:33,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097369304] [2020-11-11 14:56:33,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412908580] [2020-11-11 14:56:33,155 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:33,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 14:56:33,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:33,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:33,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:33,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:33,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:33,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:34,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:34,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:34,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752611205] [2020-11-11 14:56:34,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:34,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:34,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:34,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:34,049 INFO L87 Difference]: Start difference. First operand 4776 states and 13081 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) [2020-11-11 14:56:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:36,559 INFO L93 Difference]: Finished difference Result 6978 states and 18011 transitions. [2020-11-11 14:56:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:56:36,563 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 [2020-11-11 14:56:36,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:36,572 INFO L225 Difference]: With dead ends: 6978 [2020-11-11 14:56:36,573 INFO L226 Difference]: Without dead ends: 6826 [2020-11-11 14:56:36,573 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 14:56:36,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6826 states. [2020-11-11 14:56:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6826 to 4751. [2020-11-11 14:56:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4751 states, 4750 states have (on average 2.7423157894736843) internal successors, (13026), 4750 states have internal predecessors, (13026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:36,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4751 states to 4751 states and 13026 transitions. [2020-11-11 14:56:36,650 INFO L78 Accepts]: Start accepts. Automaton has 4751 states and 13026 transitions. Word has length 63 [2020-11-11 14:56:36,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:36,651 INFO L481 AbstractCegarLoop]: Abstraction has 4751 states and 13026 transitions. [2020-11-11 14:56:36,651 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) [2020-11-11 14:56:36,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4751 states and 13026 transitions. [2020-11-11 14:56:36,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:36,655 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:36,655 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] [2020-11-11 14:56:36,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-11-11 14:56:36,857 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:36,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2059172522, now seen corresponding path program 100 times [2020-11-11 14:56:36,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:36,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275230032] [2020-11-11 14:56:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:37,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275230032] [2020-11-11 14:56:37,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942885553] [2020-11-11 14:56:37,327 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:37,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 14:56:37,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:37,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:37,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:38,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:38,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:38,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:38,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:38,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:38,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:38,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:38,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:38,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:38,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:38,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323221655] [2020-11-11 14:56:38,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:38,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:38,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:38,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:38,353 INFO L87 Difference]: Start difference. First operand 4751 states and 13026 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) [2020-11-11 14:56:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:40,784 INFO L93 Difference]: Finished difference Result 6857 states and 17796 transitions. [2020-11-11 14:56:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 14:56:40,787 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 [2020-11-11 14:56:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:40,796 INFO L225 Difference]: With dead ends: 6857 [2020-11-11 14:56:40,796 INFO L226 Difference]: Without dead ends: 6705 [2020-11-11 14:56:40,796 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 14:56:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6705 states. [2020-11-11 14:56:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6705 to 4726. [2020-11-11 14:56:40,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4726 states, 4725 states have (on average 2.745185185185185) internal successors, (12971), 4725 states have internal predecessors, (12971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4726 states to 4726 states and 12971 transitions. [2020-11-11 14:56:40,872 INFO L78 Accepts]: Start accepts. Automaton has 4726 states and 12971 transitions. Word has length 63 [2020-11-11 14:56:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:40,872 INFO L481 AbstractCegarLoop]: Abstraction has 4726 states and 12971 transitions. [2020-11-11 14:56:40,872 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) [2020-11-11 14:56:40,872 INFO L276 IsEmpty]: Start isEmpty. Operand 4726 states and 12971 transitions. [2020-11-11 14:56:40,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:40,877 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:40,877 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] [2020-11-11 14:56:41,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-11-11 14:56:41,078 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:41,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:41,079 INFO L82 PathProgramCache]: Analyzing trace with hash -923972330, now seen corresponding path program 101 times [2020-11-11 14:56:41,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:41,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885613859] [2020-11-11 14:56:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:41,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885613859] [2020-11-11 14:56:41,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615342050] [2020-11-11 14:56:41,482 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:41,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 14:56:41,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:41,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:41,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:42,136 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:42,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:42,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:42,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589162752] [2020-11-11 14:56:42,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:42,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:42,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:42,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:42,251 INFO L87 Difference]: Start difference. First operand 4726 states and 12971 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) [2020-11-11 14:56:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:44,378 INFO L93 Difference]: Finished difference Result 7072 states and 18197 transitions. [2020-11-11 14:56:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:56:44,382 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 [2020-11-11 14:56:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:44,391 INFO L225 Difference]: With dead ends: 7072 [2020-11-11 14:56:44,391 INFO L226 Difference]: Without dead ends: 6920 [2020-11-11 14:56:44,392 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=491, Invalid=1401, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 14:56:44,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6920 states. [2020-11-11 14:56:44,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6920 to 4896. [2020-11-11 14:56:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4895 states have (on average 2.7262512768130747) internal successors, (13345), 4895 states have internal predecessors, (13345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 13345 transitions. [2020-11-11 14:56:44,471 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 13345 transitions. Word has length 63 [2020-11-11 14:56:44,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:44,471 INFO L481 AbstractCegarLoop]: Abstraction has 4896 states and 13345 transitions. [2020-11-11 14:56:44,471 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) [2020-11-11 14:56:44,471 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 13345 transitions. [2020-11-11 14:56:44,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:44,476 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:44,476 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] [2020-11-11 14:56:44,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:44,678 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:44,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:44,679 INFO L82 PathProgramCache]: Analyzing trace with hash 604068110, now seen corresponding path program 102 times [2020-11-11 14:56:44,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:44,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828654727] [2020-11-11 14:56:44,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:45,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828654727] [2020-11-11 14:56:45,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133353612] [2020-11-11 14:56:45,106 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:45,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 14:56:45,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:45,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:45,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:45,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:45,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:45,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:45,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154144830] [2020-11-11 14:56:45,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:45,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:45,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:45,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:45,870 INFO L87 Difference]: Start difference. First operand 4896 states and 13345 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) [2020-11-11 14:56:48,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:48,121 INFO L93 Difference]: Finished difference Result 7201 states and 18460 transitions. [2020-11-11 14:56:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 14:56:48,123 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 [2020-11-11 14:56:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:48,135 INFO L225 Difference]: With dead ends: 7201 [2020-11-11 14:56:48,135 INFO L226 Difference]: Without dead ends: 7049 [2020-11-11 14:56:48,135 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=456, Invalid=1350, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 14:56:48,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7049 states. [2020-11-11 14:56:48,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7049 to 4881. [2020-11-11 14:56:48,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4881 states, 4880 states have (on average 2.7278688524590162) internal successors, (13312), 4880 states have internal predecessors, (13312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:48,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4881 states to 4881 states and 13312 transitions. [2020-11-11 14:56:48,219 INFO L78 Accepts]: Start accepts. Automaton has 4881 states and 13312 transitions. Word has length 63 [2020-11-11 14:56:48,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:48,219 INFO L481 AbstractCegarLoop]: Abstraction has 4881 states and 13312 transitions. [2020-11-11 14:56:48,219 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) [2020-11-11 14:56:48,219 INFO L276 IsEmpty]: Start isEmpty. Operand 4881 states and 13312 transitions. [2020-11-11 14:56:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:48,224 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:48,224 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] [2020-11-11 14:56:48,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-11-11 14:56:48,426 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:48,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:48,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1194894200, now seen corresponding path program 103 times [2020-11-11 14:56:48,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:48,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806896264] [2020-11-11 14:56:48,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:48,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806896264] [2020-11-11 14:56:48,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109012659] [2020-11-11 14:56:48,834 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:48,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:48,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:49,647 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:49,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:49,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:49,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:49,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:49,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993517071] [2020-11-11 14:56:49,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:49,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:49,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:49,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:49,758 INFO L87 Difference]: Start difference. First operand 4881 states and 13312 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) [2020-11-11 14:56:52,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 14:56:52,656 INFO L93 Difference]: Finished difference Result 7265 states and 18588 transitions. [2020-11-11 14:56:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 14:56:52,660 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 [2020-11-11 14:56:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 14:56:52,670 INFO L225 Difference]: With dead ends: 7265 [2020-11-11 14:56:52,670 INFO L226 Difference]: Without dead ends: 7113 [2020-11-11 14:56:52,670 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=541, Invalid=1529, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 14:56:52,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2020-11-11 14:56:52,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 4876. [2020-11-11 14:56:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4876 states, 4875 states have (on average 2.7284102564102564) internal successors, (13301), 4875 states have internal predecessors, (13301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 14:56:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4876 states to 4876 states and 13301 transitions. [2020-11-11 14:56:52,751 INFO L78 Accepts]: Start accepts. Automaton has 4876 states and 13301 transitions. Word has length 63 [2020-11-11 14:56:52,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 14:56:52,751 INFO L481 AbstractCegarLoop]: Abstraction has 4876 states and 13301 transitions. [2020-11-11 14:56:52,751 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) [2020-11-11 14:56:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 4876 states and 13301 transitions. [2020-11-11 14:56:52,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-11 14:56:52,756 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 14:56:52,757 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] [2020-11-11 14:56:52,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:52,957 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 14:56:52,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 14:56:52,958 INFO L82 PathProgramCache]: Analyzing trace with hash 210572516, now seen corresponding path program 104 times [2020-11-11 14:56:52,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 14:56:52,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348389706] [2020-11-11 14:56:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 14:56:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 14:56:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:53,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348389706] [2020-11-11 14:56:53,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661318246] [2020-11-11 14:56:53,375 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 14:56:53,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 14:56:53,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 14:56:53,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 14:56:53,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 14:56:54,063 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 14:56:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 14:56:54,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 14:56:54,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-11-11 14:56:54,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224622219] [2020-11-11 14:56:54,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 14:56:54,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 14:56:54,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 14:56:54,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-11-11 14:56:54,138 INFO L87 Difference]: Start difference. First operand 4876 states and 13301 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) Received shutdown request... [2020-11-11 14:56:54,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 14:56:54,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-11-11 14:56:54,724 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-11 14:56:54,729 WARN L250 ceAbstractionStarter]: Timeout [2020-11-11 14:56:54,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.11 02:56:54 BasicIcfg [2020-11-11 14:56:54,730 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-11 14:56:54,731 INFO L168 Benchmark]: Toolchain (without parser) took 842656.60 ms. Allocated memory was 302.0 MB in the beginning and 1.1 GB in the end (delta: 838.9 MB). Free memory was 277.0 MB in the beginning and 845.4 MB in the end (delta: -568.5 MB). Peak memory consumption was 274.1 MB. Max. memory is 16.0 GB. [2020-11-11 14:56:54,731 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 302.0 MB. Free memory is still 271.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 14:56:54,731 INFO L168 Benchmark]: CACSL2BoogieTranslator took 651.45 ms. Allocated memory is still 302.0 MB. Free memory was 276.3 MB in the beginning and 247.6 MB in the end (delta: 28.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. [2020-11-11 14:56:54,732 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.56 ms. Allocated memory is still 302.0 MB. Free memory was 247.6 MB in the beginning and 245.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 14:56:54,732 INFO L168 Benchmark]: Boogie Preprocessor took 39.68 ms. Allocated memory is still 302.0 MB. Free memory was 245.6 MB in the beginning and 244.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 14:56:54,732 INFO L168 Benchmark]: RCFGBuilder took 520.19 ms. Allocated memory is still 302.0 MB. Free memory was 244.3 MB in the beginning and 265.6 MB in the end (delta: -21.3 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.0 GB. [2020-11-11 14:56:54,732 INFO L168 Benchmark]: TraceAbstraction took 841381.64 ms. Allocated memory was 302.0 MB in the beginning and 1.1 GB in the end (delta: 838.9 MB). Free memory was 264.5 MB in the beginning and 845.4 MB in the end (delta: -580.9 MB). Peak memory consumption was 259.0 MB. Max. memory is 16.0 GB. [2020-11-11 14:56:54,734 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 302.0 MB. Free memory is still 271.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 651.45 ms. Allocated memory is still 302.0 MB. Free memory was 276.3 MB in the beginning and 247.6 MB in the end (delta: 28.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 48.56 ms. Allocated memory is still 302.0 MB. Free memory was 247.6 MB in the beginning and 245.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 39.68 ms. Allocated memory is still 302.0 MB. Free memory was 245.6 MB in the beginning and 244.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 520.19 ms. Allocated memory is still 302.0 MB. Free memory was 244.3 MB in the beginning and 265.6 MB in the end (delta: -21.3 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 841381.64 ms. Allocated memory was 302.0 MB in the beginning and 1.1 GB in the end (delta: 838.9 MB). Free memory was 264.5 MB in the beginning and 845.4 MB in the end (delta: -580.9 MB). Peak memory consumption was 259.0 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 (4876states) and FLOYD_HOARE automaton (currently 7 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 25 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 841.1s, OverallIterations: 130, TraceHistogramMax: 6, AutomataDifference: 706.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 11746 SDtfs, 105550 SDslu, 135931 SDs, 0 SdLazy, 23517 SolverSat, 8219 SolverUnsat, 193 SolverUnknown, 0 SolverNotchecked, 416.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11071 GetRequests, 5995 SyntacticMatches, 43 SemanticMatches, 5032 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66634 ImplicationChecksByTransitivity, 331.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4896occurred in iteration=127, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 10.1s AutomataMinimizationTime, 129 MinimizatonAttempts, 293917 StatesRemovedByMinimization, 129 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 86.7s InterpolantComputationTime, 14049 NumberOfCodeBlocks, 14049 NumberOfCodeBlocksAsserted, 470 NumberOfCheckSat, 13796 ConstructedInterpolants, 9 QuantifiedInterpolants, 6164365 SizeOfPredicates, 504 NumberOfNonLiveVariables, 16852 ConjunctsInSsa, 1593 ConjunctsInUnsatCore, 253 InterpolantComputations, 7 PerfectInterpolantSequences, 0/4814 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